Oil leak from intake manifold

[TGP37]

I am pretty sure the leak is coming from the bolts of the LIM. The one I can see has oil above the washer when you shine light on it. The motor was rebuilt by a local machine shop and they installed the LIM for me. I have a custom made intake coming and will seal with silicon when I break it down again. I am pretty sure it is not the valve cover gaskets. I just replaced them again and was very careful to make sure they sealed. Thanks for all the replies.

It seems like you know what your talking about. I know GM states the LIM must be torqued down in a two step method. The 4 long bolts first, then the 4 side angled bolts. I read the LIM would leak if not done right. I, personally, had not had a LIM leak....yet. But I guess it happens, like any other leak.

Two of the side bolts are difficult to tighten with the socket wrench since they are recessed. I can see a technician failing to properly torque them.

I haven't used thread lock for the LIM, no leaks for me. I hope you don't have a crack, that would suck.

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