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Re: 1993 jetta 111 series, over heating.
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.
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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.
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.
Hello. The thermostat is located on the pass side of the engine down below right next to the lower rad hose. If you have a/c you will have to move the pump away. I just changed mine in my 1993 Jetta the other day. Good luck!