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Old 27-09-2017, 11:58 PM   #41
Chad
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Quote:
Originally Posted by Monkey View Post
Hi Chad,

Can you feel that pick up with a sharp pick? or your finger nail? If so it would need some attention. You'd also have to measure it with the plastiguage to see if its excessively worn, and to determine which shells you put in when you put it back together.
Hi James. Yes you can definitely feel some light pickup with finger nail, but doesn't appear to affect measurements, As in photo, interesting thing pickup arrears to be mainly on rod bearing 3 and 4. Also mains bearings either side and centre, appear to take the most abuse. And sprocket side no 1 main bearings is slightly the most warn . Out of interest, a a local engine shop recon this pickup on crank bearings faces should polish up perfectly, out of interest including some photographs , measurements taken and close up photos ..what's your take on measurements, regarding shells! I'm thinking refitting std shells...
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Last edited by Chad; 13-10-2017 at 09:06 PM.
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Old 28-09-2017, 12:12 AM   #42
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Sorry more pictures. This motor and crank spun a shell at about 70 or 80k miles. New shell fitted ran on for another 20k ..but can't remember which one spun .
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Last edited by Chad; 28-09-2017 at 12:34 AM.
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Old 01-10-2017, 06:22 PM   #43
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Imagine of shells. From rod 3 and 4. Definitely more wear to these shells, which coincides with pickup on bearing faces 3 and four, ... Would be interested to hear if this is typical of csl or std m3. Other rod shell don't look to bad, and this coincides with other crank bearing faces being fairly pickup free, ... also noticed most of wear appear to be or the rod shell , bottom shell definitely have less wear in general, ... pictures shows rod 3+4 first. I've definitely seen shell bearings looking a lot worse, so can only imagine once you can see the copper colour on shells there will be a fair amount of pickup on crank faces, pity BMW don't do some kind of temporary shell that can be fitted to polish up crank faces and be then removed......Hopefully of interest to someone
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Last edited by Chad; 01-10-2017 at 06:33 PM.
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Old 11-10-2017, 12:33 PM   #44
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I recently hit 70k miles in mine and as it's no longer my daily I thought it better to have some preventative maintenance with a bottom end rebuild at this service, as I had read about issues with these engines around this mileage. The car has always been regularly serviced and has only done a handful of track days in it's 70,000 miles (almost 50k of those in my care).

The bearings were almost down to the copper! Just a heads up for those still using their cars as they were meant..

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Old 11-10-2017, 05:06 PM   #45
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Originally Posted by niall1 View Post
I recently hit 70k miles in mine and as it's no longer my daily I thought it better to have some preventative maintenance with a bottom end rebuild at this service, as I had read about issues with these engines around this mileage. The car has always been regularly serviced and has only done a handful of track days in it's 70,000 miles (almost 50k of those in my care).

The bearings were almost down to the copper! Just a heads up for those still using their cars as they were meant..

Niall
Pictures of the shells in previous post, are of the second set of shells fitted, they only did 30k maximum. These shells are from the first set including spun shells at about 70k
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Last edited by Chad; 11-10-2017 at 09:20 PM.
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