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There is lots of speculation as to the cause. Some have even suggesting not starting your car in cold weather, but they won't define what cold weather is....
The symptoms are a "ticking" noise from one bank that will get progressively worse. Oil consumption will go up. Dark tail pipes will be seen. We have compression tested a few motors with very badly scored cylinders and they all make great compression (some how).
The failure on a M96/97 motor seems to begin in the #6 cylinder in our small sample size. A couple of motors have show both #5 and #6 scoring.
We see this problem far more often than a bad IMSB. But, IMSB represents an easily marketed solution to a problem you may or may not ever see... The problem with creating hype about scored cylinders is that the marketable solution to the problem is not 2,000 parts and labour, it is more like 20,000 plus which makes it unmarketable and a waste of energy to promote....
Cheers
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Turn3 Autosport- Full Service and Race Prep
www.turn3autosport.com
997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3
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