Question about 1997 Volkswagen Jetta
Hi, my dad has a '97 Jetta that has been overheating off and on over the the last few years. He says it seems to get worse during the winter. He he fills the coolant to the very top, almost to overflowing, it'll stop overheating for a few days. He's had 2 radiator flushes and there hasn't been any change. The car also hasn't had AC in probably about 10 years.
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Posted on Jan 02, 2017
Run the engine and look at the header tank , is there lots of air bubbles coming back out of the water if is then the head gasket may have split and that is down to either a can of Radweld or a strip down repair
If the radiator is not uniformly hot them I would go for that as your problem
Normal operation is that the engine starts the thermostat is closed , engine block heats up and opens water starts to circulate around the block
So to check that you need to fill the radiator with cold water run it for a few minutes check the bottom hose it should be cold
The stat opens and the bottom hose should get hot as the water from the block is pumped into the radiator for cooling.
The radiator should get hot all over and the cooling fan should kick in when the sensor hits the over limit stop.
If that does not happen then get someone to remove the stat altogether (It is only there to get the engine block warm quickly in cold regions )
In which case the bottom hose should go from cold to warm to hot
Posted on Jun 23, 2009
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