How to install ARP head studs?
Senior User
Joined: Apr 2012
Posts: 424
Likes: 0
stud install
All is good info so far... But something needs to be nipped in the bud, its something somebody made up, and doesnt do anything... That is backing the bolts off in sequence... I zipped my heads off without paying attention, didnt do anything, and there is many more setups out there and not that are the same way...
I idea of the sequence of torquing is to lay the head on the gasket evenly, and thats it... The casting itself is plenty strong to take the forces of the bolts... Unless you plan to reuse the HG's and not pull the heads, in which you have to do one bolt/stud at a time, the reverse sequence is over-****, and unecessary...
Just sayin'
I idea of the sequence of torquing is to lay the head on the gasket evenly, and thats it... The casting itself is plenty strong to take the forces of the bolts... Unless you plan to reuse the HG's and not pull the heads, in which you have to do one bolt/stud at a time, the reverse sequence is over-****, and unecessary...
Just sayin'
Got my studs the other day, gonna put it in the shop tuesday...sooo. Im gonna torque the heads in 4 sequences to 110lb. like 70 80 90 110.
let me get this staight before I mess up lol. I torque to 70lbs. then back the nut off, then torque up to 80lbs. and repeat untill I get to 110. sound good?? I want to get this right the first time, thats what all the ?'s are for
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
In sequential order and in 4 steps, you bring the torque up to the 110ftlb. Then in reverse order you back them all down in steps. Finally you do the process all over again 4 more times to complete the process properly. This is necessary and recommended by ARP. The process not only properly seats the head and gasket to the deck of the block, but also seats the threads and brings up the studs to their yield evenly to prevent any future failure.
Postmaster
Joined: Dec 2004
Posts: 2,941
Likes: 30
From: Maple Valley, WA
125ft/lbs is just fine for the studs. Mine are at 150 ft/lbs...
Remember, the more clamp load you have, the less of a chance you will have of gasket problems... Only thing that keeps me from going even higher yet is breaking a stud.
Remember, the more clamp load you have, the less of a chance you will have of gasket problems... Only thing that keeps me from going even higher yet is breaking a stud.
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
you do each torque sequence in a row, do not do any backing off.
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
I've read this repeatedly to try to understand what you're doing.
follow the ARP sequence and steps, and if you want to go over, go over by about 5lbs at a time.
What is all this loosening of the nuts business?
Senior User
Joined: Dec 2010
Posts: 245
Likes: 0
From: Salome Arizona
On mine I went 70 80 90 100, then in sequence at 100 did it 3 more times no loosening of anything. It's been golden ever since.
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Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
well I'm curious if you're confusing what a lot of the oil burners, and some people here used to say..
Having to torque and loosen like 4 or 5 times to break the thread in. If you use ARP lube there is absolutely no need for that, it will hit target clamp load on the first set.
Having to torque and loosen like 4 or 5 times to break the thread in. If you use ARP lube there is absolutely no need for that, it will hit target clamp load on the first set.
Senior User
Joined: Dec 2010
Posts: 245
Likes: 0
From: Salome Arizona
Yes double that on the arp lube. I talked to their factory rep when I did mine. he said there lube will keep the stud's in place and still alow for easy removal just get them snug with the allen wrench, as you torque the head in place some of the stud's will tighten into the block a littel more as you bring it up to your desired ft #'s, pretty easy job to do with the engine out.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
For a 7.3 it's 125. 6.9 calls for 85 but I brought mine upto 110. My 6.9 hits 22psi of boost with no issues.
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
I do 35+psi regularly.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
Yes double that on the arp lube. I talked to their factory rep when I did mine. he said there lube will keep the stud's in place and still alow for easy removal just get them snug with the allen wrench, as you torque the head in place some of the stud's will tighten into the block a littel more as you bring it up to your desired ft #'s, pretty easy job to do with the engine out.