Dealership says they can fix with some kind of kit for around 1,000 dollars, not covered under warranty. You'll be pumping coolent straight through the block, which is good. Pour coolant into the other to fill the heater core and minimize any air pockets. I think I may have a heater core issue but I'd like to get the group's thoughts based on my symptoms… 1998 V70 T5 automatic For the past two years or so I have had a small coolant leak in that I have had to add water every 300-400 miles to the expansion tank to keep it full. Gurgling in Heater Core I had the coolant drained and cooling system acid-flushed recently in my 2000 Sierra with 4. I have been told to try and replace the water pump. Car Battery Terminal Voltage Chart. The first was bought new and had no gurgling in. 1978 - 1996 Big Bronco - Gurgling Sound From Heater Core - I've had a gurgling sound coming from the heater core for about a year. This time I'm placing a ground wire on my replacement heater core. Water Gurgling Noise Behind Stereo? warm up your car and check if problem still exist. The cooling system may be low. The intaake hose on heater core is warm and the out is cold. strong>Dear Laney: The gurgling sound you're hearing is usually the coolant flowing through the heater core. 2004 grand prix. Anyone else experience this problem? Sent from my iPhone using Tapatalk. Car heater problems are also frequently associated with heater core difficulties: coolant may not be traveling through the heater core properly, the air from the blower motor is not reaching it or there’s a clog in the small tubing of the heater core. If heater core is flowing good one hose should be cooler than other. I have a 2003 Camry. some gunk may flush out, then re install it and fill it up. But on thursday I started to smell radiator fluid/water smell (like off water / cat piss smell) just faintly, but on Friday I started to get visible steam coming out of my vents with climate control on. A water pump is a LOT easier to remove than a heater core. Heater worked fine since but I noticed about a month later I would hear a gurgling sound from the dash when I accelerated, and the heat would go from warm to quite a bit hotter. I fixed it, the gurgling rattle is gone I disconected the return heater hose at the bottom end then cut in a radiator flush kit fitting near the heater core on the flow to side. if it is because of a clogged up heater core or a faulty water pump it wont. Sounds like air in heater core or overflow tank. Have you seen any leaks or coolant on the ground?. I thought it had air in the system so I drew the cooling system down with vacuum and was able to get another half quart of coolant in it with a radkit plus vacuum coolant filling tool but it did not change anything. There is a gurgling sound coming from the front section of the car when I accelerate hard. Have a 2012 Ford Fusion, around 50,000 miles on it, makes gurgling noises. 9 diesels about every 4 to 5 years. Is the heater core under there? That is the only thing I could think of making that sound. #5 Low antifreeze with cause this, and no there is not a bleeder valve on either system for these trucks. and noticed that my car makes a gurgling noise when i first start the engine and. Tried up on ramps, running the motor till the fans come on and thermostat opens, spill free funnel used. There is a gurgling sound coming from the front section of the car when I accelerate hard. It sounds like it might be in your coolant system. There are two heater hoses that are attached to the heater core from under the hood. In addition, I have flushed the heater core, replaced the radiator and the sytem does not loose any coolant. We also have offices in Waitara, Normanhurst, Asquith, Wahroonga, North Wahroonga, Westleigh, Warrawee, Thornleigh, Hornsby Heights, Mount Colah. It had a very small rust hole in it. It will be a 2-3 day job. The upper hose gets warm, but the lower hose after the T-stat is cold. Do you need a local plumber in Parramatta? We provide all plumbing services in Harris Park, Mays Hill, Holroyd, Rosehill, Westmead, Granville, North Parramatta, Clyde, Camellia, Merrylands & Western Sydney. This tends to happen most when the engine is very hot, and is very common after shutting a hot engine down. It draws the cold air off the floor and blows it through the heater core up into the room which mixes and breaks up cold spots. Any ideas?. Thank You! January 6, 2015 : Followup from the Pelican Staff: We don't have a procedure for that. Most likely air trapped in the heater core. Yes, they are supposed to be the same size on the heater core. Best HEATER CORE FLUSH, Works 100% of