Are you putting a gasket on both sides of the valley pan, one against the head and one against the manifold, I rebuilt a 400 back in 1985, it never made it into the car, 73 road runner, still have the engine, never started, so it's been a while.John
Wask....
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: 'DAVID HURD' via The 1962 to 1965 Mopar Mail List Clubhouse <1962to1965mopars@xxxxxxxxxxxxxxxx>
Date: 6/25/20 12:03 PM (GMT-05:00)
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Subject: Re: Are Intake Manifold Gaskets Required on a 440?
Yes use gaskets!
I have a high performance 413 bored with roller cam, etc.
The fabricator of the engine used some type of sealant as a gasket Ming substitute. After about 10,000 miles all sorts of leaked developed. Killed all the vacuum and diminished the power breaking capacity.
Took it apart, cleaned to goo that was used, used a good gasket and it made all the difference in better performance. Especially the ability to sync the dual carbs. Runs way better.
On Jun 25, 2020, at 8:31 AM, 'MARK EVANS' via The 1962 to 1965 Mopar Mail List Clubhouse <1962to1965mopars@xxxxxxxxxxxxxxxx> wrote:
My 361 Engine Builder told me the same thing, then I developed a vacuum leaks in the car ran terrible, it’s worth the $8 insurance, I had to disassemble my intake and put in gaskets
I could see the vacuum leaks with black streaks on some of the poorly machined Surfaces
Mark
On Jun 25, 2020, at 11:25 AM, Wade's '62 Sport Fury <dwadelawrence@xxxxxxxxx> wrote:
I'm getting to reassemble my 440 engine for my '62 Sport Fury, it's not a high performance engine or anything. A buddy of mine who has assembled several 440 engines stated that I don't need the intake manifold gaskets, they are 'nice to have' since the
valley pan gasket suffices, and he's run several engines without them with no problem.
I'm a little doubtful of this claim, but wanted to get your thoughts? Anyone else have a similar viewpoint?
Thanks much - Wade
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