Head Stud Install - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Performance Parts Discussion Discussion of Performance Parts For the 01-04 LB7 Duramax Trucks No Advertising

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post #1 of 20 (permalink) Old 05-13-2011, 03:52 PM Thread Starter
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Head Stud Install

Ok I've looked and looked do we have a thread about head stud torque specs and procedure?

I've found 95lb and 125lb which one? Also read do it three times does this mean tighten them loosen them three times? I will be doing one at a time.

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post #2 of 20 (permalink) Old 05-13-2011, 04:01 PM
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Do it three times mean torque in stages I dunno the actual torque spec or pattern for dmax heads but if it was 100ft-lbs torque first to 60 then do 80 then 100 ft-lbs. Done a few sbc heads never a dmax tho. Im not sure what you ment by "I will be doing them one at a time" but you need to torque your heads evenly don't go full torque one at a time

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Last edited by Brennan; 05-13-2011 at 04:04 PM.
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post #3 of 20 (permalink) Old 05-13-2011, 04:07 PM
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ARP changed the specs to 125. they want you to torque to 125 then loosen, then repeat 3 more times. iknow alot of guys just torque to 60 then 90 then 125

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post #4 of 20 (permalink) Old 05-13-2011, 04:14 PM
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I didn't think you were supposed to loosen them when doin ARP studs, because of their lube it wasn't necessary


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post #5 of 20 (permalink) Old 05-13-2011, 04:16 PM
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if you torque those bastards to 125ftlbs then re torque them after a couple days of driving its hard to think that they will ever move. idk why they say you have to do all that bullshit

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post #6 of 20 (permalink) Old 05-13-2011, 04:18 PM
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i would think it would be like 60 then 80 then 125 to make sure the head gets pulled down evenly and not smash one side down and maybe not seal correctly

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post #7 of 20 (permalink) Old 05-13-2011, 04:20 PM
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INSTALLATION METHOD FOR HEAD STUD KITS
Part Number: 230-4201 Application: Chevy 6.6L Duramax Diesel
1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser, part number 912-0007 (M12 X 1.5).
2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER.
4. Screw studs into the block “HAND TIGHT ONLY”.
NOTE: LOCTITE MAY BE USED IF A PERMANENT MOUNTING OF THE STUDS IS PREFERRED. THE
FASTENERS, HOWEVER, MUST BE TORQUED PRIOR TO THE LOCTITE SETTING UP.
5. Install the cylinder head(s) and check for binding or misalignment. 6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto the studs and tighten them hand tight. ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.
PRELOAD (TORQUE) RECOMMENDATIONS 7. Following the manufacturers recommended torque sequence tighten the nuts in three equal steps to 125 ft lbs
with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Note: ARP Ultra-Torque Fastener Assembly Lubricant has been specifically designed to reduce tension preload scatter and eliminate the need to cycle high performance engine fasteners before final installation. ARP Ultra-Torque far surpasses all requirements offered by previous ARP lubricants in terms of fastener preload repeatability and performance lubricating properties. For more information on ARP Ultra-Torque visit our website at ARP-bolts.com | The Official Site of Automotive Racing Products, Inc. or call 1 800-826-3045.


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post #8 of 20 (permalink) Old 05-13-2011, 07:59 PM Thread Starter
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Ok that is way too much information for me cainer70 ha ha. So thread bolts in hand tight then tighten them to 125lb three times. Then place washer and nuts and tighten those down three times to 125lbs? Can anyone explain in kids terms ha ha.

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post #9 of 20 (permalink) Old 05-14-2011, 05:40 AM
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Quote:
Originally Posted by DirtyMaxx03 View Post
ARP changed the specs to 125. they want you to torque to 125 then loosen, then repeat 3 more times. iknow alot of guys just torque to 60 then 90 then 125
Just bear with me here but what's the logic behind tightening and loosening three times? I don't quite understand it

06 lly,
Efi From ATP trucks,
5" straight pipe, egr blocked, cognito ucas,
rare parts gen2, bilstein 5100s, all season brace,
merchant pump rub fix, drp trans cooler lines,
air dogII 165
http://performancetruckproducts.com/
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post #10 of 20 (permalink) Old 05-14-2011, 05:59 AM
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Quote:
Originally Posted by Brennan View Post
Just bear with me here but what's the logic behind tightening and loosening three times? I don't quite understand it
To allow for any natural stretch in the bolts.
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