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      10-17-2014, 04:00 AM   #1
X88RED
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Question New Clutch and Flywheel Procedure

Hello,

Was just wondering what the correct procedure actually is for breaking in a new standard clutch and flywheel for an E92 M3, as all the info on this really seems to contradict itself.

Some say drive like a granny for 500 miles, in the instruction manual BMW recommends 300 miles of engaging the clutch gently (are they just saying this to cover their backs?), some say 100 miles then some people say no break in period is needed??

To be honest I never even realised I had to break in a new clutch and flywheel so I have done the odd high rev shift and have given the car the odd quick start with some wheel spin but no burnouts/ dumps. Have I caused any likely damage?!

Thanks!
Redmond
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      10-17-2014, 06:15 AM   #2
anom3
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from what i recall its actually not a question of how many miles.

its actually a question of number of gear changes.

i remember there is a bmw bulletin that states something like "1000 gear changes".

dont quote me on the 1000 tho... going to have to find the bulletin / post stating so yourself as i dont remember the actual #

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Originally Posted by X88RED View Post
Hello,

Was just wondering what the correct procedure actually is for breaking in a new standard clutch and flywheel for an E92 M3, as all the info on this really seems to contradict itself.

Some say drive like a granny for 500 miles, in the instruction manual BMW recommends 300 miles of engaging the clutch gently (are they just saying this to cover their backs?), some say 100 miles then some people say no break in period is needed??

To be honest I never even realised I had to break in a new clutch and flywheel so I have done the odd high rev shift and have given the car the odd quick start with some wheel spin but no burnouts/ dumps. Have I caused any likely damage?!

Thanks!
Redmond
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      10-17-2014, 07:52 AM   #3
s85e90
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Just be easy on the clutch for a few hundred miles. Even 100 miles should be fine. Don't know where gear change theory came to ligjt.
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      10-17-2014, 08:17 AM   #4
pbonsalb
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Southbend told me that the number of engagements are more important than the miles.
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      10-19-2014, 12:16 PM   #5
douglee25
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Making gear changes actually slips the clutch and causes friction material to be deposited on the flywheel face. You actually WANT to slip the clutch to break things in. It's similar to bedding in brakes.

Doug
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