GTI 337/20th Anniversary :: Coolant Bubbling But No Overheating
Sep 3, 2013
So I noticed one day when I was standing outside of my car right after I had turned it off that I could hear the coolant bubbling some. I had just recently flushed the coolant, put on a new water pump, thermostat, and put in a new reservoir with a new cap so I figured it was just some air in the system because there was air in the top radiator hose. So I just worked the air out and thought that was it. The next time I drove my car it did it again and there was no pressure release when I took off the cap either. I ended up getting the head worked on (valve job and check the head for warping). Even after all of this my reservoir doesn't seem to build pressure and every time there also seems to be air in the top radiator hose. After the car is warm I can work coolant back in the hose and 5 minutes later theres air back in it. I've pretty much replaced everything with the cooling system besides the hoses within the last year so I don't know what it could possibly be.
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I have 2001 Nissan Xterra SE 3.3L V6. A few weeks ago my car started to overheat while going through the grapevine (mountain pass in SoCal). After filling it up with coolant, I took it to the shop. They couldn't figure out what exactly was the problem. It passed the block test and such. They said the top hose was swelling up as if something was blocking it. They also said my car was going through about a gallon of coolant. They replaced the water pump, thermostat, and the top hose. they also replaced the timing belt.
After driving the car for an hour, it started to overheat again. This time, I took it to the Nissan dealership. They said the timing belt was off by 2 teeth and they think that's why it overheated, so they fixed that problem. They also did a cooling system test and found no leaks.
I got the car back and it still overheats. After the turn off the car, I see coolant being bubbling back into the reservoir almost to the top. Also, my radiator was replaced about a year ago.
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Today, the air conditioning stopped working in my 2003 Elantra. Just stopped blowing cold air. Then the engine thermometer kept on climbing. When I pulled over home, I lifted the hood and heard a lot of bubbling and gurgling sounds, and coolant fluid leaked out underneath the car.
What could be the cause of this? When I let the car stay for a while, the AC did kick back on, but only for a few moments and the thermometer kept on climbing again until I turned the car off. The fan is blowing, I can hear it, but it is obviously not cooling the engine off appropriately.
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So yesterday, my car started overheating, not when i'm driving, but when it's idling, then when i turn my heat on, it goes back to normal.
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I am having a weird overheating issue, it usually happens when the car is idling, and cools down when i start to drive the car again. What could be causing this problem.
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Car was running fine on friday when I left for detroit, it sat in my driveway all weekend, but on the way to work this morning I get a warning light to STOP and my temp gauge is right below 260. It took about 10 miles for the light to come on and the car does NOT overheat while idling. The car is only at 52k and I have not replaced the water pump/timing belt yet.
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My brothers jetta is over heating constantly. The thermo switch on the radiator and controller box under the battery have been replaced. The fans dont come on till just before the red mark on the gauge. There are no water leaks, and we can hear gurgling when running the engine. How can we tell if the water pump is bad or not and where is the thermostat if it has one.
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Was driving home yesterday from work and the dash light up saying the car was overheating. Was too dark last night to look at everything so this morning I checked all the fluids and everything was OK.
Drove around the block a few times and noticed when starting the car the thermostat said normal temperature (straight up) even though it was cold, then climbed into the redzone, dropped to zero, then shot back up into the red. the upper radiator hose is hot so fluid is flowing.
Thoughts are bad water pump, thermostat, or blown head gasket after going though my repair book. Not sure how to check any of these. Also ran VAG and nothing came up.
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So just for a little bit of a background, I have an Imola 20th with 165k miles on it lowered on B&G's, stage II+ unitronic w/ Franken turbo setup.
I've been running into some issues with the ride as of late, well, more than usual, and I can't seem to figure any of it out. First, the car kept overheating even when it wasn't warm outside after driving for only about 10-15mins. Took it to the shop, and they said that the fan & fan motor died on me and so they replaced that and the blower motor resistor, but then a month later I was back at the shop getting the fan replaced again. A month later, I was at another shop getting the fan switched, and not even two months later I was back at the original shop having the fan swapped out yet again because the previous one died. It's been a couple weeks now since the last fan being switched out and I'm starting to see some overheating issues yet again when the A/C isn't turned on and blasting. That's problem number 1.
