Blown Motor, Engine Rebuild/Replacement.

faceglide

Dunno, just seems like a losing battle.

Fix it one place, it will break another. Since the area of breakage is not isolated to one spot, you cannot guarantee that it just won't keep cracking on you.

That being said, who knows when/if the crack would be catastrophic. All I know is I wouldn't want to worry about it.

Do not lose hope cosmo, you do not want to get a GTR, I heard they instantly turn you into an "old guy"....be young with us, we have tequila!

COSMO

Still researching on technique's on how to weld cast iron and came across this:

Stick Electrodes - Welding Cast Iron

Also found this very informative video on welding cast:

http://www.youtube.com/watch?v=Yopcz-IYDyQ

Rusty

The video is the same way I would weld it, only with Tig. I would use preheat, and slow cooling too. He is using Ni-rod 99. I would use Ni-rod 55.

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Chuck33079

So is a coating on the manifolds going to make it more or less likely to crack?

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COSMO

I think next week I'm going to call a few company's that make cast manifold's here in America to get educated...

Rusty

If you can find out what type of cast iron is used. That will help alot in chosing on how the repair it.

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COSMO

Would love to but gtm is no way going to admit their manifolds are garbage and help in any way to fix the crap they made... Rusty what are your thoughts on the cryo treatment. The way I see it I don't see how it would hurt anything..

Rusty

My thoughts on cryo treatment. On high impact parts like ring and pinions, gears. No problem. Brake rotors, the jury is still out because of the heating cycle. On something like an exhaust manifold for a turbo car. Think it might be a waste of money because of the heat cycles that it goes through. From ambient temperature to something like over 1,200 deg. (If it glows red, it's that hot) Everytime you start your car and hammer on it. It will go through that cycle. Need something like a slow warm up, and a slow cool down. Think a blanket around around the manifold will help with keeping it stable.

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G37sHKS

I don't think coating the manifold will stop the crack

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Rusty

Coating the manifold inside and out before it cracks should help with the heat. But if you coat it after the crack starts. Thats a waste of money.

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COSMO

I like the idea in that video I posted of the guy drilling holes in both ends to stop the crack from going further and welding the middle. Maybe I should just send them to rusty and then to vsr for the cryo treatment.. Either way we need to figure this thing out because there be more to come...

Ron

We need a car with a GTM kit and an owner willing to lend it to some company so that we can get brand new custom manifolds that fit the kit. Easier said than done though lol..

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COSMO

You do know the cryo treatment is not a coating right? Cryo treating is supposed to make the material 50-60% stronger regardless of heat cycles. When my car was running my logs never went above 1100F on the EGT.

Rusty

Yeah, it's freezing the **** out of it. LOL Lower the temp down to around -300F to stabilize the molecular structure. It's used to remove residual stresses, and improve wear resistance. The company I used to work for did it for awhile. Wasn't a money maker for them. We also did plasma spray coating for thermo parts. I feel comfortable with it on ring and pinions and gears. But for manifolds, I don't know. 1100F is still hot. It's glowing.

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