Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: flywheel bolt torque...please read

+ Reply To Thread
Posts: 1-10 of 34
2011-08-14 15:37:01
#1
flywheel bolt torque...please read
in searching i have found 61-69 ft lbs for an sr20de. ive also found upwards close to 100ft lbs for an sr20DET......what about a turboed sr20, or sr20de+t? are we torquing the bolts per bolt spec or HP spec? i know my buddys det is a 19mm 12 point bolt and my de has a 14mm 12 point bolt.
2011-08-14 16:26:21
#2
I always use the fsm spec of 61-69lbft on fwd motors. I also use loctite on the flywheel bolts. I have never had a issue with them backing out. I will be putting my flywheel on my ve-t today.
2011-08-14 16:50:12
#3
61-69 is correct, the DET (GRIR) uses 11mm bolts so that could be why its higher...I always use red loctite as well.
2011-08-14 17:17:16
#4
Torque them to the 61-69 ft-lbs.

Or do what I did and remember it wrong, and torque them to 90 ft-lbs and worry about them for months.
2011-08-14 17:55:37
#5
Ben, explain? I went mid point and torqued to 80ft lbs.
2011-08-14 17:56:18
#6
The tranny is still on the floor and clutch not yet bolted on.
2011-08-14 17:59:00
#7
take the bolts back out and torque them to the correct spec using loctite. over torquing can cause the bolts to stretch and fail. I have seen flywheel bolts break and the flywheel come off due to this.
2011-08-14 18:00:01
#8
Originally Posted by 93specv
Ben, explain? I went mid point and torqued to 80ft lbs.

Uhh... Don't do that... I said to torque to 61-69.

I was just saying how I'm an idiot and remembered the torque spec wrong, so I torqued to 90-something. Way too high. And for a long time, I've been worried about them. So far, so good, but I wish I hadn't done that.

Also, the bolts are torque-to-yield bolts, so technically you should buy new ones every time. Once you torque them once they are not to be re-used.

However, you can get around that limitation by torquing a bit higher than spec. Maybe 75 ft-lbs if you're really in a pinch. A lot of us have done similar and not had any problems. Not the best way to do it though.
2011-08-14 18:09:40
#9
Hmm....including from factory, this will be the 3rd time that I know of these bolts have been torqued. I originally got the motor used.
2011-08-14 18:11:47
#10
Originally Posted by 93specv
Hmm....including from factory, this will be the 3rd time that I know of these bolts have been torqued. I originally got the motor used.


Measure the stretch on them. I have reused bolts a few times but I inspect them first. As long a the threads are in good condition and the stretch is with in spec I will reuse them.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top