water pump replacement on 1990 Chevrolet 2500 Pickup

Is it better to use the gasket supplied when replacing a water pump or just use permatex gasket in a tube. Or should a smalll amount be applied to one side of the gasket to hold it in place while mounting the new water pump.

by in Mesa, AZ on May 31, 2009
2 answers
ANSWER by on May 31, 2009
On a truck of this vintage, I would make sure that the mounting area of the water pump is smooth and free of any old gasket material or corrosion. I would create a thin layer of the silicone gasket material on both sides of the gasket so that the pump can really seal. So. I coat the Engine with a thin coat and then put on the gasket to the engine and then I coat the pump and then put it CAREFULLY in place on the motor and use a couple of bolts to snug it up and then I check the seal and fit of the pump, the gasket and the sealant. Then I put in all the rest of the bolts and torque all of them properly. THEN I fill the cooling system with coolant and pressure check it to make sure my work is 'squared away' and that the there is no seepage of coolant.
ANSWER by on March 28, 2010
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