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Mechanical / Re: Coolant leak how to fix
« Last post by 5th T/A on Today at 08:46:15 AM »Years ago I installed many Pontiac intakes without leaking problems pretty much the same as Brian mentioned, having the intake to head bolts started, then draw the intake forward with the single water pump bolt. I might have used some Permatex aviation formagasket on the O-ring doughnut. I read somewhere there were problems with some of the new doughnuts not being thick enough. Not confirmed.
I also like to use a cooling system pressure tester on the system putting about 15 PSI while checking for leaks. This allows leak testing without topping off the cooling system or running the engine. I bought mine forty years ago. Most auto parts stores will lend one for free.
I also like to use a cooling system pressure tester on the system putting about 15 PSI while checking for leaks. This allows leak testing without topping off the cooling system or running the engine. I bought mine forty years ago. Most auto parts stores will lend one for free.