Thread: Exhaust leak on manifold

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The heads are good it's just the manifold that's screwed up. I've got another manifold I can use it is very similar and a lot cleaner, but I don't know if it will cause it to breathe differently.

The casting numbers are 3932469 (the bad one) and 3932473 (the good one). the only big difference I can find is the bottom of the good manifold has a block which would push my down pipe about an inch or two down further.

I'll have supporting pictures later tonight.

Originally Posted by Lefcrak

The heads are good it's just the manifold that's screwed up. I've got another manifold I can use it is very similar and a lot cleaner, but I don't know if it will cause it to breathe differently. The casting numbers are 3932469 (the bad one) and 3932473 (the good one). the only big difference I can find is the bottom of the good manifold has a block which would push my down pipe about an inch or two down further. I'll have supporting pictures later tonight.

The video was not necessarily only about re-surfacing a cylinder head, it was a tutorial showing how to re-surface and level parts at home for cheap. When I replied, I did not mean that I have done heads like this, I haven't. But I have used this procedure for leveling other parts in my home garage and it works great. If you tightened your manifold up in a vise and used the procedure shown, you would end up with a perfectly good manifold that would hold gaskets very well. Make your board long enough to be able to stroke the entire length of the 4 ports. I further understand that you probably don't want to buy a precision straightedge, I just included that for the other members of this forum so that they would have a source for it. If you use particle board and cut a band of paper that is normally used on a powered belt sander, you can make this tool for cheap. Here, for instance, is a belt 4" wide by 21 3/4" in length for 3 bucks. Cut it, lay it down on the particle board and use Gorilla glue to secure it.
http://www.mscdirect.com/product/det...gle-PLA+-+Test

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