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Board index » Jeep CRD / E85 / Alternative Fuels » Liberty CRD...Love that Torque!!!

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Gavaldi
 Post subject: Wrong sequence used on head studs
PostPosted: Fri Jan 12, 2024 3:06 pm 
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Posts: 2
Hi all. I'm doing a top end rebuild and just got the head back on. I have been very careful throughout this
whole process. For some reason when I started tightening down the ARP head studs, I grabbed the page
that came with the head gasket. It has a tightening sequence printed on it so I used that. Now I find out
that ARP head studs have their own sequence. My question is do I need to buy a new gasket and start over,
or am I okay as is? Also, can I loosen the studs and retighten them in the correct order without replacing the
head gasket?
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WWDiesel
 Post subject: Re: Wrong sequence used on head studs
PostPosted: Fri Jan 12, 2024 4:49 pm 
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This is what I have on file, hope it helps?
If this is not correct, maybe one of the experts will chime in?

Quote:
ARP Head Studs Install Instructions

Per ARP regarding the proper way to torque the studs.
Blow out any debris that is in the holes.

    1. Install a bone-dry stud into a bone-dry block and chase the threads with the stud up and down a few times to clean the threads.
    2. Place a bone-dry washer on the bone-dry head.
    3. Place a dab of lube on the upper part of the washer only, the bottom part of the washer must be bone dry.
    4. Place a small dab of lube on the bottom of the nut.
    5. Place a small dab of lube on the fine threads of the stud and screw the nut on till it reaches the top of the washer.
    6. Use a small wrench to hand tighten the nut onto the head.
    7. Using the proper torque wrench begin torquing the nuts in three separate torque sequences waiting 60 seconds between torques until the desired torque is reached.

Wait several minutes between each torque value.
Then wait 12 hrs. and recheck all torque values before final assembly.

Image

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Gavaldi
 Post subject: Re: Wrong sequence used on head studs
PostPosted: Sat Jan 13, 2024 1:21 am 
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Joined: Mon Nov 20, 2023 12:27 am
Posts: 2
Thanks. Jim Hulse got me lined out. Turns out the torque increments are more
important than the specific pattern you use.
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taroo
 Post subject: Re: Wrong sequence used on head studs
PostPosted: Mon Jan 15, 2024 9:52 pm 
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Joined: Sun Apr 27, 2008 2:14 pm
Posts: 278
That’s what I used 7 years ago and all is well.

WWDiesel wrote:
This is what I have on file, hope it helps?
If this is not correct, maybe one of the experts will chime in?

Quote:
ARP Head Studs Install Instructions

Per ARP regarding the proper way to torque the studs.
Blow out any debris that is in the holes.

    1. Install a bone-dry stud into a bone-dry block and chase the threads with the stud up and down a few times to clean the threads.
    2. Place a bone-dry washer on the bone-dry head.
    3. Place a dab of lube on the upper part of the washer only, the bottom part of the washer must be bone dry.
    4. Place a small dab of lube on the bottom of the nut.
    5. Place a small dab of lube on the fine threads of the stud and screw the nut on till it reaches the top of the washer.
    6. Use a small wrench to hand tighten the nut onto the head.
    7. Using the proper torque wrench begin torquing the nuts in three separate torque sequences waiting 60 seconds between torques until the desired torque is reached.

Wait several minutes between each torque value.
Then wait 12 hrs. and recheck all torque values before final assembly.

Image

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