Blown Motor, Engine Rebuild/Replacement.

Dzel

Damage control for a week caused more damage than they think

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10secWS6
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faceglide

He has commented on it before, typical blame the customer approach....5000miles to crack a manifold, Cosmo, you running a 3" drop airbag hydraulic HERRAflush setup? According to that guy, you probably are.

George has been idle for a week or two, I sure hope they are paying him, he is at least putting in a good effort. After those refunds are issued!

Lets put together a tequila fund for cosmo...might need a case or two before this is all said and done my friend! Best wishes!

G37sHKS

I don't agree with George about what he said in that quotation.
I know a lot of people who have cracked manifold and they just fix it without speaking to this or that for sake of peace.

Some people are just so patient and fix things without dealing with a company that cant keep up with their orders. (Hint Hint)

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COSMO

My car does not sit low and I'm sure others will find soon enough that their manifolds have cracked as well if and when they get back in there to inspect. I believe the problem here is there has been no long term r&d on this kit and now us the customer have to pay tp clean up gtm's mess..

SharpByCoop

Here's a photo of this infamous (and not that uncommon) crack:







phunk called it.

Truthfully, the sky is NOT falling. No one is losing boost or exhaust out of that. Had mine not come apart, I'd have never known. Probably been like that for a few thousand miles and would stay like that.

No it's not great, but *what if* you simply put it all back together and ran it? There is all likelihood it would continue working as wished. Just saying.

Coop

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Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)

COSMO

Coop do you really think the crack is just going to stop? Yes it may work now and further down the road but eventually it will fail completely. We all paid good money for our kits and now having to deal with this. Gtm should do the right thing and atleast send out new manifolds and warranty them.
I just sent them an email so I will be sure to keep everyone posted if I hear anything back from them.

COSMO

Correct me if I'm wrong but isn't that the passenger side exhaust manifold?

jwick

Looks like it to me since the downpipe is still connected in that last picture

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

COSMO

Well if that's the case the problem is not just isolated to the drivers side.
I'll be honest, at this point I'm considering just putting a stock motor back in and selling everything else and going car shopping.

jwick

That sucks but completely understand your frustration. If only I had a beater I would pull my motor and swap you, obviously with a little cash coming your way.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

wstar

I'm surprised the manifold is even capable of cracking right at the spot in the pic above. I mean, the crack is right up at the start of the manifold between sets of bolts that should hold the cracked pieces together fairly rigidly, so there shouldn't be any really huge differential in mechanical stress on the two sides of that crack. I could understand if it was closer to where the turbo mounts at... but that pictured crack would seem very likely be a design fault with the item under heat stress.

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Journal thread / Car setup details

G37sHKS

it IS a design fault.. They know it will crack if you did not baby it and hell no im not gonna baby my car if I paid 20k$ im sure others think the same.

Now, Im pretty sure that the new manifolds from GTM (V3) will not only have better flow but stronger than ever. What im not so sure about is why it took them so long to finally create a new manifold.

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fuct

if everyones manifolds are cracking in the same spot then id say its a design issue. if people are having cracks in random spots then it could just be crappy iron.

where the foundry that casted these manifolds gets its raw material id like to know....

hell didnt GTM mention their first batch of cast manifolds for the new kit had issues?

phunk

While I was saying that cracking cast iron turbos manifolds is pretty common... I am not saying it will not effect performance. At first it wont. But it gets worse, and it spreads, and the material gets more brittle pretty fast. Eventually you will see light through the crack.

By the time you can hear it with your head in the engine bay, it has a pretty harsh effect on performance. A lot more than you would think from how minor it looks... more than I can really understand or explain. But I have experienced it and it really does effect performance.

It can be welded by a professional who is familiar with repair welding this type of part for the environment it will see, but it is a temporary fix, and it will crack again along the edge of the weld later (from what I have seen, maybe there are people that can do it better than i have seen).

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Rusty

To weld something like this. I would drill a hole at the ends of the crack. Grind a V in the crack about 3/16" wide. Bolt the manifold down so it doesn't move. Preheat the manifold to about 700deg. Tig weld it with something like Ni-Rod 55. Weld only one inch of the crack at a time. After each stitch. Peen the weld with a ball-peen hammer. What is causing the cracks is unequal heating and cooling of the manifold. That turbo heats up slower then the manifold, and cools off slower then the manifold. I've welded cast iron in the past with the company I used to work for with great results.

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