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03-28-2014, 03:22 PM | #265 |
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My bearings after 21,358 miles. 7500 oil change intervals, and the last oil change before bearing change was done at 5000 miles. Break in procedure was followed, a few minute warm ups before drive off then driven under 3k RPMs until warmed up. On the bright side, even wear!
replaced with WPC treated bearings. |
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03-28-2014, 06:10 PM | #266 |
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Wow, your bottom shells look worse than most that we have seen, considering the mileage anyway.
Do you plan to pull the WPC bearings ever to look at them? |
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03-28-2014, 06:12 PM | #267 |
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REDBULL, you had a 2010 M3 that ALSO had rod bearing issues? oh man! And your 2012 is also pretty bad. Yikes
Also, has anyone checked on their WPC treated bearings to see how they are doing after 10k+miles? |
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03-28-2014, 06:19 PM | #268 |
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Not sure if anyone would do it all over again so soon, unless oil analysis reports indicated a problem was present.
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03-28-2014, 10:54 PM | #269 |
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I'll offer a prediction. For the same car at the same mileage, with or without a SC added, using the same oil change regimen, the bearing wear during the second round with these treated bearings will be insignificantly different or worse. Why, there isn't really a substantial change to the bearings.
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03-28-2014, 11:52 PM | #270 | |
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I just think rod bearings need to be monitored and eventually changed on the M3 if you plan to keep it long term. my previous one was used, so i can't speak to how that one was maintained. |
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03-28-2014, 11:54 PM | #271 | |
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03-29-2014, 09:35 PM | #272 | |
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The next obvious question, if the process really can harden such a surface, is harder better? Harder is probably universally better on journals, but bearings?? A great deal goes into trying to answer that question but the general answer is not always. Personally this appears to be somewhat gimmicky and there is likely little data for it benefits on bearings and surely there is zero data for the particular wear issues if and when accelerated in the S65. When someone pulls apart their bottom end after an equivalent use of these and we can get a fair apples to apples comparison I'll more than readily change my mind. Until then....
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03-30-2014, 11:09 AM | #274 | |
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03-30-2014, 11:14 AM | #275 | |
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03-30-2014, 11:16 AM | #276 | |
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03-30-2014, 11:32 AM | #277 |
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Good choice on the bearings over the coated ones. I look at rod and main bearings about every other day. That stuff pops right out. If you took a wrist pin and rolled it across the bearing surface you can feel the bump bump bump across the face of the bearing. Should have never been in the motor to start with.
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03-30-2014, 10:44 PM | #279 | |
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Absolutely. Damage should be to throw away parts well over damage to something like the crankshaft.
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Either way, without data, seems pretty gimmicky to me.
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03-30-2014, 10:44 PM | #280 | |
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check out the About section on their site. Good info and detailed breakdown about the treatment. |
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03-31-2014, 12:27 AM | #281 |
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I read that, their own info says it makes the surface harder. The question is: if you accept that contact is inevitable on an S65, would you run the risk of damaging your crank instead of just wearing your bearings? I doubt it but I am curious.
Their info shows the surface treatment enhances oil retention and lowers friction, so it may be quite helpful. Unrelated question: what metals should we be looking for as wear indicators in a lead free bearing? |
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03-31-2014, 11:03 AM | #283 |
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If I were supercharging I'd definitely pull them, but that's me. Total failure doesn't seem to be that common but no one has pulled a really nice looking set even out of stock motors.
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04-01-2014, 09:36 AM | #284 | |
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04-01-2014, 11:56 AM | #286 | |
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Not sure if anyone would pull bearings again so soon, unless oil analysis reports indicated a problem was present.
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