SOURCE: replaced intake gaskets.ran fine before. burns antifreeze now
Sounds like the gasket is not sealing correctly, or you have a cracked head. Did you use a factory gasket from the dealer? If not, this is most likely the reason. Haven't had much luck with the aftermarket stuff working correctly on those.
SOURCE: Do I have to replace the lower intake gaskets when
yes,,and you should as they are very known forn leaking
SOURCE: replaced head gaskets upper lower intake gaskets
Is it even trying, backfire, crank real fast. Or just won't start at all no matter what you do? Also is the gas good?
SOURCE: 1999 S10 blazer 4.3. need to replace lower intake
If your going to replace the lower intake and the set came with the upper why not replace it, your removing it any way.the silicone you need to used it at the 4 corners where the heads meet the engine block or you will have leaks.
Pressure inside the engine is the cause of most oil leaks. Imagine you having a mouthful of mashed potatoes. They probably won't leak out until something makes you laugh or sneeze, increasing the pressure. You don't have a gasket problem, you have a pressure relief problem.
Either you have worn cylinder rings and/or a blocked PCV valve or other emission system malfunction.
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