Question about 1993 Volkswagen Jetta

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1993 jetta 111 series, over heating.

How do I replace the thermostat.

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Well here it is, hope u have a few hours (or a couple days, depending on ur mechanical skills)
remove the alternator and belt, remove the support bracket for the alternator and remove the water pump. The water pump is a big assembly and is also the support bracket for the alternator. This is a pretty hard job to do and i suggest u have it done in a garage because the 2 top blots holding the water pump are very hard to get to.

While ur at it replace the water pump at same time, this is EXTREMELY RECOMENDED.

Posted on Nov 20, 2008


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1999 VW Jetta, it overheats even after I replaced the thermostat and the plastic housing on the drivers side of the engine (it was cracked). I let it run with the res. tank open because I thought it might...

With the symptoms you describe, coolant is not circulating through the system. Your first move to replace the thermostat was good. My next move would be to replace the water pump. Good luck.

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Yup. Drain coolant, remove belts and the upper timing belt cover. The easiest way is to remove the water pump and housing from the engine and do the rest on the bench. The thermostat and housing will come with it. Make sure you use a NEW gasket on the water pump and a NEW O-ring for the thermostat. Never reuse these parts. DON'T use silicone anywhere in there. When you put it back together the water pump should be torqued at 89 inch-pounds to the housing and the pulley bolts are 15 ft-lbs. The thermostat housing is also torqued at 89 inch-pounds. The thermostat is real easy on the bench, not so easy in the car (hint,hint).
It may be easier and faster to fill the block with coolant through the top rad hose and then top up at the bottle. Don't be surprised if it takes a few days to get all the air out of the system. Hope this helps.

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