Milling Intake Manifold

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bobscuda67

bobscuda67

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Can someone school me on milling my intake.
I had my block milled .015 last winter to clean it up for a MLS head gasket. Since I got it together I've had a water leak between the intake and the head in the back on the right side. And every once in a while it would burn a little bit of oil at idle. So I take the intake off and I seal the hell out of it around the intake ports and water ports. Of course it leaks coolant still and it's burning oil at idle way worse than ever. The #3 plug is oil fouled.:banghead:
The intake is sealed tight at the top but not tight on the bottom of the intake port of the head. So I took my intake to the guy that milled the block and he said it should have .035 off both surfaces. I thought it would have to be angled milled to get it to seal but he said no.
I'm having a hard time wrapping my head around this. If your taking off .035 all the way the intake would sit a little lower but still wouldn't be tight at the bottom of the intake port.
Can somebody correct me if I'm wrong. He's gonna cut it next week so I need to find out if it's going to work.
 
More work, but milling the intake side of the heads would allow you to use the heads anywhere else. If you mill the intake, then those two would never be good anywhere else. The intake couldn't be used on a different set of heads is what I'm saying. There are formulas out there to do what you're asking. The more experienced members will be along to help you. Until then, try and be patient. Tough to do I know! LOL
 
Just did a search. DO NOT TAKE THIS FOR FACT! Ok? I think this will work for you. It is a formula I was talking about. BUT WAIT FOR OTHERS TO VERIFY. Maybe I shouldn't put this out there, but I am warning you. We cool?
http://www.forabodiesonly.com/mopar/showthread.php?t=263253&highlight=milling+heads

See second post.

See post number eight

http://www.forabodiesonly.com/mopar/showthread.php?t=287573&highlight=mill+intake

Hope this helps. Seems to be the same numbers as the first one I posted.
 
Louie70Dart said:
Just did a search. DO NOT TAKE THIS FOR FACT! Ok? I think this will work for you. It is a formula I was talking about. BUT WAIT FOR OTHERS TO VERIFY. Maybe I shouldn't put this out there, but I am warning you. We cool?
http://www.forabodiesonly.com/mopar/showthread.php?t=263253&highlight=milling+heads

See second post.

See post number eight

http://www.forabodiesonly.com/mopar/showthread.php?t=287573&highlight=mill+intake

Hope this helps. Seems to be the same numbers as the first one I posted.
Click to expand...

Ha! Yea, were cool. Thanks and I'll double check to be sure.
Anyway it looks like .035 would be two much. Should only be .01425 per side, right?
 
If it was me, I would take the heads off and have the intake side milled on each. That way as long as those two heads stay together, you can use whatever intake, ootb. Otherwise that intake can only be used with those heads only.
 
Louie70Dart said:
If it was me, I would take the heads off and have the intake side milled on each. That way as long as those two heads stay together, you can use whatever intake, ootb. Otherwise that intake can only be used with those heads only.
Click to expand...

That would be a good idea but I'm using Magnum heads and there is only two dual plane intake that fits these heads, and the one I have is a Mopar M1.
 
In that case, I stand corrected. LOL
 
You need to check the angle of the heads vs the angle of the intake. I use a digital protractor to check this. I shoot for a variance of .3 degrees and usually get them within .1 degrees. This check is the most unknown overlooked never checked things in engine building IMO.


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