Blown Motor, Engine Rebuild/Replacement.

jwick · 02-27-2014, 01:38 PM

Quote:

Originally Posted by 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.

This guy sounds like he knows what he's talking about. I'm a structural engineer in offshore industry and I have had some experience discussing weld repair with construction guys.

Rusty · 02-27-2014, 05:44 PM

Quote:

Originally Posted by 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.

Quote:

Originally Posted by jwick

This guy sounds like he knows what he's talking about. I'm a structural engineer in offshore industry and I have had some experience discussing weld repair with construction guys.

Thanks! Used to weld exotic metals at one time.

Forgot one thing. Need to wrap the manifold after welding in Kaowool to slow cool it to room temp.

COSMO · 02-27-2014, 01:32 PM

Rusty you might have found your second job thanks to gtm...

Rusty · 02-27-2014, 05:47 PM

Quote:

Originally Posted by cosmogirl

Rusty you might have found your second job thanks to gtm...

Might need it. Might be out of job shortly.

Read my post in my journal.

COSMO · 02-27-2014, 01:55 PM

What are the chances of having it fixed and billed to gtm? lmao!!!!! Sometimes I crack myself up...

fuct · 02-27-2014, 02:24 PM

Quote:

Originally Posted by cosmogirl

What are the chances of having it fixed and billed to gtm? lmao!!!!! Sometimes I crack myself up...

i see what you did there......

jwick · 02-27-2014, 02:39 PM

Quote:

Originally Posted by cosmogirl

What are the chances of having it fixed and billed to gtm? lmao!!!!! Sometimes I crack myself up...

The reimbursement line starts after the MHI refund line...

G37sHKS · 02-27-2014, 03:09 PM

Just call Sam man you have nothing to lose, Don't email him because he wont bother looking at emails. I always call him if I need something and he answers all the questions I have

Just tell him you have cracked manifold and he will take care of you

Im not fan of GTM right now because its no where near the quality of FI and BF turbo kit. I have faith in GTM that their new manifold will bring some tough challenge to competitors

AAM Performance might get Rank 1 in turbo kit after they release it.. who knows.

O&G · 02-27-2014, 04:41 PM

Cracks don't fix themselves! Like Charles said, it will only get worse!

COSMO · 02-27-2014, 09:32 PM

I spoke with bobby at vsr regarding my cracked gtm manifolds and he recommended shipping them down to his shop to have them welded and cryo-treating the manifolds. The cost would be $100 per set.

jwick · 02-27-2014, 10:11 PM

Quote:

Originally Posted by cosmogirl

I spoke with bobby at vsr regarding my cracked gtm manifolds and he recommended shipping them down to his shop to have them welded and cryo-treating the manifolds. The cost would be $100 per set.

I'm no metallurgist but I don't know if cryo-treating is what you want. As I understand it cryo-treating increases strength and hardness of the material. Harder material has a tendency to be more brittle. In a location that is going to constantly heat cycles, I'm not sure you want to have it be harder. I know we are very selective where we use high strength materials offshore.

I used to work with an engineer that knows a bunch about steel make up and thermal expansion. I'm going to try and get in touch with him and see if I can provide you with any additional information.

Nixlimited · 02-28-2014, 11:00 AM

Quote:

Originally Posted by jwick

I'm no metallurgist but I don't know if cryo-treating is what you want. As I understand it cryo-treating increases strength and hardness of the material. Harder material has a tendency to be more brittle. In a location that is going to constantly heat cycles, I'm not sure you want to have it be harder. I know we are very selective where we use high strength materials offshore.

But do consider that people (like Cosmo) cryo-treat their blocks, pistons, rods, etc, and all of those endure tons of heat cycling.

O&G · 02-28-2014, 11:12 AM

Quote:

Originally Posted by Nixlimited

But do consider that people (like Cosmo) cryo-treat their blocks, pistons, rods, etc, and all of those endure tons of heat cycling.

GTM manifolds are cast iron, non of the parts you listed are made of cast iron. We need a metallurgist to chime in, lol!

jwick · 02-28-2014, 12:32 PM

Quote:

Originally Posted by O&G

GTM manifolds are cast iron, non of the parts you listed are made of cast iron. We need a metallurgist to chime in, lol!

Beat me to the punch. Cast iron is a whole different animal compared to the steel used in the engine itself

elperuano · 02-27-2014, 09:46 PM

That's a good deal. Might have to hit him up on that.

02-27-2014, 03:09 PM	#8 (permalink)
G37sHKS A True Z Fanatic Join Date: Feb 2010 Location: Dubai Posts: 1,183 Drives: 09 G37S Coupe 7AT Rep Power: 22	Just call Sam man you have nothing to lose, Don't email him because he wont bother looking at emails. I always call him if I need something and he answers all the questions I have Just tell him you have cracked manifold and he will take care of you Im not fan of GTM right now because its no where near the quality of FI and BF turbo kit. I have faith in GTM that their new manifold will bring some tough challenge to competitors AAM Performance might get Rank 1 in turbo kit after they release it.. who knows. __________________ G37 BUILD UNDER CONSTRUCTION

02-27-2014, 04:41 PM	#9 (permalink)
O&G A True Z Fanatic Join Date: Nov 2010 Location: Lone Star State Age: 43 Posts: 1,212 Drives: 40th Anv. Rep Power: 24	Cracks don't fix themselves! Like Charles said, it will only get worse! __________________ O&G's Build/Journal <---(1st lowmount single turbo treeseventy) Built Engine Thread 2011 F-250 Build/Journal

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Blown motor!!!!	COSMO	Forced Induction	166	11-25-2013 08:33 PM
Someone in the DFW area who can rebuild a 370z motor	Denny McLain	Engine & Drivetrain	16	01-29-2013 05:27 PM
370z engine blown	Fabsnoop	Nissan 370Z General Discussions	53	06-02-2012 11:29 PM
WORST DAY!!!! Possible engine blown???!!!!	Westwood	Engine & Drivetrain	189	04-09-2012 11:28 AM
vq37vhr ( 370z motor ) NOT BLOWN	soaka1	Wanted	0	03-10-2010 10:01 AM

02-27-2014, 01:32 PM	#3 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 21	Rusty you might have found your second job thanks to gtm...

02-27-2014, 01:55 PM	#5 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 21	What are the chances of having it fixed and billed to gtm? lmao!!!!! Sometimes I crack myself up...

02-27-2014, 09:32 PM	#10 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 21	I spoke with bobby at vsr regarding my cracked gtm manifolds and he recommended shipping them down to his shop to have them welded and cryo-treating the manifolds. The cost would be $100 per set.

02-27-2014, 09:46 PM	#15 (permalink)
elperuano A True Z Fanatic Join Date: Oct 2011 Location: Southwest FL Posts: 1,374 Drives: G37S Rep Power: 30	That's a good deal. Might have to hit him up on that.