I'm in a jam here. I had my neighbor grind the flange of my manifold down so that it would not interfere with the engine block, and he accidentally took off too much material.

The problem here is that I think that exhaust gas will leak through the head port because the end of the manifold wont have sufficient material to seat to the head.

Would I be able to fill the void with a few layers of weld? Also, this is a Full-Race Pro-Street manifold. Any advice would be appreciated. Thanks.

 

you can resurface it or just use a hardened washer for that bolt.

how was the turbo flange hitting the block? i didnt know f-r had clearance issues.

 

Still has plenty of surface area to seal. I honestly don't think it will be a problem.

 

He's not talking about turbo clearance issues. The lower flange sometimes hits the block if to much material has been removed from the head and block. If you look at the flange on the lower portion you can see that its been grinded to suite this mans needs.

 

sorry, didnt really look at the port shape, so the actual "head" flange sometimes hits the block...

 

IMO that won't cause you any issues at all, i'd leave it.

 

This is an OLD FR manifold...one of the first ones, so when using a straight LS setup (head + block) the flange would interfere with the block. Full Race offered to fix the manifold, but I was impatient, and this is what happened. I should have sent it back to them, but hindsight is 20/20. My neighbor's a pretty skilled machinist (worked for Rockwell/Boeing for 30 years) but he made a mistake, and **** like that happens, and pencils still come with erasers, so yeah...

Anyhow, I don't wanna use washers or resurface the entire flange. I'd like to "fill" the void and have the flange decked for the optimal seal.

Any good welders in SoCal? If so, hit me up! Thanks again everyone.

 

yup weld it back & then grind it down again

 

Your wasting your time man. It won't be a problem, it still has plenty of surface area. Washer aren't needed since he only grinded half way into the bolt hole. If he had gone all the way through the bolt hole it may need washers. Anyway, it can be welded but its most likely going to warp that section of the flange. Also, once you have it rewelded its going to have to go back to your buddy to have him grind that corner down again and for a resurfacing.

 

i was talking about putting a washer on the other side, not on the inside, so the stress put on that corner of the flange is spread out instead of bowing that shallower corner, but whatever, he has it figured out now.

 

Ah, you're right. I'll just try and use it the way it is and see if it works. If it doesn't, I'll get welded.

 

yeah youll be fine, get a new gasket while your at it. this has happened to us before as you can see, haha.

 

OEM multi-layer gasket + Permatex Copper Spray....right?

 

ive never had a problem with just a oe gasket

 

skip the spray

 

Cool, thanks. Crossing my fingers that air won't leak out of the exhaust ports.

 

it shouldnt... that doesnt really matter too much. Welding it, like others have said will most likely warp the flange.

 

Thanks SD_Lurker, Flashmn, k24em2, and redboost10. Autobots, roll out! (sorry had to).

 

A washers probably 3/32, theres probably still a 1/3" left on that flange, so i don't see how the extra bit would help.

 

nevermind.