LB7: Head studs vs factory

[Dirtymaxx03]

Because they arent TTY.......

I'm pretty sure James is correct. Cummins uses TTY bolts

 

[TeaBagger2006]

I've put 167k on my lbz. I'd consider my driving more on the aggresive side.... Then again I do have a lbz. Best of the bunch

 

[Bustedknuckles]

I'm pretty sure James is correct. Cummins uses TTY bolts

I have a set laying on my toolbox. Ill check tomorrow but I'm 99% sure they aren't.

 

[Dirtymaxx03]

They're TTY man.:thumb:

 

[SmokeShow]

Im pretty sure they ARE in fact TTY. This "debate" has been BEAT TO DEATH on the cummins-based forums. It's just been sooo long since I've read up on it, I honestly can't remember the logic behind why it is they may (I say "may" because thats what the whole debate is about - IF the over tightening really helps em seal better) hold up just as good as studs.

 

[Dirtymaxx03]

Well all I know is GM has the headbolt thing figured out lol

 

[JoshH]

I know old 12V trucks are not TTY. They are reusable and TTY bolts are not. I'm not sure about 24V trucks.

 

[Dirtymaxx03]

I think the TTY bolts started with the CR's

 

[Bustedknuckles]

The CR trucks may be. Def wouldn't be surprised on the 6.7 but I'm pretty sure the 24 valves aren't. We torques my brothers head bolts to 135 and they held 55-60 psi just fine. When he went to a billet 66 with a race cover we did studs one at a time just to be safe.

 

[aj43az]

I was told that i need to go back with the same thickness gaskets, but i see thats not what is being done, can anyone help clear up this confusion for me? and wheres a good place to buy the gasket sets?
thx

 

[jacobdewey]

It's a hit and miss. I'm not running studs, and I have a t-3 charger that has to have tremendous dp's. If she pops a gasket now, she deserves to.

 

[AubleAK]

I was told that i need to go back with the same thickness gaskets, but i see thats not what is being done, can anyone help clear up this confusion for me? and wheres a good place to buy the gasket sets?
thx

I've always been told go with grade c head gaskets. Check out merchant automotive for a complete kit.

 

[adeso]

I hurt a HG on my stock engine with the kit on it. Stock fuel system. Water pump was OK when I pulled it

 

[ripmf666]

I was told that i need to go back with the same thickness gaskets, but i see thats not what is being done, can anyone help clear up this confusion for me? and wheres a good place to buy the gasket sets?
thx

Has to do with piston to deck height from block to block. Some motors came with a grade a on one side and a grade b one the othe side from the factory. To make it easy when doing head gaskets the kits that are sold most come with grade c gaskets. If you look at the link and pick out what came off your truck and you can replace what you took off. But most will be taking there heads to have them checked at the machine shop and if there given a clean up pass you will want a thicker gasket then.
http://www.duramaxdiesels.com/forum/showthread.php?t=6148

 

[Mike_S]

so how is it the cummins guys are getting away with more torque on their TTY bolts and holding headgaskets together better than at the factory torque?

if they are in fact tty bolts, they arent. once you surpass the yeild strength of the bolt it actually weakens imensely. they will only stretch so far before they turn into play dough.

 

[DIESELMAFIAPER.LB7]

if they are in fact tty bolts, they arent. once you surpass the yeild strength of the bolt it actually weakens imensely. they will only stretch so far before they turn into play dough.

Correct! But i dont here of people doing this on common rails just 12-24valvevp44 trucks (i could just not hear about cr trucks)

 

[lb7Hoodman]

Thats what I have heard from others also. Boost plus aggressive tuning can result in a failure. So why take the chance? I would do head studs . I bought a set years ago that are sitting in the garage for when the day comes. I bought them so long ago I paid $525 for them to my door! seems I could sell them today and make a profit!

So getting a tune can cause a blown HG?...its all stock tune 100 extra HP...i am currently going to get a headgasket upgrade kit with arp headstuds...is that ok with a stock tune?

Its a DD not a race truck. I havent pulled my motor I have a spare LLY. I just want a fresh motor with more oil pressure and not a shitty injection system. I will probably do a small set of twins and enjoy it as a DD/tow vehicle. I have talked to a few engine builders and for what I am doing studs are unnecessary. I will squish a rod far before I lift the heads.

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[Chevy1925]

So getting a tune can cause a blown HG?...its all stock tune 100 extra HP...i am currently going to get a headgasket upgrade kit with arp headstuds...is that ok with a stock tune?



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you dug up a 4 year old thread and tagged two guys who damn near never post here any more.