I had a leak in my coolant system and it seemed to be coming from the gasket behind the water pump housing. To make a long story short, I replaced the suspicious gasket and the water pump (and its gasket) after taking the housing off.

Now I am trying to do a pressure test before I refill the system. I cannot find the pressure I should pump the system up to and I am searching for it. Does anyone know offhand? Even at 5 psi I saw a leak previously, so that pressure may suffice, but I don't want to overpressurize and cause some more damage...

Thank you

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dannyf
1984 Mercedes 300 SD 214 K miles. Runs on WVO ~ 22 mpg over 8 K on WVO
1997 VW Passat TDI 156 K miles. Uses biodiesel and diesel. ~ 41 mpg
1996 Mercury Villager gasser. ~ 20 mpg