leaking...f...king valve covers ???

handbanana said
Are you CERTAIN that they are seated and sealing near the intake runners? Common problem with aftermarket intake manifolds. I've had to file a relief in cast covers many times, some more than others.
They can be hitting the runner (even just a little) and appear to be seated, but aren't . A tiny gap is all takes.
I've also heard of double gasketing with cork, but haven't had to do this myself.
Of course, prep is everything. Just shedding light on the not-so-obvious.
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Listen to this. I had a similar problem with Mopar Performance Valve covers and an EdelbroCuda43.JPG ck AIr Gap intake. The inboard lip of the valve covers were barely touching the manifold in two places, but it was so minor, I did not notice it at first. I wound up grinding a small relief in the valve covers in a few places. Not really noticeable.