i have a 99 pontiac grand prix that has a leak i can not identify the part. 3.8l directly below the pulleys and parellel to the frame. there are four factory holes in its case and it leaks from there

Asked by Apr 04, 2015 at 09:51 PM about the 1999 Pontiac Grand Prix 4 Dr SE Sedan

Question type: Maintenance & Repair

2 Answers

71,775

Sounds like it could be the serpentine belt tensioner. Coolant runs through the tensioner on it's way to the heater core. The plastic elbows that plug into the tensioner are also prone to leak. Replace them with the metal ones. They're much better. HTH. -Jim

Also it could be a leak from the overflow tank. That's what my 99' Grand Prix does. I have to make sure I put water in every couple of days.

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