Thread: oil leak manifold to block?

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Are you using a PCV and breather system? this serves to relieve the pressure building up under the manifold. If so, check that your pcv valve is functioning properly.

I had the same problem, even with the breather/pcv. The rubber gaskets that seal the front and back of the manifold are junky and leak-prone. Best solution is to pull the manifold again, make sure the block and manifold are clean as can be, and instead of using the rubber gasket, just lay down a 1/4" bead of copper rtv sealant along the block, and a bit up the sides of the heads (right up to the manifold-to-head gasket). Drop the manifold back into place, and tighten to torque spec. This should give you a good seal. It worked for me.
Good luck...

Thanks 63boxnova,
I have a pvc valve in the valve cover but it's not hooked up to anything. Does this defeat the purpose.
The front is dry as a bone, just the back leaks with RPM (at idle-no leak)
Yeah I'll have to pull the manifold tomorrow. Do I need to replace the maind manifold gasket or can it be reused?

-Brad

Novaman,
I had the same thing happen on my 283. I pulled the intake (reused the old gaskets, applied a 1/4 bead of RTV, let it set for two hours and torqued the intake. No more leak.
In response to your leak on the distributor. I originally forgot about the gasket and never lost oil from this area, after about two weeks of running I saw the gasket sitting on my workbench.

Good luck,
Kevin