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02-19-2020, 03:16 AM | #67 | |
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When it wears unevenly is when the problems occur. |
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02-19-2020, 09:36 AM | #68 | ||
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Proper hydrodynamic bearings do not wear enough to even consider it wear. Plus, they "wear" evenly. Bad hydrodynamic bearings will spin before the mass difference matters. Pistons will "wear" evenly over time. Unless an injector sticks open... but given the rings are tough, this usually scores the bore, so it will not really affect balance. Rings wear. But unless something is very wrong mechanically, they wear evenly across all holes. Nothing you do the the ECU will affect this. If you bend, deform or wear the crank, your engine is broken. Period. And nothing you do to the ECU can affect that. The rotating assembly in reciprocating engines dates back to the 1800s. They had the balance thing sorted long ago. Nothing about the S65 is special. Other than the fact BMW screwed the pooch on the rod bearing nominal clearance and tolerance. Oh, and rod side clearance is too tight. And it gets terrible gas mileage because it makes you want to drive it hard just to hear it sing. Please convince us otherwise, with some facts. That would be great. Cheers,
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02-24-2020, 01:02 PM | #69 |
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I preferred he didn't so we can keep this thread on topic ..
Thanks for reporting back Richbot, Ngilbe36 & serranot. bmwpower603 Could you not side track this thread with engine issue discussions? Feel free to start your own thread . TIA |
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02-24-2020, 03:21 PM | #70 | |
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Changed mine 30,000KM ago. Have had a few oil reports since and they all looked good. Will be changing oil again soon and will send in another sample (bought a 6 pack) and see what it says. This oil change has been almost 100% city/spirited driving. Some day, I may take a look at them again just to verify all is as expected with proper clearances. Cheers,
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02-26-2020, 02:39 PM | #71 |
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Cool , how long ago (time) did you change them?
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02-26-2020, 03:48 PM | #72 |
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02-26-2020, 05:24 PM | #73 |
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A fair mileage you do then, what have the lead levels been at? Posted your oil reports anywhere?
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02-26-2020, 08:42 PM | #74 | |
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We will see what this next sample gives me. Cheers,
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02-27-2020, 01:11 AM | #75 |
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Good to hear
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03-04-2020, 11:46 AM | #76 |
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BE bearings 25k-ish miles and 120-ish track days. All the bearings look pretty good besides the bearing trashed by the failed main bearing.
Main bearing spun, full engine teardown here: https://www.m3post.com/forums/showthread.php?t=1698983 |
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03-04-2020, 02:55 PM | #77 |
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Interesting & thanks for the pic & link, as you said, bar the ones by the failed mains, the RBs look pretty good .
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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03-04-2020, 05:04 PM | #78 | |
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Somewhere on the planet there is a S65 that has a harder life that mine but it's not common |
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03-05-2020, 02:39 PM | #79 |
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Lol , ex-demo cars!
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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03-08-2020, 11:29 AM | #80 |
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Changed my rod bearings already 3 years ago on 109k km miliage. Now odometer shows 170k km... So Already 60k km I run BE Bearings and ARP bolts. All works perfect with Mobil 1 0-40 all the time.
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03-08-2020, 09:39 PM | #81 |
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thanks for the info. how is the 0w40? do you use mobil 1 0w40? also what sort of climate do you live in? I am getting my bearing done this week and want to know what oil to get.
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03-09-2020, 07:56 AM | #82 | |
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Winter around -5 - -10C Summer around +20 - +25C |
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03-09-2020, 08:34 AM | #83 |
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03-09-2020, 10:35 AM | #84 | |
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Moreover - I run already 60k km... and my engine works good. Why I need use 10-60? I have my humble opinion that 10-60 is need only on track/race mode when the temps are high. So, using like daily city car - 0-40 is good i guess) |
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03-09-2020, 10:50 AM | #85 | |
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03-17-2020, 03:16 PM | #86 |
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BE bearings state that the increased clearances in their bearings is designed with 10w-60 in mind. From there website :-
Designed to address and fix the rod bearing clearance issue. Designed for use with factory 10W60 weight oils. So 5w/50 shouldn't be needed for the rod bearings, RomanK makes an interesting point about the main bearings, but as Helmsman says they are far less likely to fail. Also, 50 grade oil will shear (wear) down to a 40 grade oil (typically) after a few thousand miles or so, not sure that 40 grade will be ok in the long run. Maybe when RomanK has done ~100+k kms on those BE bearings, & if he strips it down then he can show us how they did with 0-40, he's 1 of our guinea pigs (no offence RomanK ).
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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03-18-2020, 11:57 AM | #87 | |
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03-18-2020, 02:04 PM | #88 | |
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Happy motoring!
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