1997 Chevy Truck replacing leaking heater cores

1997 CHEVROLET TRUCK
168,000 MILES • V8 • 2WD • AUTOMATIC
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UNCLE FLOYD
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  • 1 POST
have replaced heater core twice in the last two months. Have run ground wire to core for electrolyst, but hear air in system even after letting it run for 20 minutes with the radiator cap off. Thlinking I need to change heater core manufucturer?
May 7, 2010 at 7:34 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
see i f you have air bleeds for the cooling system on the inlet or thermostat housing. if you do then leave cap on and bleed the air out while running. if it still does it replace the rad cap as it may be bad and it's a cheap fix.
May 8, 2010 at 8:45 PM
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