ARP Studs 1 @ a Time Torque Procedure
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MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,604
Likes: 149
From: SE Georgia
ARP Studs 1 @ a Time Torque Procedure
Alright, I know many don't believe this is the correct method. Got ya. Please don't bother posting if that's all you have to say. 
I'm at 10,500 miles with zero issues. I am doing the EGR Delete, Coolant Filter and a Coolant Flush over the weekend once I order it all and it all arrives. I'll have 2 days to get the truck done and back on the road. Will also pull the turbo out and clean the vanes while doing the new Up-Pipe.
So what is the best torque procedure for the stud replacement 1 by 1?
I'm at 10,500 miles with zero issues. I am doing the EGR Delete, Coolant Filter and a Coolant Flush over the weekend once I order it all and it all arrives. I'll have 2 days to get the truck done and back on the road. Will also pull the turbo out and clean the vanes while doing the new Up-Pipe.
So what is the best torque procedure for the stud replacement 1 by 1?
Go straight to final torque on each one as replaced?
or
Torque to the value the factory bolts are at, then go to final torque using a torque pattern and 20 ft/lb increments on all 10 bolts (basically as if I had pulled head and was doing fresh torquing)?
I am a Nuclear Mechanic for the Navy and we have procedures for 1 to 1 replacements on our high pressure systems. While not perhaps the best method, it is a viable option that will work.or
Torque to the value the factory bolts are at, then go to final torque using a torque pattern and 20 ft/lb increments on all 10 bolts (basically as if I had pulled head and was doing fresh torquing)?
Again, I know that many frown on this. And if I had even a single indication of problems, I would yank the heads and do this "the proper way".
From my point of view, I can spend a few hours doing this and have years of no worry and no problems. Or I can pull the heads, get them checked/decked and have the truck down for 1-2 weeks...which is not an option at the moment. Worst case, a HG blows and I must re-do this at some point in the future.
So again, please stay on topic
TIA for the help
From my point of view, I can spend a few hours doing this and have years of no worry and no problems. Or I can pull the heads, get them checked/decked and have the truck down for 1-2 weeks...which is not an option at the moment. Worst case, a HG blows and I must re-do this at some point in the future.
So again, please stay on topic
Senior User
Joined: Feb 2005
Posts: 113
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I have no idea on the studs although I have heard of guys doing this successfully. My concern with your plan, although I am no expert, if you are going to flush the system and you use any chemicals like vc-9 you should consider changing the oil cooler as well. Some have had them plug after a VC-9 flush. If just using water I would think your ok. Just a rookies opinion.
Posting Guru
Joined: Aug 2010
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From: knox Tn
Autonuz is correct if you are going that far in do the oil cooler while your there couple hundred bucks and piece of mind. And far as the studs go most will say no but hell that kind of millage i would consider one at a time.
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
The general procedure for replacing fasteners 1 for 1 (as you thought) is to remove a single fastener and torque the replacement to the original torque. I would not go over the original torque *at all* because a stud-nut fastener will give a slightly higher clamping force than a head-bolt due to the less friction loss during tightening.
What we are trying to do, is to not disturb the gasket during the replacement process. Once all the headbolts are replaced, torque to the new torque value using the correct torque sequence.
We used to do 1 for 1 fastener replacements all the time at Pearl Harbor (fellow submariner) and at just about any other repair activity.
This works **only** if the gasket did not leak before the fastener replacement process. Doing this sort of replacement instead of a head removal - inspect - gasket replace process is a personal choice. Any Nuke mechanic should be able to tackle this job.
Lou Braun
What we are trying to do, is to not disturb the gasket during the replacement process. Once all the headbolts are replaced, torque to the new torque value using the correct torque sequence.
We used to do 1 for 1 fastener replacements all the time at Pearl Harbor (fellow submariner) and at just about any other repair activity.
This works **only** if the gasket did not leak before the fastener replacement process. Doing this sort of replacement instead of a head removal - inspect - gasket replace process is a personal choice. Any Nuke mechanic should be able to tackle this job.
Lou Braun
Tuned
Joined: Jun 2006
Posts: 338
Likes: 0
From: Boulder City, Nevada
I think this will work great for you. Others on this site have done it with good results. Now is the time to do it before you have any gasket failure. Even if the gaskets had started to fail it is sure worth a try. Do some research on this site as directions are here.
Tuned
Joined: Feb 2010
Posts: 280
Likes: 0
From: Castalian Springs tn
If the gaskets arn't broke don't fix them. Most of the people who think this is the wrong way never made a living with wrenches. One at a time works for me.
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MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,604
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From: SE Georgia
thx guys. I figured if the process was good for subsafe joints, it was good enough for my truck. I'll replace all the bolts with studs at the current torque, then go through and final torque in increments to the ARP value using the factory pattern
reason I'm doing this is because while the truck doesn't have any issues at the moment, very soon she will be getting tuned and I do drive kinda hard.
reason I'm doing this is because while the truck doesn't have any issues at the moment, very soon she will be getting tuned and I do drive kinda hard.
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Joined: May 2008
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From: Patricia, Alberta
I'm going to do it too. I have a bunch of bad injectors that I'm going to replace, and I'm going to do it while I'm in there. The truck has a lot of miles on it (200,000) but has never had a gasket problem, and I want to tune it. If it doesn't work, I'm not out anything.
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