Flywheel to crank bolts "feel" stripped
#1
Flywheel to crank bolts "feel" stripped
Hi all,
Does anyone have experience with the flywheel bolts or crankshaft threads stripping when you torque them down? I'm in the middle of a clutch replacement on my '08 Clubman non-S and am at the point where I'm torquing the bolts to mount the new flywheel on the crankshaft. It's a Luk flywheel and I'm using the existing bolts. I cleaned the old threadlocker off of them with a wire brush.
When I get up to around 60 lbs, I feel like the bolts are turning too much to make it to the proper torque setting of 66. I've had bolts snap on me before, and this just feels like a couple of the bolts are going to snap or just start spinning in a stripped hold on the crank. I can remove the bolts and get them back up to 60, but getting to 66 feels like they're turning too much and are going to strip.
Am I just being paranoid? The clutch I took out was a Valeo, so someone has previously done a replacement, so I wonder if they stripped some bolts when doing that one.
Any thoughts or advice?
Thanks,
Nick
Does anyone have experience with the flywheel bolts or crankshaft threads stripping when you torque them down? I'm in the middle of a clutch replacement on my '08 Clubman non-S and am at the point where I'm torquing the bolts to mount the new flywheel on the crankshaft. It's a Luk flywheel and I'm using the existing bolts. I cleaned the old threadlocker off of them with a wire brush.
When I get up to around 60 lbs, I feel like the bolts are turning too much to make it to the proper torque setting of 66. I've had bolts snap on me before, and this just feels like a couple of the bolts are going to snap or just start spinning in a stripped hold on the crank. I can remove the bolts and get them back up to 60, but getting to 66 feels like they're turning too much and are going to strip.
Am I just being paranoid? The clutch I took out was a Valeo, so someone has previously done a replacement, so I wonder if they stripped some bolts when doing that one.
Any thoughts or advice?
Thanks,
Nick
#3
#4
Thanks to both of you - I asked about the bolts when I was ordered parts and was told that I could re-use them. I'll order new ones.
And I've seen a couple different places online that say 66 ft=lbs for torquing the bolts. From what I can see from MiniToBe's answer, it appears the procedure is 30Nm and then 90 degrees for final torque. Does that sound right to everyone? Just want to make sure I get this right before closing her up.
Thanks again,
Nick
And I've seen a couple different places online that say 66 ft=lbs for torquing the bolts. From what I can see from MiniToBe's answer, it appears the procedure is 30Nm and then 90 degrees for final torque. Does that sound right to everyone? Just want to make sure I get this right before closing her up.
Thanks again,
Nick
#8
Hi all,
Sorry to drag this out, but I don't want to make a mistake that's going to cause me huge problems down the road.
Does that torque spec apply to the bolts I'm buying from Pelican parts? I have 6 of them, part number 11-22-7-560-062-M26.
I really hate there TTY bolts; I always feel like I'm going to strip them. Thanks for the information.
Nick
Sorry to drag this out, but I don't want to make a mistake that's going to cause me huge problems down the road.
Does that torque spec apply to the bolts I'm buying from Pelican parts? I have 6 of them, part number 11-22-7-560-062-M26.
I really hate there TTY bolts; I always feel like I'm going to strip them. Thanks for the information.
Nick
#9
Hi all,
Sorry to drag this out, but I don't want to make a mistake that's going to cause me huge problems down the road.
Does that torque spec apply to the bolts I'm buying from Pelican parts? I have 6 of them, part number 11-22-7-560-062-M26.
I really hate there TTY bolts; I always feel like I'm going to strip them. Thanks for the information.
Nick
Sorry to drag this out, but I don't want to make a mistake that's going to cause me huge problems down the road.
Does that torque spec apply to the bolts I'm buying from Pelican parts? I have 6 of them, part number 11-22-7-560-062-M26.
I really hate there TTY bolts; I always feel like I'm going to strip them. Thanks for the information.
Nick
I know Haynes isn't the best manual around but it helps.
The following users liked this post:
PelicanParts.com (03-13-2019)
#10
Personally, I don’t like that 1/4 turn business. If you torque to a value, you can get the value wrong or the torque wrench can be out of calibration. That means 2 sources of error. However, if you add the 1/4 turn, that adds another source of error because you may or may not hit the 1/4 turn.
2 possible sources of error is much better than 3 possible sources...
2 possible sources of error is much better than 3 possible sources...
#11
#12
I got the bolts from Pelican Parts, and was able to get them torqued according to the specs secondhandr55 posted. I used the stock Mini bolts with no issues.
#13
In my case the Genuine MINI bolts I bought doesn't fit; way too long. (btw, this is a Gen1 car). It's a shame that Valeo do not sell anything other than their kit.
At this point my options are limited to either buy a new Valeo clutch kit or use the old bolts :(
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