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09-06-2013, 12:57 PM | #155 |
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Just noticed the S85 rod bearing thread was closed. Should have been following along here instead.
Post on M5board, this thread has simliar intent. http://www.m5board.com/vbulletin/e60...re-thread.html |
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09-06-2013, 01:38 PM | #156 | |
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09-06-2013, 03:49 PM | #157 |
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That is an elevated level of lead. Nothing to be concerned with yet. But your mileage isn't that high either. In 20K miles, you will likely be in the same boat as me I bet. Higher lead and starting to show copper from the intermediate layer.
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09-07-2013, 01:50 PM | #158 |
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Are you absolutely sure about this? If you look at the oil analysis thread, there are 2012 cars with lead showing up in their analyses. Some 2008s show no lead. BMW may have changed the bearing part numbers, but may not have changed the bearing material.
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09-07-2013, 02:40 PM | #159 | |
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Last edited by thekurgan; 09-07-2013 at 03:01 PM.. Reason: bad speller |
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09-07-2013, 03:03 PM | #160 |
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Post 119 in this thread. But he does not say they are lead free.
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09-07-2013, 03:50 PM | #161 |
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Thanks, man. Google images had nothing but vendor photos, which can be inaccurate. I'll wait and see how these pan out.
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09-07-2013, 04:39 PM | #162 | ||
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09-07-2013, 07:14 PM | #163 |
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The lead free bearings are as a result of the European Unions directive to remove lead from the auto industry. I can'y confirm the composition of the bearings but it was my understanding as of 2010 lead would not be used on engine bearings going forward.
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09-07-2013, 07:47 PM | #164 |
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Are we looking at the right car here. Just noticed an S54 six cylinder engine in an E90 M3 . Hope this is a typo on Blackstone's part.
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09-07-2013, 07:56 PM | #165 |
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09-07-2013, 09:20 PM | #166 | |
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09-07-2013, 11:32 PM | #167 |
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Today we disassembled an engine in preparation for a bigger project. Engine was 2008 with 30,000 miles. Four or five of the bearings showed excessive wear, and one with small amounts of copper showing around the edges. After disassembling the motor, I measured all of the rod journals, but due to time constraints didn't measure bearings. All I can offer right now is a single measurement on the #1 piston/journal:
Journal: 2.04645 Rod bore: 2.04770 Clearance: 2.04770 - 2.04645 = 0.00125" Bearings: Clevite 088/089's I don't know if or how bearings are supposed to thin with miles (kawasaki00?). After 30k miles, this engine only had 0.00125" clearance on the #1 piston. Ironically, the #1 piston was one of the best looking bearings of the bunch. At some point I think the car owner will want to share the photos, but for now, this is all I can share. By next week, I'm sure I'll get the rest of the measurements as well. |
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09-07-2013, 11:47 PM | #168 |
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Look for excess copper instead.
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09-08-2013, 12:51 AM | #169 |
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Interesting thread, makes me wonder how much of an impact tracking the car will have. Mine now has 25k, I'd better start sending oil samples as a baseline for analysis in the future.
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09-08-2013, 09:26 AM | #170 |
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[QUOTE=regular guy;14630323]
Journal: 2.04645 Rod bore: 2.04770 Clearance: 2.04770 - 2.04645 = 0.00125" Bearings: Clevite 088/089's I don't know if or how bearings are supposed to thin with miles (kawasaki00?) QUOTE] The bearings are not really going to change as they wear, you can see by the clearance that they are virtually the same as when new. When you start to pick up clearance it is usually already starting to hammer the bearing out to the side. Although the bearing is a wear item it does not actually wear as in the more miles it has the more clearance it gains. The bearing never actually touches the crank in normal usage, it rides on oil. In our case with clearance being too tight it is squeezing the oil out and it IS riding on the crank. This does wear it out and increase clearance, but it is also ruining the bearing in the process. I guess it is a two sided answer, normal clearance, no the bearing does not wear.
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09-08-2013, 10:16 AM | #172 |
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Maybe I should have started with this guys I'm from M5board and own a 2006 M5 with 63000Km and my engine failed around 2 months ago I have now received my replacement engine and it should go in in the coming week or so.
I have been reading/searching a lot about the RB issue and I have to say this tread has helped me a lot so Thanks to all of you for sharing so much valuable information. Chris |
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09-08-2013, 08:13 PM | #173 |
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Finally got some time away from work to work on my car and get up on here to post pictures. So got the motor out and the oil pan off. Found a ton of metal in the pan stuck in the oil pick up it is basically everywhere. In the picture the left bearing and cap is number 8. I put the biggest shaving next to the number 7 cap as a joke and then the one to the right is the number 5. The top and bottom shell was completely missing from #7 except for that little piece of the top shell. Looks like I got decently lucky as far as damage to the rest of the motor goes. The crank seems to be beyond fixing wont know until I get it out. But the top end looks good and no scoring in any of the cylinders.
History of car: Maintained solely by BMW from new-96000 miles when I bought it I then started to do 5k oil changes putting 1 to 2 quarts in in between oil changes. Never tracked. the PO was a highway king but I cant confirm that. looking to build this thing back up to last forever. |
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09-08-2013, 10:27 PM | #174 | |
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09-08-2013, 11:04 PM | #175 | |
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2) if increasing clearance solves the problem why didn't bmw start machining the crankshaft for bigger journals clearance for MY '10, '11, '12, '13 ? Is it because it would make them liable for a recall on all early MYs sold ? At least that tells us they expect the cost of all later MYs failure under warranty to cost them less than an official fix in mid production years and recalling all earlier MY's to machine the crankshafts. How far could this be from reality ? |
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09-09-2013, 12:45 AM | #176 | ||
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What we need to find is a permanent aftermarket solution. The E9x ///3s are a brilliant car and we won't get another NA engine in an /// car in our lifetime, so it's all about how we can keep the car and drive it like an /// car and not worry about bearing issues. Ifs and buts have been discussed at length on various thread within this forum and now it's action time. There are some expensive solutions like making the journals smaller but the greater feeling on this forum is not to go down that path. But having said that, engine failure and subsequent replacement or repairs will be a lot more costly, So there is no real answer to your two questions.
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