Golf IV / Jetta IV :: 2003 - Overheating / Oil In Expansion Tank
Mar 17, 2016
I recently bought a 2003 VW jetta 1.8T with 150,000 miles on it. After the purchase I got about 20 miles down the road and it overheated. I noticed there was oil in the expansion tank. I replaced the head and head gasket on the vehicle. As i was taking everything off I noticed that there was green coolant in the car. WhenI took the head off the pistons were glazed over and a lot of things were charred.
So I cleaned everything and put the new head and gasket on. After everything i cleaned the expansion tank of the oil and put new coolant in. After I drove it around for a little bit and everything seemed fine and there was no oil mixing with coolant. So I left got another 20 miles down the road and it started steaming and the overheated light came on. I checked the engine and there was no oil in the expansion take but the coolant was just pulsing it wasn't a constant flow.
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2003 Golf GTI Turbo... New to VW, I'm a jeep guy and bought a GTI for my wife to try rally cross in. It had some problems that I knew about when I bought it, had to replace CV shafts, control arms, fix broken trans mount, etc. I'm on to the last piece of the puzzle now.
The expansion joint on the downpipe from the turbo is basically exploded. Not a big deal, just buy a new downpipe and biky everything together right? Not so much. Bought one the other day, it showed up and has 3 bolts on turbo side, mine has 4.
When I look at the other stock turbo downpipes, it looks like they have 3 bolts as well. What's going on? Did the previous owner put a different turbo on this? I just need the damn downpipe, but can't figure out which one to order.
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I have an 04 gti 1.8t and last night it started over heating. I pulled over and checked the coolant and the oil but everything looked good. I let it cool down and drove it home. When I popped the hood there was a little steam coming from the coolant overflow tank but I saw no leaking. I decided to vent the pressure off the system and then I got a little drip on the passenger side close to where the inter cooler is. I can't pinpoint the leak though.
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I have a 02 cavalier 2.2 it just started leAking coolant when in a drive thru. Steam started coming up from hood. When I looked under the hood the expansion tank was hissing and it looked like the antifreeze was coming out of the overflow tube at the top of the tank. What should I do? It is sitting still at the parking lot
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Changed coolant expansion tank and coolant, engine lite came on. Scanner says coolant problems. What can it be. ECU is not recognizing new tank.
Car passat 1.8, M/T, 05, coolant was changed with the pink coolant from dealership, system was flushed and bleeded. Car is NOT overheating, temperature is showing as usual.
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Last week during a hot/long day on the road, my engine temp gauge started fluctuating between 1/2 and almost 7/8 on the gauge. The weird thing was that it was fairly stable most of the time, but every 10 minutes or so, it would heat up, and spend bout 15 seconds at the high mark before dropping down again. It didn't seem to be related to rpm, A/C operation, or driving intensity. When I got home, and let it cool down, I checked the coolant level. I couldn't see any coolant in the radiator, but the expansion tank was nearly full. I guess the low coolant level can explain the symptoms above, but I can't figure out what is happening to the coolant.
I took the car to a mechanic and had a pressure test, which didn't show any leakage. I had a new thermostat and radiator cap installed. They flushed the system, and tested the hose between the expansion tank and radiator. After driving the car home, the coolant in the radiator had already dropped to the point where I couldn't see it, and the expansion tank was 3/4 full. Now, I am planning to keep track of the levels of both reservoirs (and refilling the radiator of course) to see if the fluid is leaking, or if it is just not returning from the expansion tank. Hopefully this bit of knowledge should locate the problem.
The successful pressure test leads me to believe that it isn't leaking externally. However, I'm wondering if there is a small enough leak that wouldn't be detected by the pressure test, but is significant enough that it would allow air in when the engine cools instead of pulling the fluid back from the expansion tank.
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Have a 2002 V6 in the family that's losing coolant at a rate of about an expansion tank every 3 -4 weeks.
I have searched all around with a flashlight, don't see any signs of coolant residue near the radiator, expansion tank or cap, water pump, or heater core connections. Heater core does not smell like coolant. Exhaust does not smell sweet or does not steam once the car is warmed up.
