I changed the water pump, but it still overheats

2002 CHEVROLET ASTRO
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CEPEDA_PARENTS
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  • 1 POST
I have to turn on heater to keep temperature down. What could be the problem? I've tried flushing the radiator, repairing a hairline crack on the radiator.
Feb 25, 2012 at 9:07 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Thermostat okay-if so could be airlock-try bleeding the cooling system don't work block and pressure test it, might have a blown head gasket
Feb 25, 2012 at 9:11 PM
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