[joeshovelhead]

the used exhaust manifolds have obviously gotten hot and have twisted a bit. are their any tricks to getting them back on? thank you for your suggestions, Joe

 

[poncho62]

What engine?....I have never seen an exhaust manifold warp. You could always plane the mounting edge to fit.

 

[heyjude076]

Are these stock cast iron manifolds or are you refering to the flange on headers? If headers what thickness are the flanges.

 

[302 Z28]

I have seen stock cast iron manifolds that have warped and been resurfaced. The older Ford 352 and 390 engines were notorious for exhaust leaks at the manifolds. Most times the resurfacing is just a temporary fix as the manifolds warp again. I have had better success using dead soft copper gaskets than having the manifolds resurfaced.

Vince

 

[joeshovelhead]

I have seen stock cast iron manifolds that have warped and been resurfaced. The older Ford 352 and 390 engines were notorious for exhaust leaks at the manifolds. Most times the resurfacing is just a temporary fix as the manifolds warp again. I have had better success using dead soft copper gaskets than having the manifolds resurfaced.

Vince

they are stock sbc, not headers.my problem is that i do not like the way i am having to force the bolts into the bolt hole. i am afraid that i will cross thread the bolts. i need to get the holes in the manifold realined or at least alot closer to the bolt holes on the head. thank you, Joe ps i have herd of guys walering out the holes i do not think that would work out very well at all.

 

[Soul_Hunter]

thats a common problem.
you need this,
http://www.lislecorp.com/tool_detail.cfm?detail=65

 

[302 Z28]

That is a pretty slick tool, .......somebody was thinking. :thumbup:

Vince

 

[poncho62]

That tool just makes me wonder how much stress it would put on the manifold, causing them to crack. The manifolds shown in that pic eventually ended up having a bar cast between the ports....I guess they had complaints.

 

[Montebrian]

Open the holes up just a little bit and then surface the manifold on a large industrial old school cylinder head resurfacer or belt sander.

I run more heat through stock manifolds than just about anybody...Stock manifolds on my SBC into a 67mm Turbo...= really hot manifolds!

 

[carsavvycook]

thats a common problem.
you need this,
http://www.lislecorp.com/tool_detail.cfm?detail=65

I have had 4 of these for years. They work as advertised. I have yet to crack a manifold when spreading them back out.

 

[joeshovelhead]

they are on ebay for 6.95

they are on ebay for 6.95

 

[Chevrolet4x4s]

The manifolds for my 93 did the exact same thing as soon as I took them off,haven't worried about it yet as the headers are just fine
Shane

 

[Soul_Hunter]

i've been using those manifold spreads for years and i've never had a problem.
i feel if you work on SBCs and don't have a set in your tool box, no matter how many tools you have your tool set isn't complete without them.

 

[eloc431962]

I have never had a problem with the manifolds, But have seen other people that have, I'm going to get that little tool just in case you never know. . Cole

 

[joeshovelhead]

i've been using those manifold spreads for years and i've never had a problem.
i feel if you work on SBCs and don't have a set in your tool box, no matter how many tools you have your tool set isn't complete without them.

why do you need a set. i am planning on mounting the middle first and then one end at a time.

 

[Chevrolet4x4s]

why do you need a set. i am planning on mounting the middle first and then one end at a time.

Because they wont line up,you could get by with one I suppose,but its the minimum.
Shane

 

[327 / 350 hp]

exhaust manifolds

Hi Joe,, I have had same problem at times, I ground the offending bolt to a taper , to guide it.. Worked for me....GOOD LUCK...