Quote:
Originally Posted by JWL
Be certain the cap is actually sealing in the throat of the filler neck. Maybe apply pressure at the connection to the overflow tank to determine viability?
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I have a coolant system pressure tester which includes a simulated filler neck to pressure test the rad cap. I tested it yesterday it held to 7 lbs, released at 7.5 lbs. I checked the lower sealing surface on the radiator filler neck. It is nice and flat, and was.050" shallower than the testers neck (so should seal with a slightly higher pressure on the rubber seal). Thanks for your reply.