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  intake leak on 351M

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Author Topic:   intake leak on 351M
sigtauenus
Gearhead

Posts: 1413
From: Beaufort, SC
Registered: Jun 2000

posted 02-03-2002 04:26 PM     Click Here to See the Profile for sigtauenus   Click Here to Email sigtauenus     Edit/Delete Message   Reply w/Quote
Hey guys, I know about throwing out the cork seals and using RTV on our small blocks to seal up the intake good, but what about a 351M. It uses that big (and expensive ) metal valley pan and it sucks for oil leaks. Any tips/ideas on how to seal it up?

That intake (cast iron, 2v) is a monster and I'm tired of lifting it in and out (yes, 3 times since I've owned the truck for various reasons) and still having it leak.

Also, while I'm at it, would I really get anything out of putting on an aluminum intake and 4v carb on a stock 351M? It gets 10mpg right now with the 2v and has good (better rephrase that as "satisfactory") performance (DON'T LAUGH) for what I use it for. Its an old beater truck and gets treated as such. But, I'm just thinking aluminum would be easier to man handle back onto the engine and since I just bought that holley to replace my 4100, I have an extra 4v already...

[This message has been edited by sigtauenus (edited 02-04-2002).]

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67coupe
Gearhead

Posts: 158
From: dallas NC usa
Registered: Nov 2000

posted 02-03-2002 10:26 PM     Click Here to See the Profile for 67coupe   Click Here to Email 67coupe     Edit/Delete Message   Reply w/Quote
hi ive got a performer and a 600 holley on my truck (77 f150 4x4) and it really helped the topend and a little in mid to bottom. good luck on however u go ps much easier to take on and off

------------------
Josh
67 coupe with 351c
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5

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craigber
Journeyman

Posts: 54
From: Vancouver, Canada
Registered: Sep 2000

posted 02-04-2002 11:32 AM     Click Here to See the Profile for craigber   Click Here to Email craigber     Edit/Delete Message   Reply w/Quote
Hi,

use a thin coat of aviation gasket maker (brown sticky stuff) on both sides of valley pan...use thin side rail gaskets that come with valley pan....use end seals or RTV...let set a few hours before starting engine...I know the frustration...did my aluminum intake four times (using various combinations of gaskets, valley pans, side rails, etc.) before I finally got it right...

------------------
Craigber
71 Red Rag

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Daniel Jones
Gearhead

Posts: 211
From: St. Louis, MO
Registered: Aug 99

posted 02-04-2002 06:33 PM     Click Here to See the Profile for Daniel Jones   Click Here to Email Daniel Jones     Edit/Delete Message   Reply w/Quote
Look for the "valley pan installation" post down the list a bit.

Dan Jones

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