2003 Pontiac Grand Am car leaks antifreeze

2003 PONTIAC GRAND AM
116,600 MILES • 6 CYL • FWD • AUTOMATIC
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IRRHOPLACEABLE
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2003 Pontiac Grand Am is leaking antifreeze, plus temp gauge is going past 200. Took it to dealer, the only thing they saw was wrong was reservoir cap needed to be replaced and a bypass hose was leaking. Had all of that replaced, plus did a coolant flush, but still seeing a slight antifreeze leak. What do you think it is?
Oct 1, 2009 at 1:32 PM
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MMPRINCE4000
  • ✓Experienced Mechanic
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Did they perform a cooling system pressure test? This will isolate leak.
Jul 29, 2020 at 3:08 AM
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IRRHOPLACEABLE
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Did they perform a cooling system pressure test? This will isolate leak.

They performed a cooling system pressure test. Each time that was done, they could find nothing wrong. Sorry to get back to you so late. The message was in the spam box.
Jul 29, 2020 at 3:08 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Well it probably a hose leaking, or a leak at the thermostat housing. I am suprised a pressure test did not reveal anything.

You may have to get car to operating temp. and use inspection mirror to look at every hose and connection.
Jul 29, 2020 at 3:08 AM
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IRRHOPLACEABLE
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Ok. Will they do that at the dealership?
Jul 29, 2020 at 3:08 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Yes, but remember they charge by the hour, usually $85-125 and up.
Jul 29, 2020 at 3:08 AM
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