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gasket failure

  1. Intake
    Have an 03 Impala LS 3800 @ 117K miles. In process of a L36-L26 upper swap and new gaskets for LIM/UIM. Have more planned on this. Just noticed a slow total coolant leak of 1/2 -3/4 gal over last few months, so go this going. I cleaned up the LIM today and saw pitting around the coolant ports...