Question about 2001 Chevrolet Venture

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Van heating up and then cooling off?

When I am driving my 2001 Chevy Venture I notice that the temperature guage goes up about half way and then quickly will drop back down to completely cool. It will do this repeatidly while I am driving. I have also noticed that when I go to start it in the morning and just leave it running I will come out and the temperature guage will be half way up but no heat is coming out of the vents, but then when I start driving the temperature guage falls to a normal level at about 1/3 of the way up and heat begins to come out of the vents. Any idea what is going wrong?

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  • duanafry Dec 09, 2008

    I have the same problem with mine but now mine is overheating. The heat will quit and temp will shoot up. We can't find a solution to the problem.

  • BulletSponge
    BulletSponge Dec 09, 2008

    I have checked the coolant levels and everything is topped off.

  • BulletSponge
    BulletSponge Dec 09, 2008

    How do I go about stopping this from happening? How do I get rid of this air pocket?

  • BulletSponge
    BulletSponge Dec 09, 2008

    So I just unscrew these screws and then put antifreeze into the acutal radiator?

  • BulletSponge
    BulletSponge Dec 09, 2008

    Ok thank you very much!

  • Anonymous Jan 04, 2009

    van overheats rapidly. goes almost to the red than drops rapidly. have bled system via two bleed screws. the one on thermostat housing continues to "gurgle" air. also has missfire on #1 cylinder. cant find any leaks anywhere. changed thermostat " pain in the rear" and water pump. help! my van is an 1999 oldsmobile. identical to chevy venture.

  • duanafry May 11, 2010

    Thats not the problem because when it started my husband and father in law completely flushed my system and refilled it.

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Sounds like your low in coolant. this will cause an air pocket in engine and cause erratic temp readings/loss of heat check coolant in radiator when cold. and add

Posted on Dec 09, 2008

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  • TripleTauto
    TripleTauto Dec 09, 2008

    you have an air pocket system is not bled out right or you may have combustion leaking into system via a cracked head or gasket

  • TripleTauto
    TripleTauto Dec 09, 2008

    air pocket in the system

  • TripleTauto
    TripleTauto Dec 09, 2008

    their are two bleed screws one at upper hose connector and one on pipe by water pump. need too open these and fill radiator not the overflow jug but the radiator. if you are getting combustion pressure in system then have other issues and your not gonna get out

  • TripleTauto
    TripleTauto Dec 09, 2008

    yes just loosen them dont have to pull all way out.

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Posted on Dec 13, 2008

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