the time Mystery of the Gurgling Heater Core - Duration: 7:04. The restrictor is a little plastic piece that is part of the "UE Recall Kit" for heater cores in VR Corrados. Hey shabalad0oooooo, I'm sorry to hear your heater isn't blowing hot air! Was your dealer able to offer any assistance? I would be happy to look into this concern further, if you would like to PM us your name, contact information, VIN, current mileage, and involved dealership. This guide is about Ford ranger heater not working. If you have air in your system and you can hear it, and you've purged the system (which happens through the coolant recovery tank if the system is sealed) you have some kind of leak, even a minute one. A non-operational heater is another sign of a bad heater core. Water gurgling sound in dash. Your heater core is leaking (passenger side sloshing, low coolant). sounds like water bubbles or water draining or something. I was smelling antifreeze earlier after I had taken the truck for a drive. Kept up for about first 2-3 minutes then stopped. I hear a gurgle noise coming from my heater core it's seems not to leak but just hear a gurgle noise does Installing a - Answered by a verified Chevy Mechanic. Shopsarahmac sells a wide range of items, from dress, electronic, accessories to all another products. There's a gurgling sound inside the dashboard of a vehicle. As mentioned here before, the heater core itself is an inexpensive part, however it is buried in the dash requiring 8-10 hours of labor. This gurgling phenomenon surfaced only after I put my coolant hose restrictor in. The noise is probably air going through the heater core. ) there is a clog in the heater core and needs to be flushed 3. In terms of severity, the problem could be on either side of that. If the problem is persistent, try bleeding the air out of your cooling system, since trapped air bubbles are a major cause of both overheating and gurgling. Quote; Share this post. The bubbling sound went away but the rear heat intermittent issue is still there. 3-liter V-6 in it. Doesn't matter what hose goes where. At theatre now so figured I could make it home and diagnose in am. A bad blower motor could make a "wild, loud" noise sort of like the one you complain about. but it is always good to have the cooling lines filled with coolant to the top. my car is totaled now, but I often wondered if maybe it had a tiny head gasket leak. Easy to use parts catalog. the heater core, and when you turn on the heat, you hear the coolant bubbling through the system. Have pressure tested the system, all ok. Air in heater core. T, Oct 29, 2017. Turns out the heater core popped in the dash board. But on thursday I started to smell radiator fluid/water smell (like off water / cat piss smell) just faintly, but on Friday I started to get visible steam coming out of my vents with climate control on. Remove the hoses from the metal pipes rather than the heater valve, it's much easier that way. I hear a gurgle noise coming from my heater core it's seems not to leak but just hear a gurgle noise does Installing a - Answered by a verified Chevy Mechanic. Generally speaking, gurgling noises are the sound of air or water moving around in your cooling system. It's been regularly maintained and has never overheated. Also some grimy liquid all around the bottom edge of the revealed end of the heater core. You should get bubbles coming up the top of the radiator. At theatre now so figured I could make it home and diagnose in am. Took it in right before the extended warranty was up at 95,000 miles and they told me it was air in the radiator hose and that it was normal and would go away. sometimes temperature fluctuating on gauge, other times right up on bust! heater. Remove the hoses from the metal pipes rather than the heater valve, it's much easier that way. Sounds like a partial clog in the core, or the core hoses. I know this is a well worn theme but I'm having no luck shifting the air out of the heater core in my 96 Legacy EJ22. Got some air out. Reservoir appeared to have pressure when I opened it. Could it be the heat core/coil? I just recently over heated (radiator was flushed 2 months ago on a routine service) and am trying to rule out other possibilities before I start worrying about the head gaskets. The gurgling noise is caused by coolant flowing back into the heater core inside the dash when the engine is started and the water pump begins circulating coolant. This tends to happen most when the engine is very hot, and is very common after shutting a hot engine down. Mine does it every once in a while. $1080 later and we have cold air again. Earlier, the gurgling