2003 Pontiac Grand Am coolant problem

180,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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JOHNNY PUTT
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  • 1 POST
I have a coolent leak I can't find out where it's coming from. I've replaced my thermostat.
And water pump The coolant leak is not visible I checked oil can't see any coolant don't see anything on the ground heater is also blowing cold air on and off so this morning I filled up the coolant and car drove best kind park it and half hour go to get in it and coolant light be on I poped the hood and seen coolant over flowing out of the hose on top of the coolant case I brought to A mechanic and did a pressure test he said it was losing 2 1/2pounds per half hour he said it didn't look like the head gasket but didn't know what was the problem
Jan 11, 2015 at 12:58 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
if you can't see the coolant leaking then it's either a intake gasket leaking internally or a head gasket.
Jul 29, 2020 at 3:08 AM
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JOHNNYT73
  • ✓Experienced Mechanic
  • 924 POSTS
These engines are well known for manifold gasket leaks.
Jul 29, 2020 at 3:08 AM
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