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Persistent Vacuum Leak at cylinder no. 1

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Hi Fellow Legacy believers,

I have a 1991 EJ22 in a VW Vanagon aka Busaru


I have a recurring vacuum leak between intake manifold and cylinder head at cylinder no. 1


New gaskets did not improve this condition. Looking at the new gasket after first installation it is apparent the manifold is barely touching the gasket at cylinder no. 1


Case sealant on new gaskets did not improve this condition.


Is this a common issue with EJ22 intakes?


Do these intake manifolds warp?


What else could cause this?

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