I have a 1997 vw jetta glx that needs the radiator replaced. I have a 1991 that i can get really really cheap but im not sure about the size difference. I dont have the 1997 radiator since I bought the car without it in. I dont wanna buy it then find out it wont fit right. So if anyone knows the size differnce plesae let me know. Or if i could swap the 91 radiator along with everything to mount it if that ones smaller. Thanks
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VW family engine thermostat is behind the lower coolant inlet . It will be either a plastic or aluminum housing.
To find it...open engine lid and look down at bottom of radiator. You will see a rubber hose from the base of the radiator to the engine at the left side looking in. The hose is attached to the housing that holds in the thermostat.
FYI. Never run a VW engine without a thermostat in place or overheating will occur ....really !
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...
You've lost engine coolant somewhere, and need to fill the engine back up with the VW special G12 coolant.
Then find the leak, which will be in one or more of the following places - Water hoses to heater core, including any other coolant carrying hoses in the engine compartment Radiator hoses Plastic manifold bolted to side of engine which is known to leak (have replaced on an '01 VW Beetle, and an '02 Jetta, both members of our family in the past few years.). Overflow reservoir cracked Radiator leak.
Reply back what you find. If the engine got too hot, you may need to have the thermostat replaced.
Check for a switch at lower part of rad. Should see a wire harness & plug on a sensor at bottom of rad. This sensor/switch also operates fan on/off according to coolant temperature. You may need to disconnect battery to get at it safely.