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05-22-2018, 09:18 AM | #2135 |
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If you have over 100k I would replace the bearings even if the car doesn't have specific rod bearing issues.
It's a 8400rpm engine! |
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05-22-2018, 09:24 AM | #2136 |
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Engines failing with replaced bearings doesn't point at the bearings. How much evidence is there? Was it the mains that actually failed? Who did the job? What are their credentials? What bearings were used? What rod bolts were used? Was their torque wrench calibrated? Was final clearance measured? How was the car maintained afterwards? Too many questions without a qualified autopsy.
I also find something suspicious about one owner going through multiple S65's. Something isn't right in an environment like that. These engine's aren't that fragile. |
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05-22-2018, 09:29 AM | #2137 |
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The replaced bearings had extra clearance .
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05-22-2018, 01:59 PM | #2138 |
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We can't conclude anything without a proper engine teardown.
Still, if the shop messed up the assembly then that would be an even harder thing to find out. |
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05-22-2018, 05:58 PM | #2139 |
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And typically, assembly mistakes would show up sooner than later.
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05-23-2018, 09:49 AM | #2141 |
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05-23-2018, 10:01 AM | #2142 |
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His bearings are replaced in August 2017 . So they had the extra clearance.
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05-23-2018, 10:38 AM | #2143 | |
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But they also offer standard clearance bearings which you have to specifically order, meant for complete rebuilds where the crank is machined or blueprinted spec'ed. The fact that the motor had BE bearings means nothing at this point until there is a tear down and analysis.
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05-23-2018, 11:01 AM | #2144 | |
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How many others were there? 1 Main bearing failure and 1 assembly issue is all I can remember seeing. Hardly any cause to overreact.
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05-23-2018, 11:21 AM | #2145 | |
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On the other hand..6 bearing failures (only on Bimmerpost) in barely 10 days is not overreacting . Meanwhile the Bimmerpost list goes up to number 161...And that's not Worldwide . No worries man . The S65 bearings are bulletproof !
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05-23-2018, 11:50 AM | #2146 | |
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But I think starting to spread fear that aftermarket/replaced bearings are failing is not warranted with the limited number of failures which were not related to the actual bearing themselves so far. You said you noticed replaced bearing failures........there is no sign of that statement being true. Your words again:
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05-23-2018, 12:01 PM | #2147 | |
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05-23-2018, 01:08 PM | #2148 |
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Anecdotal evidence...
You shared no evidence of any motor failing due to the replaced bearings. There have been 2 reported cases on here where a motor failed that had replaced bearings, in both cases the replaced bearings were not the cause of the failure. The most recent case is not yet conclusive, so I don't think you can count that one as yet.
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05-23-2018, 01:26 PM | #2149 | |
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In other words , actually it's for good cause and that's better than stabbing our head in the sand . Worldwide owners are in trouble , or in fear to get in trouble... The S65 and S85 are not cheap .
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05-23-2018, 11:15 PM | #2150 | |
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Thanks for keeping an eye out for more cars to add to the registry. .
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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05-24-2018, 11:45 AM | #2152 |
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05-25-2018, 06:30 AM | #2153 |
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Here is one from Bimmerforums in which a BMW dealer in Florida told the owner it is probably rod bearing related knock. No update at the time of this post so the final word is unknown.
https://www.bimmerforums.com/forum/s...knocking-sound |
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05-27-2018, 10:34 PM | #2154 |
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How the hell do you install a shell backwards? I can't get my head around this for some reason... )( instead of ()? Not trying to be a smartass here. It has been ~18 months since I installed the three sets in my garage so I don't have the details fresh in my head.
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05-28-2018, 12:29 AM | #2155 | |
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I likewise am yet to see any real evidence of the replaced rod bearings having failed. Though this could be a matter of time, we will just have to wait and see. I'd love to know how many out there have replaced their 'replaced' bearings and see what the wear is like. |
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05-28-2018, 09:35 AM | #2156 | |
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That really wouldn't be a problem IMO. The only difference between a top and bottom shell is 5/10000 of an inch thickness. You'd prefer the thicker shell on top because that's where combustion puts all the pressure. If if tops and bottoms were reversed, it wouldn't be the end of the world. |
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