Manifold stretcher

[skylark]

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I HATE exhaust work! Every time something goes wrong and this was no exception. We have a California emissions Yukon that we are doing an engine swap on and it has the air injection manifolds. The one on the drivers side shrunk. I had to stretch it about 1/8". Here is what I came up with. A grade 8 bolt and nut, a bearing and a flattened lock washer. The nut when unscrewed puts pressure on the bearing and the flattened lock washer sits against the manifold allowing the bearing to turn.

 

[someotherguy]

Nice work. I've got the Lisle spreader, works great, but your gizmo is nice for having the pieces around to pull it off.

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Richard

 

[michael hurd]

I usually drill the manifold bolt holes out, cast iron drills like butter.

 

[someotherguy]

I can see how that might work in some cases. With this one, I think I would have ended up with just a little bit of port mis-match!

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Richard

 

[sewlow]

The air injection manifolds on my last square body gave me nothing but headaches. Headers solved that.

 

[skylark]

The air injection manifolds on my last square body gave me nothing but headaches. Headers solved that.

If this was a vehicle that I was keeping then I would have done just that. My old Denali was a CA emissions as well and I put a set of JBA shorties on it. This one will be in the fold until I get the dually fixed and then it goes off to my detailer.

 

[skylark]

I usually drill the manifold bolt holes out, cast iron drills like butter.

I had considered that but I was concerned with having to drill the manifold so far over sized.

 

[TylerZ281500]

one reason i hate them damn manifold

 

[great white]

You must be registered for see images attach

I HATE exhaust work! Every time something goes wrong and this was no exception. We have a California emissions Yukon that we are doing an engine swap on and it has the air injection manifolds. The one on the drivers side shrunk. I had to stretch it about 1/8". Here is what I came up with. A grade 8 bolt and nut, a bearing and a flattened lock washer. The nut when unscrewed puts pressure on the bearing and the flattened lock washer sits against the manifold allowing the bearing to turn.

Cool beans!

Great adapating to the situ at hand.

 

[TXVortec454]

I thought I was the only one that this has happened to. I had to drill out my manifold on the TBI 350 in my K10. I still was not able to get one bolt in on cylinder #1. No leaks, so I stopped caring.