Intake Manifold Question

Adger Smith · 01-03-2008, 10:18 AM

Making the bolt holes larger in the manifold is a crutch & I would have never done that. You loose a good visual starting point for alingment when you get the drill out. If the manifold is milled correctly the bolt holes will be in alignment. Re read my post about measuring across the valley from port to port on the head & then on the manifold.

FED 387 · 01-03-2008, 11:31 AM

maybe measure from the centerline of the crank to the top of the deck to get the measurement of what the deck is currently & compare that to the chevy guidelines as to what the "correct" distance should be ---this will tell you if the block has ever been machined---if it has by comparing the 2 measurements you will be able to determine how much you will need to remove ---also remember that you will want a few "thou" difference between the top of face of the manifold and the bottom of the manifold head match ---the gasket will take up most of this and when the manifold is tightened down it will eliminate any leaks at the head/block/manifold quench point---Right Adger???? Comp 387

SSDiv6 · 01-03-2008, 12:23 PM

If you cut more than required, you can still get thicker gaskets that will make up the excess cut. Some time ago, I purchased a left over Mopar engine built for the IROC series Dodge Daytonas. When I pulled the intake manifold from the W-5 heads, there were four thin gaskets that had been glued together to make up the seal.

01-03-2008, 10:18 AM	#1
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Intake Manifold Question Making the bolt holes larger in the manifold is a crutch & I would have never done that. You loose a good visual starting point for alingment when you get the drill out. If the manifold is milled correctly the bolt holes will be in alignment. Re read my post about measuring across the valley from port to port on the head & then on the manifold. __________________ Adger Smith (Former SS)

01-03-2008, 11:31 AM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,424 Likes: 547 Liked 334 Times in 181 Posts	Re: Intake Manifold Question maybe measure from the centerline of the crank to the top of the deck to get the measurement of what the deck is currently & compare that to the chevy guidelines as to what the "correct" distance should be ---this will tell you if the block has ever been machined---if it has by comparing the 2 measurements you will be able to determine how much you will need to remove ---also remember that you will want a few "thou" difference between the top of face of the manifold and the bottom of the manifold head match ---the gasket will take up most of this and when the manifold is tightened down it will eliminate any leaks at the head/block/manifold quench point---Right Adger???? Comp 387

01-03-2008, 12:23 PM	#3
SSDiv6 VIP Member Join Date: Feb 2003 Location: Mesa, Arizona Posts: 3,047 Likes: 712 Liked 1,605 Times in 583 Posts	Re: Intake Manifold Question If you cut more than required, you can still get thicker gaskets that will make up the excess cut. Some time ago, I purchased a left over Mopar engine built for the IROC series Dodge Daytonas. When I pulled the intake manifold from the W-5 heads, there were four thin gaskets that had been glued together to make up the seal.