Golf IV / Jetta IV :: 2003 1.8t / Random Overheating Caused By Bad Heater Core?
Aug 10, 2014
I have a 2003 1.8t Jetta and I noticed my heater core is going bad (Common issue) so I smell G12 when I turn on my heat. But randomly and out of no where my car will start to over heat just a little. Never goes into the red though. Farthest it has ever been was about to the second mark past 190. It goes back down eventually and when I pop my hood it bubbles in the reserve a little and it does not do it again for about a few weeks or so. Could this be because of the heater core or might be a thermostat or bad coolant temp sensor?
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The subjects say's it all, is there a DIY for bypassing the heater core? I already search i couldn't find it...
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I have a new hose I need to install because the one on now is cracked... I have pulled the metal clip down, but how do I remove this so I can install the new one? I don't want to break anything else yanking on it too hard.
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My car had the smell of antifreeze coming from the vents, but it goes away when I use the "recirculating" button. Do u think it's the heater core? I hope not though. Also how much is the coolant suppose to be filled up too? Mine filled up a lot more then half the reservoir.
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I am working on a friends Neon and he been having an issue with constant overheating even through he has replaced the thermostat, the radiator, water pump and related hoses. However, he is missing the cap to the coolant tank and his heater core hoses are blocked, both incoming and outgoing. Could the blocked hoses be causes it to over heat?
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Truck has recently developed a weird overheat issue. Ill try to give a s much background as possible:
I changed the heater core in the winter and that definitely cured the lack of interior heat issue the truck had since I got it. Blows hard and hot now. (I suspect I should also swap out the rear one too)
On occasional since then I have noticed the odd time a "gurgling sound" in the heater core area. Its not all the time but here and there.
Within the last 3 weeks or so I have gotten a check engine light. I've been a bit too busy to address it, and don't tend to drive very far (work and back) but have downloaded the comp and have a P0174 and P1299. Now just in the last 5 days I have noticed the temp gauge , which is normally firmly parked at about 1/3 in the zone has moved up to nearly the hot area. I can easily bring it back down by using full heat. I have cleared the codes and they haven't returned yet, but I'm suspicious of them non the less.
What can cause lean on only one bank? I have looked at the usual suspects and don't see any obvious leaks. Is it very common to have a intake gasket leak? what's the easiest way to check for that?
My rad appears in good shape although the AC condenser is pretty beat up. I'm definitely going to flush out the coolant, it looks good and used.
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Plastic coupling between core and hose, is there a specialty to needed to remove from heater core?
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Last week I got a hole in my lower heater coolant line and I did a quick fix and added G12 to get the car home but I got to thinking, the way I'm using this car now, I'm not so sure I need the heater.
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My commute into the office was more difficult than usual because of the fumes pouring out of the vents. I have a 1997 F-150 5.4 V8. should I remove both in and out hoses from the firewall and connect them with a plastic fitting not to risk breaking the aluminum fittings on the motor?(There is an advanced a mile away) OR is it possible for me to remove the in hose from the firewall and remove the out hose from the motor, and run the in hose directly into the motor. Are the fittings the same and can I do that with limited time and tools?
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How to replace the heater core?
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Friend of mine has a 99 Ford F150 with the 5.4L. He thinks the heater core has gone on it as it blows a mist through the top vents when he turns the heater on. He can also smell antifreeze. Up here in Canada, its, well quite cold, nuff said about that. He has had estimates of anywhre from $800-$1000 to change it whereas the cost of the core is below $100. Is there anywhere that he can get a diagram.... of how to change it, all he knows was that he was told to remove the entire dash to gat at it.. Is that true ?
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I have a 2001 F150 with a 4.6L.. Do I need discharge the AC lines when replacing the heater core? How difficult is it to replace the heater core?
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My heater core has a leak in it, but I can not get it replaced so I want to bypass it. How do I do that? Is there a video somewhere? Or tutorial with pictures? F-150 1998 ....
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I have 1998 F-150 and the heater core was replaced 18 months ago. All was going well until about 2 weeks ago I noticed under heavy acceleration I would smell antifreeze. The smell would clear up and would not re appear for a day or so. Finally the other day when it was 8 outside I got in the truck and got about 5 miles from the house started up a hill and it was like a fog machine was mounted behind my dash the windows fogged up almost immediately so I figured great the core went bad again. Now the temperature has warmed up the last couple of days and there is nothing no fog in the cab the heater works fine just an occasional slight smell of antifreeze. Before I go through the trouble of tearing out the dash is there anything I should check I already checked the connections on the firewall and they were fine.
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I have a 2003 f150. I had to bypass the heater core and now my A/C isn't working. The A/C compressor don't even come ON.
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I have a '03 f 150 screw 4x4 with 5.4. I had to replace the heater core in the truck and I could hear air going through before the replacement. Now I can still hear it, have tried to burp the system a few times, even jacked up drivers side front on an incline to get reservoir higher. Ended up replacing the hose with the flow restrictor and that worked or so it seemed. The noise is back and I am lost on what to do next. I tested the head gasket and that came back negative also. What to do next or possibly what the issue is?
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I have a friend that wants me to replace his heater core on his 1998 f250 with a triton 5.4. I told him I would and I've done the one in my 1995 f150 5.8. is it the same process or where to find the step by step instructions.
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My heater core must have sprung a leak this week. Not that I need heat in this weather but just the smell of it while running the A/C just stinks. I know I am going to have to replace it myself but just for S&G, what would a dealer charge to replace it?
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Have a '02 f150 and thinking the heater core slowly dieing. Have noticed for several weeks a nice line of water leaking onto the passenger side floor. Do you have to take off the entire dash to get to it? Will be doing replacement myself as the dealer or shop would probably kill me on labor.
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New, to me, 2002 F-150 that developed heater core leak. I tore down the dash and replaced the heater core and reassembled everything.
All is good except that now the air bag light on the instrument cluster stays on continuously. There is no blinking...just a solid light that stays on.
I must have missed a connection, though I'm at a loss because I thought I got everything. Is there an obvious (though not obvious to me) connector that I should be looking for?
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I cant find my original post but I am reporting back on a low heat output issue. Not the climate door. It was the heater core clogging up. Instead of replacing, this is what I did. Purchased a "drill pump" and some clear hose and some CLR. Cut both the heater hoses,taking consideration of where best to install "T" connectors.
While hoses disconnected,filled heater core with CLR(as much as I could get in it). Hooked clear hose,drill pump configuration,on to the heater hoses. Ran drill pump in both directions for several minutes and stopping and letting it sit for a few minutes.
About 1 hour all together. Pieces of debris came out of the heater core and I could see it through the clear hose. Flushed the heater core out. Installed "T" connectors and it is heating very well now.
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