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01-12-2023, 01:32 PM | #2729 |
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Surprisingly, no rod knock at all. Best option was to install new bearings and ride the engine out until the inevitable happens, but gives us time to source a replacement.
Crank journal is pretty badly damaged, doubt it can be saved.
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Assimilator1588.50 DrFerry6725.50 |
01-17-2023, 02:13 PM | #2730 |
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Is that road toasted too?
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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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01-19-2023, 11:23 PM | #2731 |
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The Seattle area can get down into the teens (F) occasionally, 20s often, but we don't spend many days below 32 and I doubt it saw more than a handful of snow days.
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01-25-2023, 01:57 PM | #2733 |
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Fancy conducting a little experiment on 1-2 of your worst of your old shells?
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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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01-25-2023, 06:01 PM | #2734 | |
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01-26-2023, 01:25 AM | #2735 |
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2008 with ~78k miles, original bearings
Last edited by TheStevo1000; 01-28-2023 at 12:35 AM.. |
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01-26-2023, 02:23 AM | #2736 |
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My car had been through a lot of owners even though it is relatively low mileage. It has a full none dealer history and is in really good condition but I had no idea how sympathetic its previous owners had been when the engine was cold.
So this swap was purely precautionary, the bearings themselves were actually ok and had a load of life left in them but at least now I have piece of mind, and with the mileage I do in the car each year they shouldn't need to be touched for another 100 years or so |
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DrFerry6725.50 Assimilator1588.50 |
01-26-2023, 11:29 AM | #2737 |
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Photo not loading? Bad image link.
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01-26-2023, 12:59 PM | #2738 |
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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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01-28-2023, 07:32 AM | #2741 |
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Believe it or not, they look a little better than I would’ve expected for 78K miles. They’re just about to break through to the copper layer. Great job replacing them and now having some peace of mind. What brand of bearings and rod bolts did you replace them with?
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01-28-2023, 08:14 AM | #2742 |
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Yea not bad for an S65. Mine were much worse!
75k miles, 2 had purple (heat) streaks, of which one you can see. Changed 2-2021. More info and pics here.
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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. |
01-29-2023, 11:24 PM | #2743 | |
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01-30-2023, 07:08 AM | #2744 | |
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01-30-2023, 08:10 AM | #2745 | |
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01-30-2023, 11:21 AM | #2746 |
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Garage List 2004 e46 M3 Convert ... [7.50]
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Bearing change at 15600 kilometers
These just came off of a new to me e93M3 produced in Aug 2008.
Three oil changes since new break in service at 1100 klms, next oil change at 10200 klms in 2017 and third last in 2021 at 15000 klms. Upper obviously the right one in each pic. |
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01-30-2023, 12:26 PM | #2747 |
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So in a little over 9000+ miles, rod bearing wear is already significant - albeit taken place over the last 14+ years. Cold starts with 10W60 and tight factory clearences are possibly one of the main mechanisms for premature rod bearing wear. When my car was a few years old I once parked it for a week in an outside airport parking lot. That week ambient temperatures sank into the 20F region in upstate South Carolina. When I returned from my business trip, I heard S65 bearing knock for the first time. I never did that again and after that always bumped the starter a few times in an effort to build some oil pressure before cold weather starts. I changed those bearings at 115K miles by employing some other tactics too. Where has your new to you car spent most of its life so far?
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01-30-2023, 01:21 PM | #2748 |
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Garage List 2004 e46 M3 Convert ... [7.50]
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On a Greek island, covering very short distances at a time, temperate to hot climate though depending on season.
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01-30-2023, 01:58 PM | #2749 |
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So lots of start and stop without much time to warm the engine up. About ~9000 miles in 14+ years is about 680 miles per year or 1.7 miles per day.. The engine internals look great and very clean. Thanks for the photos. Enjoy Greek life.
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01-30-2023, 03:23 PM | #2750 | |
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But yea I think I did do them just in time, I suspect the next stage for those purple streaked ones would have been the copper breaking up! Never been a gambling man ironically .
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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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