when doing the pump, i glue the gasket to the pump, let it dry, smear the block with a little grease, check the head for corrosion or pitting, a little silicone lube, not sealer, same with the o ring for the heater pipe. hang the pump to the block with 2 bolts, attach the pipe, don't tighten. with the largest dowel you can find, tighter the better, lever the pump to the head. tighten the pump bolts, criss cross. tighten the heater pipe. hepu or graf for the pump and a 1336255 seal from the dealer, the others have ALWAYS given me trouble right away or far sooner then the pumps failure. this assumes it's a 2.3, not a 2.2. good luck, chuck.
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