Oil "Use" Ford 427/535 Crate

[blykins]

Originally Posted by tortuga

Cometic makes .060, .120, and .200 thick gaskets for exactly this issue, I’m going to try going with the .120 after maybe shaving a bit off the manifold where it seals to the China walls after checking it per the install instructions.

Thanks for the astute observations fellas

Steve H
Spf1764

Hold up a minute now, before you go ordering stuff that you don't need. This is not the situation for a .120" gasket thickness and really has nothing to do at all with the china walls, unless you have zero gap there now.

I'm not giving the shadetree mechanic version, I'm giving you the engine builder version so you know how to fix this correctly.

Look down the intake plenum and see how the ports line up. If the intake port roof sits below the cylinder head port roof, then your plan of action will be to have the intake side flanges milled until they're true and the right angle. THEN you take a measurement and see how thick the intake gaskets need to be to line the port roofs up.

If the intake port roof sits above the head port roof, then take the intake off, take the intake gaskets off and set the intake back on and check it again. If they line up, then you need to have the intake side flanges milled by the thickness of the gasket.

There are two priorities here. The first priority is that the intake manifold flanges are the correct angle and are straight/flat. The second priority is that the ports line up.

[tortuga]

Which is half the battle, I replaced the felpro 1262s gaskets with the recommended ford racing blue ones...

Took it for a 85 mile drive with a lot of rev matching and engine braking and the oil level didn’t budge one iota.

I am sort of expecting to have to tear it down again to do it “right” per all of the excellent advise from all of you really knowledgeable pros who have kindly taken the time to share their wisdom! Mr Blykins in particular.

The ports DO match up pretty well on center (well #2 & 6 that are a straight shot in on my super Vic), by eyeball anyway, the sealed gaps on the China walls on either end look pretty small, but it’s kind of hard to judge with the sealant goobering out and I don’t really want to trim it for fear of pulling it out.

It’s great to have the mystery solved though, dealing wit this issue is not that big of a deal.

Thanks again guys!

Steve H
1764