I pressure tested the cooling system on up to 18-20 PSI and still can't find any evidence of anything leaking out anywhere.
I'm going to change the upper and lower radiator hoses this weekend in the thought that maybe it's a pinhole leak once hot and under pressure (I pressure tested cold). Any common things I'm missing where it may leak?
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2007, 4.0L, Explorer, 113,000 mi. Week ago noticed coolant expansion tank empty while hot and cold. Looked inside ex. tank and looked like it had not seen any action in a while. Looked inside radiator and coolant level was about 1 inch to 1.5 inches below bottom of rad. cap would be...approx. level with rad. seam, where black plastic top of rad. attaches to metal portion of rad. I filled expan. tank to "cold fill" line. Kept an eye on it while doing light, around town driving. The expan. tank level (cold-fill) didn't change.
Friday, my wife returned from work (30 mi., interstate drive). After being parked for 45 mins, went out to find fluid puddle at very front of car. Expansion tank was empty. Looked in radiator, and it was about one inch to inch and a half below bottom of rad cap...about level with rad seam, where the black plastic top is attached to metal. I topped off the rad. this time, along with filling expan. tank to cold-fill line. Turn car on, and after warming up coolant starting coming out from what appeared to be the seam at the top of the rad., where the black plastic portion meets the metal part of the rad.
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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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I have a Toyota Corolla 2003. I need to replace the expansion valve and the evaporator of the AC. I have been told I have to remove the whole dash to do that. Is that true? and if so, where I can find a video or a step by step guide in how to do that?
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This has been happening for awhile now, but whenever the gas gets to 1/4 tank and below (about 2 ticks from the red tick on the gauge) the car will stall for about 3 seconds then come back to life. If it happens while I'm stopped it will completely die and I'll have to restart it.
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I have a 2.0. Custom gt28 turbo project. Been up and running for awhile now. Took it on a 4 hr trip home and drove it back.
All of a sudden after the holidays it started to overheat and I had no heat. It will not overheat when idling. I replaced the thermostat recently. Lower hose gets warm when it opens. I replaced the green top sensor. I have done a wire tuck etc and I am running a closed coolant system. I believe I have gotten the air out of the system.
It will idle all day at 190. But as soon as I drive and accelerate hard or go over 50 mph it overheats and will not cool off unless I pull over and turn the car off. It will steam as if it's losing coolant somewhere but I think it's at the cap (too much pressure?).
I am thinking water pump but I am not sure. I got the car with 124k miles I'm at 127000. I was told timing was done at 90 could the pump be failing already? Also when it overheats I get a cel for misfire is that normal?
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My 2002 Jetta VR6 is overheating. The car only overheats when the car is not mobile. If I get stuck in straffic or just let it idle it will over heat. What could it be?
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Ok I have an automatic 02 gti..the other night as I was driving home it started to overheat And fast..I had to stop about four times to get home so it can cool down a bit..the next morning I went to check for leaks but I didn't have any and my coolant level was good..I turned the car on and let it heat up and I noticed the fan didn't kick on..is the fan not turning on a good sign that it is bad? I ordered a timing belt kit from ecs which came with a new water pump and thermostat but I didn't get to switch everything out in time and now im stuck with a overheated engine..the only thing I did change was the coolant temp. Sensor because it was the easiest thing to change.
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As the title says, car is overheating. Car gets to 190F within a couple miles drive. Temperature fluctuates between 190F and 225F.
Water pump was replaced ~2 months ago. Was not overheating prior. Temp reached 190F and stayed. Currently has the "black top" coolant temp sensor.
I noticed the coolant fans are not running after I turn the ignition off. This time of year they would usually be running after turning the engine off. If car is overheated and with AC off the fans do not run while engine is running.
I used the guide below to try diagnosing the cause: [URL] ....
Remember both fans should come on in slow speed any time the key is on and the AC is on - if the temperature is above about 32 F (0 C). Both fans run with key on and AC on
S180 (fuse 8, 30 amps, green plastic, above battery) must be good for slow speed operation.
