Also note this. The lack of heat along with temp guage fluctuations are common symptoms of head gasket failure. Accompanied by coolant loss, they can also be symptoms of intake gasket failure, a problem you are guaranteed to have if your Venture is pre-2003 (I'm not sure in which modle year GM fixed it, but it was still a problem in 02). You are especially prone to the intake gasket problem if you operate in cold climates.
Sunday, January 15th, 2012 AT 10:35 PM