$#%@!*& Intake gasket!!!
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$#%@!*& Intake gasket!!!
I have a '78 f-150 with a recently rebuilt 400 in it and I seemingly cannot get an intake gasket to seal on it no matter what I do. I have never had this problem before with any other motor. Except this one. I am fourtunate enough to have a compressor at my disposal with a die grinder and cookie discs etc. I clean the crap out of all the mating surfaces (just like I always do) and after I let the gasket set and tourque up the manifold it runs great. For about a week. then I get a fluctuating idle, inconsistent vacumm signal, everything! Every time I pull it apart there is oil all over the bottom of and sometimes going into the intake ports. No leaks anywhere else just along the bottom of the intake ports. I have tried Print-o-seal, Tourque-Plus, Stock valley pan, every type of gasket imagineable and I can't get this thing to stay sealed for more than a week. Someone please help!!
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Joined: Feb 2001
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From: Porterfield
$#%@!*& Intake gasket!!!
Yap sounds like you have a mismatch in the intake to heads ..
This happens when you mill the heads or have the block decked. Here's what you have to do to fix your problem.Your going to have to find out if the heads or block have been milled and just how much. and then have the intake milled to match.You wouldn't believe how just milling .020 off will make everything fit better.
This happens when you mill the heads or have the block decked. Here's what you have to do to fix your problem.Your going to have to find out if the heads or block have been milled and just how much. and then have the intake milled to match.You wouldn't believe how just milling .020 off will make everything fit better.
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$#%@!*& Intake gasket!!!
With the tourque-plus gaskets you definitely have to re-tourque the gasket. I.E. Bold letters in the instructions that come with it. As for the intakes I have tried my Offenhauser 360 and my Edlebrock Performer 400 egr both with the ARP stainless bolts included in the engine bolt kit. All of the above and to no avail. My Machinist says he took a "Light cleanup cut" off of the heads. Claims that it was .006 "barely measureable." I know because I was bugging him about it in relation to excessive lifter preload and the possibilty of using the Crane shims to correct it if it was a problem. No shims, and so far no problems. Someone please knock wood for me.
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$#%@!*& Intake gasket!!!
If you continue to have problems lay the manifold in and measure any gap between the manifold and head with a feeler gage. This will tell you if they aren't parallel for some reason.
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