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02-03-2017, 01:10 PM | #309 |
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Very low km 15k miles 2010 e92 MDCT with orignal bearing
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02-03-2017, 02:50 PM | #310 |
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74k miles original bearings. Blackstone results come back fantastic and are well below the average in most areas. However, after supercharging my car I'm getting my bearings replaced this month. I'll post results of the bearings as my tests have shown no sign of anything to worry about.
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02-03-2017, 09:46 PM | #311 |
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154k miles, 45 track days, original bearings. 2011 M3.
Probably will do rod bearings this year.
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02-07-2017, 01:23 AM | #312 | |
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03-12-2017, 10:33 PM | #315 |
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Why w so low miles? Unless you plan for SC seems very premature.
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03-13-2017, 08:54 PM | #316 | |
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As for SC, I've been thinking about a Harrop, but it may never happen. |
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03-13-2017, 09:11 PM | #317 | |
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A interval of 50-75k seems more reasonable with oil analysis monitoring between or sooner if planning a SC or racing the car a lot. Either way goodluck... it certainly wont hurt the car if installed correctly.
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03-13-2017, 09:57 PM | #318 | |
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I have one of the early 2008s, original owner. 40K miles and am not sure when I should do it. I don't have any plans to sell it... I just love that German V8 but certainly can't afford a new engine. |
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03-13-2017, 10:46 PM | #319 | |
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03-13-2017, 11:39 PM | #320 | |
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2008 dct coupe, evolve engine/dct tune, ttp, ms intake, megan exhaust, cf ds. Sold. Last edited by Doc Oc; 03-13-2017 at 11:44 PM.. |
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03-13-2017, 11:44 PM | #321 | |
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Also, I was very careful to break it in per specs and did an initial oil change at 1k and then every 5k or so. Hopefully will last a long time! |
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03-14-2017, 12:48 AM | #322 |
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Sept '07 build. 73k km. Last BL analysis not great. High lead after a prolonged spell with the oil. I am nearing my next oil change and it will be interesting to see the BL analysis.
The interesting part is that with my previous oil changes, I had to top up 1L every 3km religiously. I am currently 8k km into the change and there is no warning to top up. The driving style hasn't changed. I wonder with the increased lead level in the last change - a case of RB wear, whether the RB clearance has opened resulting in reduced oil consumption? If that's the case then, with the oil feeding thru as designed I should not see anymore wear right? This is my theory and happy for a wider discussion!
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03-14-2017, 08:44 PM | #323 |
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There is not much correlation between oil use and bearing wear. Only two ways to lose oil, via leak or by burning it. It only burns when it gets into the combustion chamber. Clearance affects oil pressure and flow but that's about it...
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03-14-2017, 09:30 PM | #324 | |
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03-14-2017, 09:37 PM | #325 |
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2008 E90 with 143k, 77k of which are miles that I put on the car, mostly highway miles. Not sure if I need to start going car hypochondriac on the situation???
I guess I'll send used oil from the upcoming used oil to Blackstone and a sample of the fresh oil about 3k into use and see what they say?
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03-15-2017, 08:10 PM | #327 |
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I do the change myself and there has been no change to the oil used Castrol 10w-60 and it's either retail or TWS. Regardless of the retail or TWS, I have topped up every 3k km from the time I bought the car new. This is what's puzzling me now.
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03-16-2017, 08:08 AM | #328 |
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08 E92 M3 147k. Blackstone analysis looks like shit. 3 1/2 times the limit on Lead and 2x limit on copper.
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03-16-2017, 01:02 PM | #329 |
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If we could all be assured rod bearings were a 100-150k mile maintenance item, I would feel much better. But there are too many reports of failures with much, much lower miles that there is no certainty about anything.
The best certainty that I see is the overall statistics -- probably less than 1% of the 57,000 cars have had failures so far. Maybe 3% have had preventative maintenance rod bearing changes, and the majority of those bearings have looked well worn. Those are pretty good odds if you are a betting person. I am not, and changed my bearings at 60k and 6 years when my extended warranty expired. I have absolutely no worries now, but will change them again by 120k. |
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03-16-2017, 01:32 PM | #330 | ||
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Thanks |
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