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coolant leak on a 3.8

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dauntejoel

New member
Hey guys I've got a 2008 grand prix with the 3.8 v6. It has 130xxx miles on it. It has a coolant leak and im not for sure where. I replaced the two plastic elbows on the tensioner, I put a new water pump and a new t-stat. When I had it all apart I was looking around the manifold and it wasn't wet the oil isnt milky either. The spot that I have noticed is wet is behind the the motor, the side where the exhaust manifold goes to the exhaust pipe. Im stumped because from what I can see and feel on the motor I cant find a spot. Any help would be appreciated, thanks.
 


Check the ends of your heater hoses. Just feel them. You will likely find the end at the tensioner is leaking. Likely it's an o-ring where the fitting goes into the tensioner.
 
go buy a coolant pressure tester, or rent one. pump up the rad with it, look for a leak to appear.

lims dont really piss coolant. the bolts can seep coolant,

get under the car look up to the freeze out plugs in the block, one of them may have rotted out on you.
 
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