1994 Chevrolet Cheyenne overheating issue

1994 CHEVROLET CHEYENNE
180,000 MILES • 4.3L • V6 • 4WD • AUTOMATIC
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ZFOWL
  • MEMBER
  • 1 POST
replaced thermostat because truck was not warming up now truck overheats. the thermo. is correct and i have replaced twice thinking one may have been bad out of the box. i was told there could be an "air bubble" in coolant system. if so how to correct this ?????
Mar 10, 2014 at 9:05 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
get the truck pressure checked for an internal leak first. then have radiator cap tested at same time as that may be bad. then check radiator for cold spots if you have any then the rad is bad as it should be the same temp all over. Make sure engine is off an dnot running when doing this. You can use your hand to feel for cold spots. I am assuming the reason the tstat was changed was for overheating to begin with.
Mar 10, 2014 at 9:24 AM
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