Quote:
Originally Posted by rscurtis
A higher pressure cap will not make the engine run cooler, it will only raise the boiling point of the cooling system. It also puts unnecessary stress on the hoses, heater core, and radiator. The coolant that's pouring on to the ground from a ruptured hose at 15 PSI is not cooling your engine at all.
I run my signature car and my 2003 Dodge at 7 PSI with no issues at all.
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Fifteen PSI! If you rupture hose from 15 psi it must have had some kind of syphillis bump on it for 5 years already!
If you raise boiling point of coolant, you can increase temperature of coolant which is desirable...
don't forget the temp of coolant is not equal throughout, if you see 90 C at head outlet, you might have more in localized spots, you don't want boiling in any point as cavitation can eat metal...