sound would occur first thing in the morning as I pull of the driveway. Using 3/4" hose and 2 -1/2" NPT X 3/4" barbed hose adapters is possible, but kinking the hose is not, a couple 45 degree elbows should be used and route the hose so it does'nt kink. I have had a gurgling sound coming from the heater core in my 2001 AUG Passat. You should turn on the heater all the way to hot so coolant flows through the heater and recheck the cooling system level is full every morning for the next few days to get all the air out of the system. In addition, I have flushed the heater core, replaced the radiator and the sytem does not loose any coolant. Discussion in Curious if you guys park at an angle with the nose pointing down and that's causing air to get in the heater core. Turn off the power to the water heater at the breaker. Believe me fellows I searched and reviewed all posts/relating to this. Quote; Share this post. sometimes temperature fluctuating on gauge, other times right up on bust! heater. Answer: Sloshing is almost always caused by air in the cooling system, which allows the coolant to drain out of the heater core inside the dashboard when the engine is off. Any ideas?. 2007 town car. On some vehicles the use of a coolant flow restrictor slows the coolant flow and eliminates the gurgling sound. They are a direct replacement for a copper designed Heater Core. Heater core gurgling - Answered by a verified Cadillac Mechanic. Sounds like it towards the passenger side and I'm thinking it could be this air mix motor. TOM: But it could also be a problem with the blower motor. Everytime I start the car now for the first few seconds I hear a water gushing or gurgling noise behind the dash. In addition, I have flushed the heater core, replaced the radiator and the sytem does not loose any coolant. The fact that you are losing coolant says that there is definitely a leak within your cooling system whether it be a bad head gasket, leaking heater core, leaking freeze plug(s), or a cracked block. When it is it’s directed away from the engine by. There is no visible leaking from the core, or condensation on the windows to suggest a leaky core. Took it into the dealership and was told we needed to replace the evaporator core. The service tech even told me that it's "normal because I have a heater core". It is very possible that you have a blown/leaking head gasket. Gurgling noises as described is genereally air trapped in the heater core. STEP 3: Determine the location of the leak. Kept up for about first 2-3 minutes then stopped. The gurgling noise also indicates air. If recently. We recommend adding the proper amount of the BlueDevil Head Gasket Sealer. Also, if water goes through the heater core, would this affect acceleration as well? Just to clarify, when I hear the gurgling noises, the acceleration feels slightly (albeit noticeably) laggier, and I can "feel" the gurgling on the acceleration pedal. 4L DSL Turbo. 2 l engine - overheating, coolant disappearing, within 15 minutes engine redlining, can sometimes hear gurgling noise coming from somewhere inside or under dash(?), when heat is turned off. HEATER CORES – Calsonic Home HEATER CORES CONSTRUCTION • Integral water valves available Size • 25 and 35mm core depths and up to 200mm core width Testing • In-house laboratories to validate performance, corrosion and durability * Nocolok™ is a patented brazing process of Alcan …. I know this is a well worn theme but I'm having no luck shifting the air out of the heater core in my 96 Legacy EJ22. I make videos in english, german and spanish and many of my home made videos are applicable to ma More About geRAMicc85 » Here i am showing you how i solved the heating problem on. Bought a 1998 Plymouth Breeze 2. Humming electric motors – Humming may indicate that the starting capacitor needs replacement. There is no visible leaking from the core, or condensation on the windows to suggest a leaky core. I have a 2001 Civic LX with 82000 miles and I'm hearing a "gurgling" sound coming from behind the dash. Does your car use any coolant? Does it ever run too warm? Check the reservoir and make sure. According to the Popular Mechanics website, a common cause of a car's heater not working is a buildup in the heater core. Check the heater core temperature. If your car has a copper radiator or heater core, the coolant is contaminated with lead solder. If it was that on the Saturn, I would think you would get readings out of the normal range on your temp gauge. Mine does it every once in a while. The gurgling effect from your hot water heater may start when you try to run a few appliances at the same time. I have the climate control 07' and I was thinking a failing heater control valve that is not completely closing. Use an element puller (Image 1) to remove the bad element. It seems with the warmer weather now, once the engine is hot, it gurgles more frequently (Almost ever acceleration from stop). 