Originally Posted by
Ron
I'm thinking we're not all on the same page...what we are saying is:
1. Paper gaskets (used between pump and engine) should never leak, ever!
2. The pump seal (used between the pump housing and pump shaft) may leak air but shouldn't leak coolant. (Especially true if you have let it run a few minutes to seat in, which is not normally required.)
3. If the coolant, engine, and ambient air temps are the same when you fill the system then pressure it at or below the caps rate, it may drop a few psi the first few seconds (hose stretch etc), then hold solid for at least 2 minutes.
Detailed instructions attached below. (Note it even says to wet the cap when you test it.)