Question about 1993 Volkswagen Jetta

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93 Jetta is overheating. Changed the thermostat and the pump is working. On idle the temp stays down, but while driving rises fast.

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  • Cortez77 May 13, 2010

    I've got the fan running on a bypass right now and the ac running but it's still rising. What is supposed to turn on the fan?

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My 93 1.8lt gas jetta over heats when stop while driving it goes down. whats wrong with my jetta

Posted on Aug 13, 2010

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  • Volkswagen Master
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Check to make sure there is no air in the cooling system,and make sure the cooling fans are working.The cooling fans should come on,on there own,and go off on there own,without the ac or defrost on,make sure they are off.

Posted on May 13, 2010

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Posted on Jan 02, 2017

hightower680
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SOURCE: 2005 vw jetta gli overheating at above idle

Hi, Carson. Have you check your radiator for blockage? Or the car's cylinderhead gasket has blown, which will put pressure in your water system which in turn overheats the engine.

Posted on May 18, 2009

  • 534 Answers

SOURCE: 2000 jetta overheating. changed thermostat and

I doubt that the water pump would be faulty:- go through this checklist first. I assume motor tune or other mechanical condition is not causing the problem.
When engine running, ensure no engine combustion gas bubbles in coolant resevoir (if so, the head gasket is blown).

Check radiator cooling fans are operating ok (as required when car warms up) - if not check
1) fuse,
2) relay operation,
3) heat sensor switch.

Check for collapsing (soft) coolant hose on suction side of waterpump when engine revs above idle.
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary,
Check radiator cooling core is not blocked internally or externally.

Posted on Sep 29, 2009

  • 80 Answers

SOURCE: i changed the thermostat on my 2004 jetta 2.0L and

Hi, could be the head gasket, have a compression test done to determine pressures etc, with the engine running see if you can smell exhaust fumes coming out of the radiator filler, good luck.

Posted on Feb 24, 2010

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