If you flush the cooling system with a water pump attached use the old water pump and not the new one to prevent impurities from contaminating the new pump. It fills the gap between the engine and the water pump in your vehicle.
Bmw E31 Coolant System Repair 1990 1999 8 Series M60 8
Install water pump gasket. Old gaskets and seals should be replaced by new ones. Dont apply sealant to an o ring or a dry seal. Make sure the bolt holes align. Do not force the pump on by striking the pump shaft. Then apply a dab of rtv sealant to the bolts and install the bolts finger tight to hold your new water pump in place. Only apply sealant if specifically recommended by the vehicle manufacturer.
Install the new water pump. Dont put it on too thick just enough to hold the gasket in place on the block or on the pump. When changing a water pump replace all old gaskets and seals with new ones. The water pump gasket is a simple sheet comprised of gasket paper rubber silicone metal felt and fiberglass or plastic polymer. Carefully follow installation instructions. Without the gasket the coolant flowing between the water pump and the engine block would undoubtedly leak out.
Use the gasket and put the gasket maker on either side of it. Double check that all the bolts are in place and in their. Put an even bead of sealant along the edge of the part but dont use too much sealant. Position the new pump straight onto the mounting surface of the engine block. Should leave you in good stead. It will do the same job and work just as well.
An improper seating damaged seal or misaligned gasket can mean the water pump is not operating efficiently or worse is under undue stress from misalignment.
Gallery of Install Water Pump Gasket