Fuse and holder look good: no melting, no discoloration.
S164 (fuse 3, 40 amps, metal strip, above battery) must be good for fast speed operation.
fuse looks good: unbroken.
To ensure the AC circuits and the Fan Control Module has power check:
Fuse 5 on the cabin fuse panel.
Fuse 16 on the cabin fuse panel. When this fuse is blown the radiator fans will often run unexpectedly.
Fuse 25 on the cabin fuse panel.
All three fuses look good: unbroken
For the first test of the slow speed fans from the radiator thermoswitch have the key off.....Both fans should run in slow speed.
Passed test: both fans run slow
The second test is for the fast speed fans, key on, AC off.... Both fans should run in fast speed.
Passed test: both fans run fast
If the fans run in the tests above, then you should be good to go. No further tests are needed.
If you have been seeing high coolant temperatures and the fans have not been running, then you may need a new thermoswitch.
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So my 2002 Jetta 1.8t is overheating. The water pump was bad. Replaced. The thermostat. Replaced. Radiator. Replaced. Radiator cap. Replaced. We're running out of things to replace! I'm ready to go to a junk yard and get a new block! We've tried about 100 magical "ways to burp it" with no luck. We even tried running it without a thermostat. Without the heater core. EVERYTHING.
The car runs at operating temperature at 4 RPM. But when we take it for a drive, it overheats. There's no heat with the thermostat in unless you rev it at the high RPMs. As for the hoses, top is hot, bottom gets hot. As for the car, it runs beautifully. It gives no codes. No smoke either. Nothing in the oil, nothing in the coolant so I don't think it's the head. It just overheats. This has been FAR too long.
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My 2002 VW Jetta GLS 1.8T 5-Speed is over heating
Car is still over heating after replacing the following:
- Head gasket
- Coolant fan module
- Geba Metal Prop Water pump
- Full timing belt kit
- coolant fan switch in Radiator
- Bleed the system of all air blow hot air
So Driving the car around town is ok, doesn't over heat, but as soon as I take it on a highway it over heats. I drove it 50 kms out of the city and it over heated, let it cool down and added water. got it back home. Oil light flashed on as I pulled into driveway, turned it off right away. no external oil leaks. Checked coolant, Oil in coolant. also the coolant was boiling, the level was raising up and lowering. I have been reading the forums for a few hours and the oil in the coolant sounds like the oil cooler gasket. Ok so the fans are running and it still over heats. The old metal propeller water pump was very hard to turn so I replaced it with a Geba Metal water pump. no leaks at water pump. Could it be possible that the Oil cooler was causing air to leak into the cooling system causing the coolant to boil? And then when the oil cooler "o-ring" finally failed it dumped oil into the coolant?
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1.8 jetta... Seems to do this when at idle only on occasions it goes above 190F. Waterpump was changed about 5k ago so I'm sure its not that. Thermostat still needs to be changed. It seems like if I turn the heat on it stays at 190F.
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Mk4 Jetta Gli 1.8t , car was over heating only when sitting 5+ minutes at idle, mechanic said the big fan needed replaced so he replaced it. Car still over heated so i replaced the coolant with G13. It hasn't over heated yet but got in the car this morning and the coolant light started flashing and car was telling me to STOP the car. Checked out the coolant and it was on the low side. What it may be? Leak somewhere? Bad thermostat or water pump gone bad? Timing belt and water pump were done when i bought the car when it had less than 50k miles, car now has 99k miles on it.
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Once I reach highway speeds on cruise control, I would feel my car to start slowing down, then a second or two later the car jerks and starts accelerating again. A few times I beat it to the punch and pressed the clutch pedal. The RPMs just dropped and the car died. This happens ONLY after a quarter tank of gas is left. I get no lights, No check engine; nothing... Where should I start looking. BTW I have a 2002 Jetta GLI VR6 24V.
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Engine will overheat unless I turn the AC on. The engine fan only operates with the ac on it seems.
Will not overheat unless in traffic for a while.
Would it be radiator thermo switch or the Fan Control Module?
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