1995 Chevrolet Cheyenne Changed Thermostat Yesterday Because Increase Decrease

1995 CHEVROLET CHEYENNE
90,000 MILES
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i changed my thermostat yesterday,because of the increase and decrease of temperature from the engine.now the temperature will not rise and heat is very low.is it a bad thermostat or water pump?

Feb 17, 2013 at 7:07 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Id want to double check your temp gage. Do the heater hoses get hot? You may need to flush the heater core? Another possible issue is a temp door problem, under the dash.

Take the return heater hose loose from engine, bump the starter, any coolant flow? Don't start the vehicle.
Feb 17, 2013 at 7:44 AM
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