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if u have a plenum air leak will that cause antifreeze to enter engine ? thank on 1998 Chevrolet Monte Carlo

found antifreeze in two cylinders and crankcase. also on top of intake manafold had heads redone and checked drained antifreeze and cleand crankcase all new gaskets started engine ran great for half hour started engine next day same problem oil inside air plenum on top of air intake number 56 clinders had oil too

Asked by for the 1998 Chevrolet Monte Carlo
poss intake gasket not sealed properly, did you have the heads ck'd for crack while they were off
yes had heads redone and fluxed antifreeze was in the air plenum, throttle body, and also ontop of intake manifold as well in two cylinders
poss intake needs reseal
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