06-19-2025, 12:23 AM

Ronj1969

Member

Join Date: May 2025

Posts: 51

Did I mess up not using the block off plates on my 400?

Just replaced my head gasket completely reassembled my engine with new gaskets and started it up it appears the I have a massive air leak coming from the exhaust crossover. The Intake gaskets came with what looked like 2 exhaust crossover block offs. When installing decided to not use them as I didn’t use them on the last time a pulled the intake Here are the pics. Should I have left these block offs in there even thought they were thicker than the actual gasket which is why I chose to not use them ?

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