Stiffening plate removal / reinstallation

[andrewwynn]

WFHV10YLW

BTP10X55BLK

WNORD10

NRHH10BLK

I bought enough for both of our e53 and a couple spares for $65 with shipping.

BMW crushed the nut into an oval to make it locking I ordered nordlock washers instead.

12.9 @ 80 N·m is a good match for
10.9 @ 65 + 90° (TTY)

The 12.9 at 80 N·m can be used indefinitely. Technically you'll lose clamping force on reuse if not lubricated so 60 N·m with some good moly grease for consistent clamping force.

[Factory6speed]

Nice thanks guys. Andrew I read most of what you put on the past several pages, really good stuff. Thanks

I have a bunch of that ARP ultra torque I'll throw on there. I kept getting wrong numbers on the main bearing clearances until I used an ample amount of that stuff. At one point or two there would be that skipping. Surprising what a difference all this clamping force talk really makes. I'm glad we're on to page 26 on these stupid bolts.

The first time I encountered these back in December, three of them were loose/finger tight. Unknown how many times they've been used. I reused once and went the full 56nm 90°. which was wrong. The last part of that 90 felt questionable, I got lucky. So these ones are cooked.

Looks like 6 bolts washers and 12 nuts runs about $23 shipped. Which is what BMW is gouging for one bolt. Interesting. I think they want to save the supply.

[andrewwynn]

There are only a couple things "special" about those bolts:

• Captive washer
• Crushed nut

You can get 10.9 bolts the correct length and non captive washers and install to spec you def don't need the blessed BMW bolts to TTY. I would recommend using Nord Lock though the amount of tension is phenomenal it likely is fine without any locking.

OR: if you upgrade to 12.9 you get almost exactly the same clamping force with spec torque. If you use molly grease you can reuse indefinitely and get spec clamping force.

Almost everybody that wrenches has gotten to that uneasy feeling of a bolt turning but not getting more difficult.

Somebody above suggested using the source jointing torque and 45° vs. 90°

It’s stunning how fast the clamping force drops off when not pushing to yield but it’s far better than “finger tight” or “two ugga dugga” which will convert a suspension part into a dust shield.

I've driven e53 without the plate plenty to know it most certainly stiffens the suspension as the name explains. Without the crazy tension from the bolts the plate will just move under the bolt heads and stop doing its job.

[workingonit]

Originally Posted by andrewwynn

WFHV10YLW

BTP10X55BLK

WNORD10

NRHH10BLK

I bought enough for both of our e53 and a couple spares for $65 with shipping.

BMW crushed the nut into an oval to make it locking I ordered nordlock washers instead.

12.9 @ 80 N·m is a good match for
10.9 @ 65 + 90° (TTY)

The 12.9 at 80 N·m can be used indefinitely. Technically you'll lose clamping force on reuse if not lubricated so 60 N·m with some good moly grease for consistent clamping force.

Translation needed for the four lines at the top, please.

Or better still, can you post the exact order you made for the items? It would be perfect for my wishlist.

[Fifty150hs]

Originally Posted by workingonit

Translation needed for the four lines at the top, please.

Or better still, can you post the exact order you made for the items? It would be perfect for my wishlist.

If you put each of those in the search box at Belmetric.com it will take you to exactly the bolts/nuts/washers ordered.

[andrewwynn]

Yeah sorry I didn't have the time to make links. I copied from my invoice email.