How to break in new clutch - BMW M5 Forum and M6 Forums
E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum

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post #1 of 7 Old 9th March 2017, 03:16 AM Thread Starter
jtl9729
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How to break in new clutch

What's the group advice on the right way to break in a new clutch? And is there any consensus on how many miles it will take before a WOT start is okay?

I realize driving style, location etc would affect the miles number so let's assume city driving, typical stop and go stuff.


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post #2 of 7 Old 9th March 2017, 03:54 AM
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I would do 500 miles of regular driving, you are looking to shift at different rpms a lot for the disc to seat with the flywheel properly. Now total miles depends, 500 miles on a freeway same gear won't do the trick, again you are looking to shift a lot at different engine speeds for give or take 500 miles.

Last edited by Silver///M5; 9th March 2017 at 05:45 AM.
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post #3 of 7 Old 9th March 2017, 05:30 AM
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BMW i believe says to break it in as a new car break in.. That would be 1200 miles.. But if you do alot of stop and go city driving that can be cut some for sure.
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post #4 of 7 Old 9th March 2017, 06:11 AM Thread Starter
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So far I've done as follows with 70% street and 30% freeway but with the caveat that LA area freeways are basically the same as city street driving .
0-200 miles - always S-5 mode, P400, 30% throttle max (Prious's were running around me lol), shift before 3500rpm, manual downshifts through every gear every time
200-400 miles - 50% throttle, P400, shift about 4500rpm, manual downshift still

I'm at 450 miles and have yet to hit the M button but my trigger finger is getting itchy. Not enough to ruin my investment though and it's been long enough that I've nearly forgot what it's like unleashed so I'm going to fall in love with this machine all over again soon. But I want to fall in love sooner than later so all advice is appreciated.


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post #5 of 7 Old 9th March 2017, 01:08 PM
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How to break in new clutch

I did 800 miles on mine before I started to beat on it and let just say I'm in need of rear tires now....lol


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post #6 of 7 Old 10th March 2017, 01:28 AM
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FWIW, BMW published empirical data for the E39 M5/E52 Z8 clutch, and they specified 800-1000 shifts done under light to moderate conditions. Mileage is irrelevant according to them. Following something similar with the E60 (or any other car for that matter) is reasonable.

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Chuck



Quote:
BMW AG - TIS
RA: Breaking in SAC clutch

Issue status (03/2002)

Break in the friction linings of the clutch by applying light to medium loads, in the same way as for brake linings. This preconditioning creates a carbon layer between lining and metal friction surface which in the end generates the necessary coefficient of friction. Breaking in can take the form of either normal driving with many gearshifts or a specific breaking-in program on gentle gradients.

"Normal" driving will not damage the clutch. "Normal" driving conditions involve drive-off speeds of up to approx. 2500 rpm on a medium gradient, e.g. when driving onto a transporter. Normal driving off on a level surface at speeds up to approx. 2000 rpm are likewise sufficient.

Sporting driving maneuvers will destroy a new clutch! These include driving maneuvers at high differential speeds, overlaps or very high drive-off speeds, e.g. when driving onto a transporter.

When a vehicle is moved "normally", an empirically established figure of approx. 800-1000 gearshifts is applicable to an optimally broken-in lining.

Please conduct the following breaking-in program in order to avoid later customer complaints:

* specifically for M5 and Z8 vehicles

Breaking-in program for approx. 30 km on road

Vehicle subject to "moderate" shifting processes

Drive off at max. 2000 rpm; upshift 1->2, 2->3, 3->4; upshift at 3500-4000 rpm, downshift 4->3, 3->2, 2->1, downshift at 2000 rpm

Drive off 3 to 5 times on a gentle gradient up to approx. 12%, drive-off speed max. 2000 rpm

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post #7 of 7 Old 10th March 2017, 08:57 PM
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Just ease it in...start slow and cautious and then...well....enjoy

Last edited by RockChalkKU; 10th March 2017 at 08:58 PM.
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