Cascade Crew

91RSVert

Ok, after bolting most of my stuff together, I found out these new heads are milled and bolt holes and mating surfaces are not lining up. I have decided to "do this right" and either put thicker gaskets, or gaskets with shims. That way my pushrods n stuff should be at correct angles too.

I do not know how much its been milled, Ive contacted the PO. But last time it took him about 3 days to contact me back.

I currently have z1004 .041 gaskets. I used copper coat installing. Since the car has not been ran, can I reuse these?

Thinking about using z1094 .015 shims. Do these go ontop of the gasket, or below the gasket?

z1004+z1094=.056 thick. I'm not overly warm n fuzzy about running "2 gaskets". But I know its been done for decades, so it must be ok.

Now, I see gm has gasket 12557236 at .051 gasket. Think I'm going to notice .005? That way I could run one gasket and be warm n fuzzy?

Since motor hasnt been ran, do I need to get new head bolts? I really wanted studs, but got bolts as a gift. I see a headstud kit is about double the cost of bolts. But if I'm running double gaskets, would studs be better? I know it would help on installing these damn things.

Any help would be great as I obviously got in WAY over my head on this job.

Twilightoptics · Posted: Thu Oct 08, 2009 6:55 pm Post subject:

All heads are milled. I'd urge you to really think about what's going on.

NEVER stack head gaskets.

1094 is a gasket itself. It's rubber coated and you use copper coat on it.

NO need for copper coat on the .041 composite gaskets. Since you did use copper coat, if you pull the heads off, those gaskets are junk.

I've seen heads milled from 72cc to 64cc chambers, that's ALOT of material, and the intake still lines up. If they went that far, you'd barely have a chamber at all.

Any head that gets reconditioned gets milled on the fire deck. It's only .004"!!! .010 at the MOST for cast heads that are really bad.

EDIT, read your other post.

Which holes aren't lining up? Is it just the center two on each side? Sometimes it takes a little finesse to get the bolts started.

redlava · Posted: Thu Oct 08, 2009 9:07 pm Post subject:

After reading your other post it seems as if your intake mating surfaces are to far apart to use the standard gasket. If the mating surfaces are just to far apart you will need a felpro 1205 I believe. Its cut to fit and .120 inches thick gasket. This is twice as think as the standard gasket. This will raise the intake up slightly possibly lining up you intake bolts. To check if this will work just lift the intake up slightly and see if your bolts line up or try putting in the intake bolts very loosely so you are able to lift the intake up while screwing the in the bolts.

izcain · Posted: Thu Oct 08, 2009 9:41 pm Post subject:

The Fel-Pro gasket 1205 is a stock thickness gasket just has larger ports although your on the right track redlava, as Fel pro does offer a couple of special gaskets you can get that are thicker then normal to take up the extra slack. I would get out the clay and get a measurement to see how thick of an intake gasket you will need. Once you get a measurement im sure one of us on here can find the right one for you!

91RSVert · Posted: Fri Oct 09, 2009 2:39 am Post subject:

The intake, w/o gaskets will go down and bolt up. Once I put my standard .06 thick 90314 gasket down, the bolt holes wont bolt up. I can get one side, but the other wont. Doesnt matter which side I start with.

You can look and see that the angle of the surfaces is not the same.

91RSVert · Posted: Fri Oct 09, 2009 5:29 am Post subject:

Who also thinks I should go ahead and do a cam while I'm in this deep Laughing

91RSVert · Posted: Fri Oct 09, 2009 6:54 am Post subject:

PO got back to me today, sweet.

He thinks they were shaved .015.

So that means I could use GM's .051 gasket and it should match up closely.

Twilightoptics · Posted: Fri Oct 09, 2009 6:16 pm Post subject:

Dewey316 · Posted: Fri Oct 09, 2009 6:22 pm Post subject:

A few thousands difference between the head and block won't make a difference.

Can you explain a little more about what is not lining up? Just certain bolt holes? The intake gaskets, your post isn't really clear on what part of the intake is not lining up.

91RSVert · Posted: Sat Oct 10, 2009 3:57 am Post subject:

I personally think they are shaved more then he said.

The bolt holes between the heads and intake when I have the gaskets in.

I can bolt one side up. Then it makes the other side line up off just enough that it tries to cross thread the bolt. You look down in the hole and can see that its just ever so slight off Evil or Very Mad

I got ahole of a 2d autocad file that has a sbc drawn to scale. I moved all the crap around to try and see how far off all this is. You would be surprised how slightly moving this n that around throws other crap off.

Twilightoptics · Posted: Sat Oct 10, 2009 8:50 am Post subject:

Hehe engines don't read books.

You've tried just barely getting the one side started, then moving to the otherside right?

91RSVert · Posted: Sat Oct 10, 2009 12:11 pm Post subject:

Yes, I was just going to put 2 bolts in each side. Wont go.

aaron_sK · Posted: Sat Oct 10, 2009 7:18 pm Post subject:

Is the distributor in when you try and start the bolts? I'll usually blind-stab it and seat it before starting the intake bolts to make sure the manifold is centered on the block.

RSFreak · Posted: Sat Oct 10, 2009 10:41 pm Post subject:

What year car is your TPI from? If its from an '87 - '92 it will be a Vortec style intake with the center holes at a different angle than a non Vortec intake. These obviously require Vortec style heads. Vortec style intake on non-Vortec style heads or vice-versa perhaps? Just throwing it out there...

EDIT: Ok, after re-reading your post this seems unlikely...

91RSVert · Posted: Sun Oct 11, 2009 4:40 am Post subject:

Quasi-Traction · Posted: Sun Oct 11, 2009 8:43 am Post subject:

aaron_sK · Posted: Sun Oct 11, 2009 9:14 am Post subject:

Twilightoptics · Posted: Sun Oct 11, 2009 9:16 am Post subject:

RSFreak · Posted: Sun Oct 11, 2009 1:52 pm Post subject:

Twilightoptics · Posted: Sun Oct 11, 2009 4:34 pm Post subject: