Thread: Intake manifold sealing issues

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Thanks for the welcome and responses.
Heads and block have never been decked everything bone stock and in spec. The machine shop owner is my friend and did the work as a favor. I assisted with all the machining so no reason for him to be dishonest. All the intake gaskets when pulled off were squashed the sealing ridges were all flat. They appeared to have been squished properly. They were all covered in oil at the bottom.
The block is at 90°, I understand that some intakes need milling to fit correctly that is why I tried three. It's hard for me to believe all three were off. The OEM cast iron manifold was on the engine before the rebuild and didn't have this issue. The intake port angle of the heads are 80°.
I'll check the gasket pinch tomorrow off the last gasket change.