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Coolant problem 2000 VW Jetta Just fixed crack in radiator and now the coolant is bubbling over temp gauge is reading good in the middle?

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Very possible the thermostat is bad, especially if you used a sealant before fixing the radiator. A blocked thermostat would prevent coolant from going to and from the reservoir, causing it to back up.

Posted on Sep 06, 2009

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2003 vw 18.t temp lights goes on but temp gauges read normal


If your coolant overflow is bubbling then regardless of what your gauge says you are having overheating issues. If your coolant is missing with no aparent leaks then you need to check your oil for a milky consistency and apearance which would most likely point to a blown head gasket. This would also explain overheating. Hope this helps

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2005 impala temp gauge not working light says overheating replaced thermostat temp sensor and bleed system. Any thoughts


Remove the radiator cap, let the car run. When the car is at temp. and the thermostat opens you should see coolant circulating in the radiator. If there is coolant flow and you know for a fact that the engine is not actually hot,(check with a laser thermometer: point the laser at the engine block and read temp.) then you more than likely have a problem with the coolant temp. sensor. Check the connections, replace the sensor.
If you do not see coolant circulating in the radiator then you have an issue with either a thermostat, water pump or possibly a blockage or at worst a problem in the head. Check the overflow with the car running, if it is steadily "blowing bubbles" in the over flow (like someone blowing bubbles into a cup with a straw) then there is compression leaking into the cooling system and there is a problem with the heads. Remove the heads and have them checked for cracks at a machine shop.
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My 2000 chrysler voyager radiator fluid bubbles in radiator overflow tank evn when cold nd when turning over. I just had head gasket replaced whats going on


I suspect a crack in the head or block. The cooling system is suppose to be closed so any air has to be coming from somewhere - if the head gasket is good then the air is likely to be coming from a crack. A pressure test will confirm if your system is not air tight. That is if you are seeing bubbles in the radiator water if you just mean you are losing water through the overflow then it might just be the radiator cap needs replacing as it is not sealing the system when it gets hot.

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Temp Sensor in my VW 2002 Jetta was replaced due to a Check Engine light and a code noting this needed to be done. Once complete my car began heating up. Coolant light came on and my temp gauge pegged in...


If your radiator fans are not running at all than I would check over the wires your disconnected when rpolacing the temp sensor. Make sure they are fully connected. That would be the first thing I would check.

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97 ve jetta temp gauge used to read just left of the middle mark, now reading just to the right of the middle mark. how come?


Oh no, check the upper radiator hose there it will lead you to the thermostat. Do you see coolant leaks.They have a tendency to always leak now look at the white plastic radiator is it at the full line if not you are low with fluid. just fill it up.and take care of the leak

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Need exact location and picture of coolant temp sensor on tdi vw jetta 2004 please Thanks


The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:

1. ECT sensor 1 placed on cylinder head:

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2. ECT sensor 2 placed on the left bottom side of the radiator:

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volks 2001 1.8 T wolfsburgh . overheats to dangerous levels just after 2-3 min. of driving . let it cooldown an hour , drove again same thing 2-3 min. noticed fans not working , tried to crank the heaters inside , mostly cold air come in. easy fix or not?

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Code P2185 2005 VW Jetta 2.5 5cyl


There are two coolant temp sensors. One by the oil filler tube and one near the bottom radiator hose near the radiator.
When you flushed the coolant did you replace with VW rated G12 coloant? Very Important! - You can't use over the counter coolant - it'll cause sludge in your system. You have to use G12...

Hope this helps!
Please rate/vote! Thanx!

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Do I need to burp this system 97 jetta


well bleeding the air out of the coolant system is pretty easy to do at home and will cost you very little to nothing. You can do it 2 ways and it should work either way. first of all you have to make sure that your radiator cap is higher than the point where your upper radiator hose goes into your engine. If it's not follow you upper radiator hose to where it goes into the engine and there should be a little bleed valve there it's prolly a 10mm bolt looking thingy. open the radiator cap or crack open the bleed valve, start your engine and let the coolant travel around for awhile to work all the air out. just keep an eye on the engine temp. let it run for about 10 minutes or so and close it up and see if that helped any.

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