You can garner your Jetta's thermostat working--and your Jetta warm--without paying a mechanic.
When the thermostat in your One thousand nine hundred ninety four Volkswagen Jetta fails, you'll observe lucky that it failed in the regulate position. This prevents your Jetta from overheating and causing thousands of dollars in engine damage, on the other hand it won't determine a plenty for concern you close in below zero weather. You don't annex to let your vehivle sit for a week until a mechanic can carry to it; pick up a replacement thermostat and abundant the engagement yourself.
Instructions
1. Set the Jetta's thermostat housing at the top of the radiator and disconnect the radiator inlet hose from the housing. This is done by loosening the band clamp that holds the hose to the housing with a screwdriver. Once the hose is loosened, pull it off the housing.
2. Remove the two bolts that authority the thermostat housing onto the intake manifold. Some radiator fluid Testament possible spill absent of the housing. This is bourgeois. To avoid burning yourself, this duty should be completed when the Jetta engine and coolant hold had portion of generation to refreshing.
3. Remove the experienced thermostat housing gasket. It should pull off in one quota, however it is not infrequent for Volkswagen to seal the gasket with PVC gasket maker. Provided this is the process with your Jetta, you Testament desideratum to scrape the out of date PVC gasket gone. Takings caution not to receive any PVC into the housing, which could end the fresh thermostat to malfunction.
4. Then monitor for leaks again
5. Insert the new thermostat, making sure it is oriented with the correct side facing up. Place the new thermostat housing gasket in place and bolt the top of the housing back onto the intake manifold with the bolts you took off earlier.
6. Push the radiator inlet hose back onto the thermostat housing and tighten the band clamp securely.
7. Start your Jetta's engine and monitor the inlet hose and gasket area for leaks. If the hose leaks, tighten the band clamp tighter. If the gasket area leaks, remove the housing and apply a new gasket and a small amount of PVC sealer. Remove the thermostat from the housing by pulling up on it. There are no bolts to clench it into place. It sits on a recessed lip machined into the inside of the intake manifold.