2003 Ford Ranger Heater Core Replacement Complete , Heater core shortcut , How to change the heater core in a 1990-1996 C4 Corvette. I was able to make it go away when I adjust the passenger side to full heat. CarComplaints. Disconnected the heater hoses, connected hoses that I made up with garden hose fittings on the ends. Some 2007-11 Civic/ Fit compact cars may emit a gurgling noise from under the dashboard at idle, under light acceleration or during deceleration. After the truck runs for a while, and I turn the heat on there is no noise and stays at a constant temp. i have a 1997 Chevy blazer w/ a 4. I usually only hear it when its warming up. if it is because of a clogged up heater core or a faulty water pump it wont. Our 2014 started doing the same thing: blowing warm air and hissing sound coming from the dash. You might have a wind shield leak. Answer: Sloshing is almost always caused by air in the cooling system, which allows the coolant to drain out of the heater core inside the dashboard when the engine is off. This will cause air pockets to get inside of the heater core, thermostat, and radiator hoses. I found another problem with my "new" 1992 F-150 today. is the gurgling (maybe more like a siphoning sound) a sign of a bad heater core (heard the same sound in my supra the night. You may already have your own system to bleed a Subaru cooling system, if not here are some ideas we found will work. Heater Core Restrictor I made one and stuck it into the 5/8" hose off the water pump to the heater core thinking that the pump pumps coolent through heater core and returns it intake. The upper hose gets warm, but the lower hose after the T-stat is cold. Coolant resevior gurgling. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. 5-12 Dodge 6. Inline Plumbing and Electrical has been operating for over 25 years providing Sydney and outer regions with outstanding plumbing and electrical services. Turning it to "hot" opens the valve to the heater core. however my wife's VW was leaking water in the floor board and your could hear it when you go around corners. Owners of 2007-08 Honda Fit models may come into your store with a complaint of a gurgling-type noise from under the dashboard at idle, under light acceleration or during deceleration. The heater core on my 1998 Dodge Ram was gugrling air on startup, sounding like a percolating coffee maker when I would start the. We get all kinds of calls about weird water heater noises, ranging from water heaters whistling, to water heaters sounding like they’re full of rocks, and yes, we even get calls about water heaters sounding like hissing snakes. You might have a wind shield leak. The Nova is bypassing the heater core. Lately, (and this just started) whenever I start my truck after it has sat overnight, I hear a gurgling sound from the heater core whenever I rev the engine a little, and then it goes away after about a minute of the truck. Who is correct?. You should get bubbles coming up the top of the radiator. Hey, My 6 cyl VT Berlina has been making a water gurgling noise in the dash very occasionally when it's first started. Air pockets and low coolant levels are the most common problems. Yet I hear a gurgling sound from under the dash near the glove box. The excessive air in the system will mix with the coolant and create the gurgling noise. Dealership says they can fix with some kind of kit for around 1,000 dollars, not covered under warranty. CarComplaints. There should be a dedicated gas shut off valve on the gas line leading to the tank. Air in the heater core will allow partial evaporation of water out of the coolant. Quality water heaters. Ethylene glycol coolants smell like sweet fruit juice. Heres a link on how to purge it. Over time, this very corrosive, concentrated coolant will eat its way through the aluminum where there is no solid stream of coolant flowing and perforate the heater core. Bought a 1998 Plymouth Breeze 2. will keep that in mind PBURNETT, but if you hear the gurgling from behind the dash area, it is most likely air trapped in your heater core unless you suffer from a bad WP as OP stated. They did not replace the heater core, but recommended that I do so. There is no visible leaking from the core, or condensation on the windows to suggest a leaky core. Extreme Humidity On Windows. I thought I had bled the coolant right