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12-17-2022, 11:23 AM | #2708 | |
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01-08-2023, 10:29 AM | #2709 |
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I just changed out the bearings on my ~49K mile 2008. It looks like the uppers have taken a beating. Lot of copper showing on the outer edges as well.
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01-08-2023, 03:26 PM | #2710 |
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I have 52k miles on my 11 E90 ZCP. Debating if I should get mine done now, or wait another 10k or so.
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01-08-2023, 03:43 PM | #2711 |
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Definitely worth changing them, though they’re not too bad IMO. Good move to replace them. Well done. What type (brand) of rod bearings and rod bolts did you replace them with?
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Last edited by DrFerry; 01-08-2023 at 06:04 PM.. |
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01-08-2023, 05:51 PM | #2712 |
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I went with BE Bearings with ARP Bolts. I am installing a Harrop kit so i wanted to be sure that the bearings were in top shape.
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01-08-2023, 06:09 PM | #2713 | |
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Links to m3post Harrop threads: Official Harrop thread: https://www.m3post.com/forums/showthread.php?t=1070943 Harrop Owners Chime in (aka the unofficial thread): https://www.m3post.com/forums/showthread.php?t=1802212
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01-08-2023, 09:15 PM | #2714 | |
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Are the upper ones supposed to be strictly used combined with the correspondently placed lower ones? Like I drawed the arrows in the picture? Or opposed? Green-Eggs |
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01-09-2023, 01:29 PM | #2717 |
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All BE Bearings are measured, sorted, and binned before creating matched sets. That means all of the uppers are the same thickness as each other, and all of the lowers are the same thickness as each other. At that point, order within uppers/lowers doesn't matter.
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01-09-2023, 02:01 PM | #2718 |
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Pretty decent IMO for that kind of mileage (99K). I've seen a lot worse at 2/3rds your stated mileage. Very good move to replace them finally.
Questions: 1) What year is your car? 2) What numbers are stamped on the backside of the shells you took out? 3) What type (brand) of replacement rod bearings and rod bolts did you go with?
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01-09-2023, 04:30 PM | #2719 | |
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2. Didn’t catch them when I was at the shop 3. VAC bearings and ARP hardware My tech noted that they could have been replaced early on, but again I have no record of them ever being done. They appeared to the the revised OEM ones
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01-09-2023, 04:56 PM | #2720 |
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They look like the original leaded bearings to me. Note the splotchy appearance of the top shells. The newer lead-free OE bearings get a yellow-ish discoloration (looks like wear down to the copper but isn't) but they don't usually get splotchy like that.
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01-10-2023, 10:42 AM | #2721 | |
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01-10-2023, 02:39 PM | #2722 |
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Ditto
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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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01-10-2023, 03:10 PM | #2723 |
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Unfortunately, bad news for this S65. Spun bearing on #1.
2008 M3, 6MT @ 170,250mi
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01-10-2023, 04:13 PM | #2724 | |
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01-10-2023, 05:20 PM | #2725 |
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Block is fine, car runs good, plenty of power. Wouldn't have even suspected a thing until the pan was pulled.
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DrFerry6748.00 Davisca4552219.50 |
01-11-2023, 01:55 PM | #2727 |
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Also interested to know, and how was the crank?
Is the big end cap scrap? Or can it be polished??
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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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