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Overheating

Tiny
MARTIN SIREKIS
  • MEMBER
  • 2002 GMC ENVOY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
Overheating soon after starting to drive it. Replaced thermostat and there are no leaks throughout. There is oil in the spark plugs and I cleaned it out and replaced them. Also had a radiator flush. There is no build up on either the oil cap or the radiator cap. Still overheating.
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Monday, April 3rd, 2017 AT 4:43 PM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,877 POSTS
Hey Martin,

Even though there is no build up on the cap you could still have a blown head gasket, can you do a chemical check please?

https://www.2carpros.com/articles/head-gasket-blown-test

Please run this test and get back to us so we can continue helping you.

Best, Ken
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Thursday, April 6th, 2017 AT 4:29 PM
Tiny
PTEVENDALE
  • MEMBER
  • 3 POSTS
  • 2002 GMC ENVOY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 188,000 MILES
Engine Cooling problem
2002 GMC Envoy 6 cyl Four Wheel Drive Automatic 188000 miles

My car keeps over heating every couple of hours of driving. Each time the radiator is only a third of a gallon of coolant low. There are no leaks that I can find, the coolant doesn't seem to be coming out of the exhaust or the heater core. When it over heats it pushes the coolant into the overflow. Could it be a stuck thermostat?
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Thursday, April 6th, 2017 AT 4:30 PM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 12,958 POSTS
Martin - Have you been able to repair your vehicle or found the problem? Please post back as you may help others with your repair. Thank You.
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Friday, April 7th, 2017 AT 10:14 PM
Tiny
MACGYVER247
  • MEMBER
  • 1 POST
I had this problem with my car it was the head gasket it cost me $1,200.00 to have it fixed.
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Monday, May 14th, 2018 AT 11:24 AM

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