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Cylinder head stud installing torque#...anyone know?
Posted: Tue Nov 18, 2003 2:25 pm
by WJR
When installing the 4 cylinder head studs into the engine case, how much torque to I use to seat the studs? Or are they just "finger tight" and loctited?
Thanks,
WJR
Posted: Tue Nov 18, 2003 2:48 pm
by Jammer72
That's a very good question. I just bought a motor that has a crack in the case from a stud being overtightend. Gonna have to get the case repaired. Haydug if you read this chime in since you'll be doing my motor.:head:
Posted: Tue Nov 18, 2003 8:52 pm
by southbaymoto
We do not generally tq the studs, you do tq. the nuts with the head on. Our spec. is 37 ft lbs. The stud needs to be checked to make sure it is bottoming out and no threads are showing. You need to use ind. grade red loc-tite on the studs. If you over tighten or try to tq. the studs you are sure to strip the threads. If you do pull the threads through a timesert will work to correct the issue.
Dustin
SBM
Torques
Posted: Tue Nov 18, 2003 8:57 pm
by cannondale27
Helper studs
stage 1- 8.1lbf.ft
" 2- 16.2 lbf.ft
Head stud nuts
stage 1- 16.2
" 2- 25.8
" 3- 31.0
Posted: Wed Nov 19, 2003 5:00 am
by WJR
Thank you!
WJR
Posted: Wed Nov 19, 2003 12:54 pm
by cannondale27
WJR,
I'm sorry I read both posts one was addressing just the studs which you should follow Dustins advice.For the nuts do the torques I listed.Dustin and I must have been posting at same time.
Posted: Wed Nov 19, 2003 12:59 pm
by Big Winky
37# in the case (12mm) like Dustin said, 31# on the head stud nut (10mm). although I use the green locktite in the case (for permament installation). your motor is done WJ, I'll send you some green locktite with it, if you want.
Posted: Wed Nov 19, 2003 5:03 pm
by WJR
QUOTE
your motor is done
NOW I AM STOKED. YES I AM YELLING.
Jim, A bottle of green locktite would be great! I can;t recall seeing the green stuff--permanent sounds good to me.
WJR