but I guess not. Even when it is running it will sometimes trip on overheat while the heater in the cab is still blowing cold. This time I'm placing a ground wire on my replacement heater core. What I have done so far is: raised the car 12" in front, removed rad cap, topped both tanks, turned on high heat and ran to open thermostat. I didn't notice an excessive abount of crud coming out, and the flush flow seemed pretty good - not restricted. I have had a gurgling sound coming from the heater core in my 2001 AUG Passat. Ever since a friend and I changed the timing belt and water pump on the car, I think there has been air trapped in the heater core. I hear a gurgling sound behind my dashboard (sometimes) when I start my 00 Subaru Outback. 2 I have seen heater core replacements done with excellent craftsmanship, where the dash got put back together exactly as it came from the factory, everything worked right, no additional rattles, etc. I have a 2003 Camry. The only other suggestion that I have is that it might be her heater core. Dealership says they can fix with some kind of kit for around 1,000 dollars, not covered under warranty. Connected my garden hose and flushed it both ways 6 times. I was searching on google and found a discussion on this which said "There is a weep hole on the heater core hoses (usually the passenger side hose). It means there is air in your cooling system, and this is always a bad thing. Turning it to "hot" opens the valve to the heater core. Air in the Heater Core: While the engine is running coolant is being pushed through the heater core. Check the carpet and under the dash for wetness to discover the source of the leak. Shop our large selection of parts based on brand, price, description, and location. You'll be pumping coolent straight through the block, which is good. Have pressure tested the system, all ok. A gurgling sound from your water heater may only last only 3-4 seconds, but be aware that if other appliances set off the gurgling affect from your hot water tank, you may have bigger problems. Engine coolant travels from the water pump through a hose and through the heater core, which resembles a small radiator. Question from Rex (1959): Here's a question regarding the heater in my '59. But on thursday I started to smell radiator fluid/water smell (like off water / cat piss smell) just faintly, but on Friday I started to get visible steam coming out of my vents with climate control on. Start by checking the fluid level in the reservoir, filling it to the "full" line when the engine is cold. Needless to say, I'm a bit hacked off. (Yeah, I had some bad luck with heater cores back in the day. The gurgling noise also indicates air. The gurgling noise is caused by coolant flowing back into the heater core inside the dash when the engine is started and the water pump begins circulating coolant. This can happen for a number of reasons, including a blown head gasket or a leak developing in the heater control valve. I usually only hear it when its warming up. It is the heater core temp sensor, it tells the HEVAC system when the coolant is up to tmperature and to allow the heater to fully utilise the hot air should it be required to maintain comfort levels. When the engine is first started and the thermostat remains closed, a hot water bypass line permits heated coolant flow to the electric pump and heater core. If anyone knows what this is please let me know! that this gurgling sound may becaused. Heres a link on how to purge it. Hey shabalad0oooooo, I'm sorry to hear your heater isn't blowing hot air! Was your dealer able to offer any assistance? I would be happy to look into this concern further, if you would like to PM us your name, contact information, VIN, current mileage, and involved dealership. Our 2014 started doing the same thing: blowing warm air and hissing sound coming from the dash. Revision D – 02/07/2009. This tends to happen most when the engine is very hot, and is very common after shutting a hot engine down. But on thursday I started to smell radiator fluid/water smell (like off water / cat piss smell) just faintly, but on Friday I started to get visible steam coming out of my vents with climate control on. I was able to make it go away when I adjust the passenger side to full heat. I turned the heater on, the gurgling stopped, and then it started leaking. Loose water sucks on so many levels. Hope that makes the difference. The heater core on my 1998 Dodge Ram was gugrling air on startup, sounding like a percolating coffee maker when I would start the. hi guys, weird noise coming from behind the dash sound near the driver's side. Sounds like