To replace a water pump gasket:
- Remove the water pump. clean all remnants of the old gasket off of the engine. be careful not to gouge aluminum parts.
- A water pump often has a steel plate bolted to its back. The plate gasket sometimes dries out during shipping. If this happens the bolts will be loose, causing a leak.
- Before installing a new pump, it is a good idea to remove the bolts and cement both sides of the plate gasket.
- When replacing a pump, be sure that all gasket material is thoroughly removed and that any o-rings, hoses, or gaskets are not damaged or forced during assembly. Be sure that the screws that hold the cover on the back of the pump are tight.
- Use sealer to glue the gasket to the water pump. Sometimes a chemical gasket is used.
- Be sure that the surfaces of the pump and block have been cleaned of all oil and coolant so that the chemical can stick.
- Paper gaskets are generally the only gaskets, other than retorqueable head gaskets, that require the use of a sealer. Paper gaskets are found on timing covers, water pumps, water outlets, fuel pumps, and some carburetors. Several manufacturers make tool sets for cutting the holes in paper gaskets.
- When replacing a damaged gasket, gasket paper can be purchased in sheets. A gasket can be roughed out by holding the paper against the part and tapping on it with a ball-peen hammer.