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Danny, VW Mechanic
Category: VW
Satisfied Customers: 4004
Experience:  ASE Master Certified with L1 Certification, Volkswagen Certified, VW and Audi repair shop owner
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99 vw jetta: 2.0l is overheating has new thermostat..hose..radiator

Resolved Question:

99 vw jetta 2.0l is overheating has new thermostat, and fan switch,    fans never come on i verified power and they work properly, upper hose is hot hot and bottom cold is it the radiator
Submitted: 7 years ago.
Category: VW
Expert:  Danny replied 7 years ago.

If you have this body style Jetta shown here

Then you have a bad waterpump most likely. Remove the small upper coolant bottle hose and hold it over the open bottle while a friend starts the car and holds the RPM at 2000. If you don't have a good steady flow from that hose at all times then the waterpump is bad and needs to be replaced. It's run by the timing belt, I'd replace that too while you're at it.

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