Bearing Update - Replaced at 17,000 Miles

pbonsalb · 03-12-2018, 12:45 PM

I think the stock rod bolt torque procedure is much worse on the S65 than on the S54. The S65 procedure is 3 stage tightening 3 times per bolt, obviously with 2 loosenings in between. Maybe to pre stretch the bolts? With 2 more cylinders as well. It is a lit of separate actions. Not counting removal of original bolt, it’s 11 actions per bolt. Times 16 for the 16 bolts, it’s 176 stages of loosening and tightening.

SYT_Shadow · 03-12-2018, 01:50 PM

Quote:

Originally Posted by pbonsalb

I think the stock rod bolt torque procedure is much worse on the S65 than on the S54. The S65 procedure is 3 stage tightening 3 times per bolt, obviously with 2 loosenings in between. Maybe to pre stretch the bolts? With 2 more cylinders as well. It is a lit of separate actions. Not counting removal of original bolt, it’s 11 actions per bolt. Times 16 for the 16 bolts, it’s 176 stages of loosening and tightening.

agreed. It is completely insane...

I would happily bet money that no shop does it correctly

pbonsalb · 03-12-2018, 02:27 PM

I think anyone can do it but it needs care and patience. On a fixed labor price bearing change, the shop is going to make more money getting its customer to pay extra for ARPs that require an hour less labor to install. And for the customer paying by the hour for labor, the added cost of the ARPs is probably a wash against the saved labor.

I saved the $200 on fancy bolts when I did mine, plus the only ARPs out in 2014 may have had issues if torqued to ARPs spec. If I do the job again, I’d probably use ARP. I helped someone do the job with ARPs from VAC that supposedly provide the correct torque and it was much easier. Probably saved an hour over the factory bolts.

330ciprem · 03-12-2018, 06:42 PM

Quote:

Originally Posted by pbonsalb

I think anyone can do it but it needs care and patience. On a fixed labor price bearing change, the shop is going to make more money getting its customer to pay extra for ARPs that require an hour less labor to install. And for the customer paying by the hour for labor, the added cost of the ARPs is probably a wash against the saved labor.

I saved the $200 on fancy bolts when I did mine, plus the only ARPs out in 2014 may have had issues if torqued to ARPs spec. If I do the job again, I’d probably use ARP. I helped someone do the job with ARPs from VAC that supposedly provide the correct torque and it was much easier. Probably saved an hour over the factory bolts.

Why does it require one hour less for the ARP bolts?

pbonsalb · 03-12-2018, 07:12 PM

Read 4 posts up.

330ciprem · 03-14-2018, 04:49 AM

Quote:

Originally Posted by pbonsalb

Read 4 posts up.

So I am assuming it doesn't require the multi-stage torqueing for the ARP bolts?

Scharbag · 03-14-2018, 06:43 AM

ARP is torque to target in 1 step per bolt. Easy peasy. Far less chance for error. Also, ARP can be re-used for a reasonable number of times.

330ciprem · 03-14-2018, 06:51 AM

Quote:

Originally Posted by Scharbag

ARP is torque to target in 1 step per bolt. Easy peasy. Far less chance for error. Also, ARP can be re-used for a reasonable number of times.

Thank you.

03-12-2018, 12:45 PM	#45
pbonsalb Lieutenant General 7679 Rep 13,759 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	I think the stock rod bolt torque procedure is much worse on the S65 than on the S54. The S65 procedure is 3 stage tightening 3 times per bolt, obviously with 2 loosenings in between. Maybe to pre stretch the bolts? With 2 more cylinders as well. It is a lit of separate actions. Not counting removal of original bolt, it’s 11 actions per bolt. Times 16 for the 16 bolts, it’s 176 stages of loosening and tightening.
	Appreciate 1 SYT_Shadow12759.50 Quote

03-12-2018, 02:27 PM	#47
pbonsalb Lieutenant General 7679 Rep 13,759 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	I think anyone can do it but it needs care and patience. On a fixed labor price bearing change, the shop is going to make more money getting its customer to pay extra for ARPs that require an hour less labor to install. And for the customer paying by the hour for labor, the added cost of the ARPs is probably a wash against the saved labor. I saved the $200 on fancy bolts when I did mine, plus the only ARPs out in 2014 may have had issues if torqued to ARPs spec. If I do the job again, I’d probably use ARP. I helped someone do the job with ARPs from VAC that supposedly provide the correct torque and it was much easier. Probably saved an hour over the factory bolts.
	Appreciate 0 Quote

03-12-2018, 07:12 PM	#49
pbonsalb Lieutenant General 7679 Rep 13,759 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Read 4 posts up.
	Appreciate 1 Todd0131371.50 Quote

03-14-2018, 06:43 AM	#51
Scharbag Colonel 2795 Rep 2,188 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	ARP is torque to target in 1 step per bolt. Easy peasy. Far less chance for error. Also, ARP can be re-used for a reasonable number of times.
	Appreciate 1 330ciprem240.00 Quote