Leaking intake on 400

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Nov 2, 2007 | 11:00 AM

bareaneye

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Senior User

Joined: Oct 2005

Posts: 156

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Leaking intake on 400

I have a 400 with a Weiand intake on it. I have replaced the gaskets with those recommended (fel-pro), used silicone instead of the rubber or cork. I have also used the cork. I have torqued per spec. I have allowed the silicone to dry for at least 24 hrs. I have cleaned very well all of the surfaces. IT STILL LEAKS OIL AT THE REAR!!! This happens about 6-12 months later. I am using the black silicone. What gives?????

Nov 2, 2007 | 03:30 PM

Colo79Ford

Elder User

Joined: Jan 2004

Posts: 887

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From: Colorado

Is it leaking at the manifold, or at the oil pressure sending unit?? My oil pressure line leaks like crazy sometimes on the back of the block, and i always thought it was the back of the manifold.