01 Montana heating problem

Tiny
J.STIEG
  • MEMBER
  • 2001 PONTIAC MONTANA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
I am having a problem with the heating in a 01 Pontiac Montana. The heat is cold most of the time. I took both of the hoses that went to the heater core and ran them in to a bowl, started the van and did not see any fluid come out. I replaced the water pump, the thermostat, and the radiator cap, still no heat. Am I haveing a circulation problem?
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Friday, December 17th, 2010 AT 5:29 PM

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Tiny
J.STIEG
  • MEMBER
I was working with the 01 montana and found out there was an air pocket in the engine. The water pump was not always under fluid, so I played around with bleeding the cooling system and it is now putting out heat again in the van. I think the lower plenum/intake gasget is leaking, and bringing air into the engine when it is cooling down. I put in stop leak and will wait and see what happens.
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Thursday, January 6th, 2011 AT 3:26 AM

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