Problem 2 would be all of the dash lights that randomly keep coming up; the traction control and ABS lights have been on for about three months now. Just last week the dash light for the airbag came on, and then today the light stays on for the door saying that it's open but the interior lights don't stay on like what's typical seen when the door is open. Also, every now and then when I start the car up the brake light will flash/beep a couple times then stay lit the whole time I'm driving around, but when I turn the car off then turn it back on again the brake light isn't lit...the airbag, ABS, traction, and door lights are still lit. I plugged a reader up to it, and no codes are showing and everything says it's checked out. Not to mention, the car has been idling real funny lately, usually sitting at 800rpm's then randomly dropped to around 400 to where the car almost dies off then it just shoots right back up.
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I replace my timing belt and water pump and my engine is now over heating. I notice it's only over heats when the ac is running and the engine is idling. When I start to drive the engine temp goes down.
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My sister has a 2004 gli 1.8t with 65k. The temperature gauge says its overheating, the cel is on, but the car appears to run fine, the fluid levels are appear to be fine, and you cant see any leaks. Her fiance thinks its water pump issues...
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I just drove the GLI from pa to myrtle beach for vacation. On the way back I noticed the temp was steadily rising while idling at a red light then at a gas station. Coolant level is fine. Thermostat, water pump, thermostat, and both temp sensors were recently replaced in the last two months.
So I know none of those things are a variable. Both fans never come on. I tried turning on the ac to get them to come on. But nothing. I read as much as I could on forums to find a solution but none applied to my specific problem.
Car is completely stock besides p flow intake. Has 153000 miles I'm pretty sure everything involving fan is original.
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Well I first had a slow leak, which was happening because I had a bad O-ring for my coolant temperature sensor. I replaced the O-ring, and I also replaced the whole coolant flange for good measure. After that I added some coolant, and started her up. And before i knew it, there was a pool of coolant under my car. It seems like the hose coming downward from the flange is swelling up (look at the pictures). But I have no clue what this hose is, or what it does.
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its cracked and its leaking i was tld its 210 dollars to replace it... what is the part number for this??? or is this not that bad of a deal?
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I think its a flange that connects to hoses, they want to charge me 140 to repair. would this be something i can do myself?
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I've never had a leak before in my anniversary and now all of a sudden I have a coolant leak. Once I start the car and run it for a short time and shut it off I lose a few ounces of coolant. I inspected under the hood and the coolant seems to be leaking onto my tranny. I am unsure where exactly it is coming from.
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Had it done at 87K years ago. Coolant light came on car had been rattling. Parked and coolant came leaking out. At 157K now was gonna replace belt at 167k, that's 80k since the last job. My guy says had I drove it further would be looking at a new 1.8t.
Does this sound about right to you since it's been 70k since that last timing water pump job. Why didn't the car overheat? Chipped at 40k with apr and very conservative driver. I suppose it just depends on too many variables why the job needs to be done 10k before I originally planned to do it.
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I replaced my timing belt, tensioner and water pump last weekend because I noticed I was leaking coolant from the water pump. The other day I popped my hood after driving and notice the reservoir bubbling a little bit because it sounded like the coolant was boiling and the line coming into the top of the reservoir felt hotter than normal. I opened the cap slowly and never heard any pressure release. I figured it was air in the line somewhere so I tried to work the air out. It sounded like the air came out and I took it for a drive and I finally heard pressure release after 3 different attempts. I opened the cap later when it was cool and noticed that the coolant was still at the original level.
Then the next day I was driving and came to a stop and noticed white smoke coming out when I gave it gas. It still drove fine though. I pulled over and opened the cap slowly but didn't hear any pressure release. I put in a little bit of radiator sealant and it seemed to do the trick.
The car has never overheated and there's no oil in the coolant or coolant in the oil. The heat also seems to be working correctly and my fans come.
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This is my second vw I've owned and now I own a 20th ae gti. Just the other day I got out of my car and smelled antifreeze. So I popped the hood and realized there was no coolant in the reservoir.. So I went to my dealership, put some in... well that obviously isn't my problem, because the next day it was gone. Again. This is on sunday so I can't do anything about it. I made an appt to drop it off tonight @ my volkswagen dealer. It's not leaking, not smoking or burning, and the temp gauge isn't moving at all.
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2003 Jetta Gli seems to have a very small coolant leak. The leak is small enough that I don't even notice a puddle on the ground the light on the dash told me it was low. It is the Vr6 motor. Also I don't know if this is the right forum for my car the title says 2004.5 Gli mine's an 03. If this is a big deal just let me know and I'll delete this post and go else where.
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Recently its been pretty cold here, and in the morning or when it sits for awhile i start her up and about 10secs after i start her the little "stop" light comes on and says "check coolant". so went through all that, checked the service manual and dont see any red flags. and if i were to turn it off and then turn it back on it wont show again... but still curious.
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