Water dripps out of the bottom bolt on the waterpump rear cover, replaced the gasket with a G.M. part and it still leaks. as the cover has only four bolts i am wondering if it is warped. any suggestions . jim
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Re: water leak at water pump rear cover
The use of silicon sealer on both the gaket and the threads of the bolts is important Not adding silicon sealer to bolt threads and shank sounds like the likliest cause of your fault unless it only appears to be coming from the bolt hole and in fact leaking from another source.
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Sounds to me like the shaft seal has failed on your water pump and you need to replace the pump, theres usually a tiny hole either at the bottom of the water pump or at the top of the pump its called the weep hole, when coolant comes out of this hole it means the internal shaft seals of the pump have failed and it requires replacement of the pump, now if the coolant is coming out of where the pump bolts onto the engine block you propbably only need the waterpump to block gasket to fix the leak, check and see exactly where the coolant is coming out from so you can be sure exactly what you need to replace....
Not too bad,you have to remove fan,to get the water pump mounting bolts.take off the belt,remove the pump.Some people remove the radiator for more room ,this no big deal,just remove the top 2 bolts,remove upper,lower hoses,pull the fan cover off.You don't put RTV on gasket,also there's an small o ring that has to be replace,behind the pump.
To access and remove the waterpump, the powersteer bracket has to be removed completely. To do this, the rear camshaft drive pulley must be removed (need a tool to hold pulley, bolt tight) and then the thin sheetmetal shield behind the pulley. This allows access to the lower powersteer bracket bolts.
Removal of the engine mount is also required to perform timing belt replacement. It also helps to increase your access room too.
I would recommend you replace the waterpump why you are there as they have a tendancy to fail at around 140000 km's.
you only have one option...take the pump back for another one with new gaskets and use gasket sealer, making sure all mating surfaces are real clean before assembly. Could there be a small hairline crank in the rear part that you don't see?
Maybe replace the entire assembly
Solenoid pack leaking, Cooler Lines to Radiator leaking, Timing cover leaking, They suggest changing the water pump at the same time as the lower rad hose, timing chain, and valve cover gaskets. This is because it either looks like the water pump will die soon, preventative measures, or the shop is trying to rip you off for an hours labor.
Either way, I would suggest taking it to a mechanic, unless you're a bit of a handy man.