Join Date: Aug 2009
Location: Plano, Texas
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Hi, looking for info on small coolant leak on 2012 Impala 3.6 vvt ...noticed coolant leaking somewhere above and behind PS pump...noticed this when wheel was off on right side. I assume the head gasket is leaking....? anyone else seen this?
144k miles...no major issues to date...besides this
I doubt it's a head gasket. The serpentine belt will sling coolant all over the place, so it could be leaking well away from the location spotted.
As 12_lt, indicated, you need to pressure test it and inspect closely looking for leaks. The 3.6 LFX motors have a very good reputation - they're not known for leaking. But, since you're on the accessory end of the motor, I'd be looking at the water pump, since, among cooling system components, that's a more common failure point.
[Edit]Here's some more info on cooling system pressure testing tools
Last edited by plano-doug; 10-08-2019 at 12:37 PM.