Head bolts from 100ft/lbs to 130ft/lbs

madmikeismad

madmikeismad

So mad
Joined
Dec 19, 2009
Messages
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Most turned only about a 1/4 turn. A couple turned a good full turn.

Is this normal?
 
I always go by degrees rather than torque. Torque is a measurement of resistance, dry threads create higher resistance...
 
A full turn sounds like quite a bit....were those the longer ones?
 
LReiff said:
I always go by degrees rather than torque. Torque is a measurement of resistance, dry threads create higher resistance...
Click to expand...

I used some moly grease I found in the shop, and applied liberally to the threads when I installed the other day. Today was just a retorque. Motor is cold by the way.

JQmile said:
A full turn sounds like quite a bit....were those the longer ones?
Click to expand...

Good point. I think they all were the longer rocker bolts. Shorter ones on the hot side almost didn't turn at all.


Also, for the rear 2 rocker studs, I can't fit the tq wrench in there, so I used a smaller 3/8's ratchet with equivalent socket, and just turned it until it felt a little tighter than the other ones. Granted I was going off how tight they felt with my arm, but I think I got pretty damn close. Think I'll be alright? Shouldn't ever go over 60psi DP.
 
It's going to explode in pink flames LOL. I like to go to 145 but do it very slowly.
 
Aftermarket bolts. Stronger than stock, but not up to stud strengths. I can't remember what they are rated at anymore, I've had them sitting around for a while. Not one of them stretched though.
 
1 full turn is normal.

If I were you, I'd torque them up to 150 ft lbs. No need to loosen them, just set the wrench to 135 ft lbs and hit them all again. Wait a few minutes, then hit all of them with 140 ft lbs..... follow until you reach your desired torque.
 
Well, they're all at about 140 now. I'll do another retorque in a few weeks when I work up the ambition to pull the covers and lines again.
 
5 ftlb increments after 130 in regular sequence and give the threads time to cool off between tourqes. Gives you time to drink a few and get back to work lol. I read this is how garmon does it but can't speak for him.

Dang got treeded
 
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When I did mine from 100 to 125 on my 89, the longer ones turned 1/2 to 3/4 turn, and the shorter ones turned maybe 1/4 or a little more. I'd say you're probably fine. Time to hit it with some nitrous LOL
 
Haha, not this truck. I don't think the axles would like it with these tires. I want to stay at whatever power level I'm at now, and just tune for more. 600 would make me very happy with this truck, but I really don't see it happening.

The dually on the other hand...... :D


EDIT: On second thought, anyone know how much torque a 2in extension would take from you? Because I'd be at around 140 now, minus the 2in extension
 
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madmikeismad said:
Haha, not this truck. I don't think the axles would like it with these tires. I want to stay at whatever power level I'm at now, and just tune for more. 600 would make me very happy with this truck, but I really don't see it happening.

The dually on the other hand...... :D


EDIT: On second thought, anyone know how much torque a 2in extension would take from you? Because I'd be at around 140 now, minus the 2in extension
Click to expand...

Extensions will decrease torque if you use them on an impact, something with spikes of force. A smooth constant pull, like should be done on a torque wrench, will be zero. You just have to pull a bit farther, since you're twisting the extension.

As for your long bolts turning more, keep in mind the rocker pedestal bolts/studs are 2.5 times longer than the short ones. So they will stretch 2.5 times more, and thus turn 2.5 times more.
 
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