1992 GMC 1500 Pickup Q&A
1992 GMC 1500 Pickup Question: to long to idle down when first started then engine stalls + overheats.
a water leak prompted replacement of the intake gaskets which caused a crack in the manifold. repair was done and again replaced on engine. I visually watched a Diagnostic done and no problems were shown. since then problems like over heating after 2 new thermostats. Shut down and wait 15 min or so and temp drops to 180. I know it is over heating when the overflow tank fills so heat gauge is functioning. This AM (about 1 week after the manifold work) I start engine and same thing with the temp but this time engine does not want to idle down in the normal time of running and when it does (around 45C)it stalls dead. TPS is new, most vacuum hoses replaced, EGR valve replaced at the same time as the manifold work, but should I be able to turn the valve while it is attached to the manifold? After 19 years of service one can expect "some problems" but this is going in very odd directions all at the same time. Can someone help? - donaldbell
sounds like a blown head gasket. you need a shop to do a leak down test to verify. if the intake cracked from overheat, the heads may have also cracked. Roy - mastertech6371