Z4M Vanos Sprocket

wyatth · 12-14-2011, 10:31 AM

I understand the cars share the S54. I read on M3F that the vanos bolts used on the Z4M are actually stronger and can prevent problems. But I am wondering if the vanos sprocket is the exact same? Seems tabs are breaking off more often on the M3s and I wondering if it's because the sample size of the Z4M market is too small to show it yet, or if the Z4M cars have too few miles on them to get an accurate showing, or if the part also was changed (harder metal) for engines latest iteration. Thanks!

Can read more about the failures here:
http://www.m3forum.net/m3forum/showthread.php?t=389200

Searched this forum and I found one foul experience and some other members saying they "think" the Z cars have harder tabs. Just wondering if anybody has newer/confirmed information.

O-cha · 12-14-2011, 10:41 AM

They are the same part, whether or not the metallurgy is better no one on this or other forums could know.

wyatth · 12-14-2011, 10:50 AM

Thanks! I'd imagine it has identical strength, then.

Might as well plug this here then:
http://www.m3forum.net/m3forum/showthread.php?t=225780

12-14-2011, 10:31 AM	#1
wyatth Colonel 3549 Rep 2,824 Posts Drives: E90 ZCP Join Date: Dec 2007 Location: Bay Area iTrader: (0)	Z4M Vanos Sprocket - Same as M3? I understand the cars share the S54. I read on M3F that the vanos bolts used on the Z4M are actually stronger and can prevent problems. But I am wondering if the vanos sprocket is the exact same? Seems tabs are breaking off more often on the M3s and I wondering if it's because the sample size of the Z4M market is too small to show it yet, or if the Z4M cars have too few miles on them to get an accurate showing, or if the part also was changed (harder metal) for engines latest iteration. Thanks! Can read more about the failures here: http://www.m3forum.net/m3forum/showthread.php?t=389200 Searched this forum and I found one foul experience and some other members saying they "think" the Z cars have harder tabs. Just wondering if anybody has newer/confirmed information. Last edited by wyatth; 12-14-2011 at 10:39 AM..
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12-14-2011, 10:41 AM	#2
O-cha Brigadier General 218 Rep 4,726 Posts Drives: Mcoupe Join Date: Oct 2007 Location: In front of you iTrader: (2)	They are the same part, whether or not the metallurgy is better no one on this or other forums could know. __________________
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12-14-2011, 10:50 AM	#3
wyatth Colonel 3549 Rep 2,824 Posts Drives: E90 ZCP Join Date: Dec 2007 Location: Bay Area iTrader: (0)	Thanks! I'd imagine it has identical strength, then. Might as well plug this here then: http://www.m3forum.net/m3forum/showthread.php?t=225780
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