dodge 1500 truck 5.7 liter hemi

Asked by Guru5Z6CP Dec 26, 2017 at 10:43 AM about the 2007 Dodge RAM 1500 Laramie Quad Cab RWD

Question type: Maintenance & Repair

I drive every day except on weekends and I noticed
radiator coolant leaks only when I don't drive It
doesn't over heat or anything I took it to a shop
they did a pressure point test and could not find
any leakage what could cause it took leak when it
sits up

2 Answers

101,575

Might be the water pump. Remove the serpentine belt, then retest with pressure tester while turning the pump by hand. BTW system pressure does increase after shutting off an engine, so check degas/overflow bottle and overflow tube aren't expunging coolant after shutting engine off after driving. Wouldn't hurt to check the rad cap too.

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