it towards the passenger side and I'm thinking it could be this air mix motor. Lately, (and this just started) whenever I start my truck after it has sat overnight, I hear a gurgling sound from the heater core whenever I rev the engine a little, and then it goes away after about a minute of the truck. Inspect the heater core and attached hoses for leaks. Air in the Heater Core: Your car’s heater core uses coolant to provide the heat for your cabin. My 99 SL2 makes a gurgling or sloshing noise occasionally, usually under hard acceleration or when going uphill. Determine which heater hose is the return hose (from the heater to the rest of the cooling system). A non-operational heater is another sign of a bad heater core. Air pockets and low coolant levels are the most common problems. The cause of this is most likely. Heater worked fine since but I noticed about a month later I would hear a gurgling sound from the dash when I accelerated, and the heat would go from warm to quite a bit hotter. Your heater core is leaking (passenger side sloshing, low coolant). 0L Turbo that should be the sound of the air in the coolant system @ the heater core (no air in system, no gurgling). Passenger Cars, Mini Vans, SUV Service and Repairs. You are hearing the increased flow of coolant to the heater core as you come off idle, as your auxiliary pump is non-functional. Gurgling in Heater Core I had the coolant drained and cooling system acid-flushed recently in my 2000 Sierra with 4. 3-liter V-6 in it. flushed out the heater core and nothing came out besides coolant. The heater core, which. In terms of severity, the problem could be on either side of that. I hear a gurgling sound behind my dashboard (sometimes) when I start my 00 Subaru Outback. This guide is about Ford ranger heater not working. A heater core is part of an automobile cooling system, which keeps the engine from overheating. I have a 2008 Pruis that acts like it has a plugged heater core but I wonder if there is more to it. Water Gurgling Noise Behind Stereo? warm up your car and check if problem still exist. Both of these symptoms are caused by a leak in your heater core. The coolant needs to be flushed and replaced. Then I placed the garden hose in the bottom end of the return hose and turned it on full blast for a good five miinutes. Clean heater core Bissell ProHeat Carpet Cleaner - ROLLERS SPIN Fixing Repair DIY water , Cooling system maintenance - flushing the radiator core and cooling fins , Car Overheating -How to Clean the Radiator Core of a Clogged Radiator , Won't SPRAY solution Rollers spin Fixing Bissell ProHeat Carpet Cleaner Repair DIY water heater core. If you haven’t drained your Annapolis, MD water heater in a while, you can schedule an appointment today with Heidler, Inc. most likely there is air in the system if your heater core is gurgling when you push the gas in fast acceleration. If done with the setting on "cold", most of the time there will be a large air bubble in the heater core. Believe me fellows I searched and reviewed all posts/relating to this. Any ideas?. It helps to point the truck up an incline. My Bronco is a 95 EB, w/5. Heater core restricted. As I increased the RPM's, the sound was more prominent. To "flush" the core I turn the heater on and the gurgling goes awayuntil I start it again later. Small radiator looking thing located inside your dash behind the glove compartment. If the problem is persistent, try bleeding the air out of your cooling system, since trapped air bubbles are a major cause of both overheating and gurgling. I have a 2008 Pruis that acts like it has a plugged heater core but I wonder if there is more to it. Why does heater core make gurgling sound in a 2003 Chevy Impala? You may be low on coolant or there is an air pocket trapped in the system, also be sure the radiator cap is good. If the boom or banging noise is located at the heater, a delayed gas ignition is most likely the problem. Lately, (and this just started) whenever I start my truck after it has sat overnight, I hear a gurgling sound from the heater core whenever I rev the engine a little, and then it goes away after about a minute of the truck. Today's EATC systems use blend doors to blend ambient, heated, and cooled air to achieve the desired temperature. Best HEATER CORE FLUSH, Works 100% of the time. There is no visible leaking from the core, or condensation on the windows to suggest a leaky core. Many people use a water heater instead of a boiler for radiant floor heat because it COSTS LESS. Determine which heater hose is the return hose (from the heater to the rest of the cooling system). I have bleed the system and regardless the system will purge itself after the car has been run. Check the hoses first, but thanks to their being sheltered from the elements, hose failure at the heater core is probably less common than the core itself developing a leak. The gurgling is the coolant going thru the heater core Click to expand Well technically the sound is not the coolant passing through the heater core but the air passing through the heater core. The cooling system may be low. Hey, My 6 cyl VT Berlina has been making a water gurgling noise in the dash very occasionally when it's first started. will keep that in mind PBURNETT, but if you hear the gurgling from behind the dash area, it is most likely air trapped in your heater core unless you suffer from a bad WP as OP stated. dont be scared to give it a lil gas to while your bleeding, nothing over 2 and a half grand is necesary. When the engine is first started and the thermostat remains closed, a hot water bypass line permits heated coolant flow to the electric pump and heater core. Your Chevrolet Impala will be happy to know that the search for the right Heater Core products you've been looking for is over! Advance Auto Parts has 17 different Heater Core for your vehicle, ready for shipping or in-store pick up. I lose coolant in cold weather. Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by KH. Heater worked fine since but I noticed about a month later I would hear a gurgling sound from the dash when I accelerated, and the heat would go from warm to quite a bit hotter. On some vehicles the use of a coolant flow restrictor slows the coolant flow and eliminates the gurgling sound. Low coolant level A low coolant level will allow too much air in the cooling system. When you burp the coolant, always make sure the heater control is turned all the way to the "hot" side, and make sure the car gets totally warmed up before you finish. My 2005 Pilot EX-L also has a gurgling/grinding noise from behind the CD changer (non-Navi). In addition, I have flushed the heater core, replaced the radiator and the sytem does not loose any coolant. I just know that if you see fluid on your passenger floorboard then you have a problem. The heater core leaked some coolant in the tray, but I caught it and changed it before the coolant got on my carpet. I found another problem with my "new" 1992 F-150 today. The blower on low, set to floor and high heat. Choose top quality brands Metrix, Spectra Premium. One likely cause of the annoyance, reports Honda, is an air-bound heater core. Chances are you’re here because your water heater is making some weird noises. I remember hearing the waterfall gurgling noise a couple of times when I first drove it home. My wife's old HHR not to long after she bought it had what sounded like running or gurgling water right behind the dash, dealer tracked it down to a clogged A/C drain. I have had a gurgling sound coming from the heater core in my 2001 AUG Passat. The gurgling tcndeb is having - Are you running the defroster or AC? The AC system will gurgle and that may be what you are hearing. Our 2014 started doing the same thing: blowing warm air and hissing sound coming from the dash. A heater core is part of an automobile cooling system, which keeps the engine from overheating. The bubbling sound went away but the rear heat intermittent issue is still there. Hello Vince, I've been having problems with my 1991 Ford E-250 heater core leaking. It's your heater core. Seems strange to have a heater core fail so quickly. I've always kept the coolant tank filled to rule out air pockets. Then I placed the garden hose in the bottom end of the return hose and turned it on full blast for a good five miinutes. I have a loop hot water system (forced hot water). The heater control valve is typically not service able and is just replaced if faulty. The coolant needs to be flushed and replaced. With the cap off run it with the heat on full blast, add coolent as nessasary and when the bubbles stop it should be done. then refill to the top. Air in the Heater Core: While the engine is running coolant is being pushed through the heater core. Average failure mileage is 29,050 miles. The first was bought new and had no gurgling in. Check the hoses first, but thanks to their being sheltered from the elements, hose failure at the heater core is probably less common than the core itself developing a leak. When all else fails, you can usually get relief by bleeding the heater core. The 2012 Ford Fusion has 1 problems reported for gurgling noise under dash. On a gas water heater, the sediment creates hot spots that can damage the tank and cause premature failure.