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04-02-2020, 09:01 AM | #1057 | |
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I've also been wondering if this explains the slight Al bump in my second UOA that went away in subsequent analyses (i.e. that was from the new 702/703 bearings getting that initial smear). |
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04-02-2020, 09:10 AM | #1058 | |
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The first analysis after internal engine work (or a new engine) is basically a throw-away. Even the second one is only of marginal use to simply validate that most of those break-in contaminants have been removed by changing the oil & filter. The whole point of a UOA is to establish a baseline and then monitor deviations from that. Here's just an example. It's not an S65, it's a Chevy LT1 (Corvette/Camaro/truck motor). Same concepts apply though.
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04-02-2020, 12:56 PM | #1059 |
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Yea, but if the very 1st & 2nd oil change shows very high lead levels that would show a little support to the early wear idea (your Chevy's 1st oil report doesn't, it's surprisingly low! ).
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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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04-03-2020, 10:04 AM | #1060 | |
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Maybe, but my interest would be more around what level it stabilizes to by the 3rd or even 4th oil change...or even how long it takes to stabilize. UOA isn't the end-all, be-all of engine health. Even Blackstone and Terry Dyson will tell you that.
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04-03-2020, 12:32 PM | #1061 |
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Yea I know that, I take it you didn't notice the link in my sig then?
I'm more interested in the 1st couple of oil changes
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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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07-07-2020, 07:06 PM | #1062 |
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Just got the oil report back for my 160,000km (100,000 miles) '08. The oil had 10,000 miles on it. Very high Lead and Copper. I use regular 94 octane gas.
It looks like I'm overdue for new bearings..... |
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07-07-2020, 07:20 PM | #1063 |
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07-13-2020, 06:12 PM | #1064 |
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Just got oil analysis back for my new-to-me 2008 M3. AFAIK, these are original bearings. Given the engine has 120k miles on it, an oil analysis is the first thing I did. Lead looks especially high and Silicon reads high as well. Only put ~600 miles on the car before oil analysis, only 93 octane and PO did not track car so no leaded fuel likely on this oil. Looks like I may start looking for a reputable shop to replace bearings... Thoughts?
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07-13-2020, 06:34 PM | #1065 | |
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Also, have the intake and vacuum system checked for leaks, and make sure there’s a decent air filter in there. |
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08-06-2020, 12:34 PM | #1066 |
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Yea, I hope both you guys have done your bearings by now?
That pb level is likely trouble!
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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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08-31-2020, 08:02 AM | #1067 |
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Previous report here. Now at 110107 miles on the engine. 4931 miles on the oil in this sample.
Consumption has jumped to ~1 L / 1500 mi, which is roughly where it was when I bought the car with leaking valve cover gaskets. I fixed those (which cut consumption in half) and haven't noticed other leaks, though I have noticed what look like traces of oil on some of my spark plugs (pic attached). Wouldn't mind some feedback on that. I replaced the oil separators preventatively when I changed the oil. Was going to do the PCV valve as well but chickened out. Had a BMW crankcase pressure test done recently and was right in the middle of the normal range, though that was only at idle. Fuel dilution was originally reported at 2.1%. Seemed high, so I asked them to re-run that test to verify. New number is 1.6%. Hoping that's the real one. Wear Metals Iron -7 Chromium - 0 Nickel - 0 Aluminum - 3 Copper - 2 Lead - 0 Tin - 1 Cadmium - 0 Silver - 0 Vanadium - 0 Particle Quantifier (PQ) Index - 12 Contaminant Metals Silicon - 7 Sodium - 4 Potassium - 1 Multi-Source Metals Titanium - 0 Molybdenum - 52 Antimony - 1 Manganese - 0 Lithium - 0 Boron - 53 Additive Metals Magnesium - 23 Calcium - 2458 Barium - 0 Phosphorus - 824 Zinc - 935 Other Contaminants Fuel Dilution - 1.6% (GC) Soot - <0.1% by vol. Water - <0.1% by vol. (FTIR) Fluid Properties Viscosity @ 100º C - 18.3 cSt TBN - 4.44 Oxidation - 12 Nitration - 11 |
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09-03-2020, 01:54 PM | #1068 |
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Follow-up report after 937 miles.
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09-14-2020, 04:27 AM | #1069 |
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09-15-2020, 12:41 AM | #1070 |
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Here's my first Blackstone Report.
2008 with just over 60,000 miles now. Original rod bearings. The car was parked for 4 years before I bought it in August of 2018, but didn't get it drivable until the following November. Bought it from a friend who is the original owner. It had just over 42,000 miles when I bought it. Original owner never tracked, always warmed up, but not babied. Has had a G-Power blower since the 6000 mile mark, so that's 54,000 miles with the blower. The car was well maintained and was on a yearly oil change schedule at the local BMW dealership. When I bought it, I switched it from the oil (TWS 10w60) that the dealership was using, to LiquiMoly 10w60 on a recommendation from a local BMW specialty shop. I change the oil myself at 5000ish miles, but more often if there are track days involved. I always let the idle calm down after starting it, usually sit in the driveway for a few minutes, never over 3000rpm until fully warm, always drive in M mode (Power/EDC comfort/DSC off). California car, so 91 octane Chevron, sometimes Shell.
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Chris, 2008 E92 Last edited by Davisca455; 09-15-2020 at 09:49 AM.. |
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09-27-2020, 12:55 PM | #1071 | |
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For a non turbo engine, and unless it's just been tracked, or hard road driven, I've never seen the point of a cool down period. Seems unnecessary, please enlighten me.
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Plug tips look good to me, brownish colour, although the photo is a little distant.
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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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10-02-2020, 06:29 AM | #1072 |
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Hi, I got my oil report showing increasing copper in ppm every test. Rod bearings was replaced with BE bearings and OEM bolts at 70,000 mileage on motor and now is 106,000. Just only 35,000 on BE Bearings. I hope to get some thoughts from expert here. To my understanding, that BE Bearings are made by multiple layers, Clevite TriArmor Coating (outer), Babbitt Alloy (center) and the last layer Lead-Copper Alloy. Is it showing the rod bearings already worn to copper layer and should I worry about it? What other parts in the motor would cause this increasing copper? Any inputs and advice will be much appreciated. Thanks in advance.
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10-03-2020, 12:19 PM | #1073 |
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It would have to wear through the lead layer 1st to get to the copper in the rod bearings. [edit] Unless the lead had been worn through prior to the oil reports.
Your lead readings are zero so it can't be from them. Not sure where the copper is coming from really, maybe a bronze bush(es) wearing somewhere? Can't think off hand what would have them.... Ask them where they think it could come from.
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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. Last edited by Assimilator1; 04-21-2021 at 12:20 PM.. |
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10-10-2020, 12:00 AM | #1074 | |
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10-24-2020, 03:33 PM | #1075 |
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Thoughts? Aluminum/Tin bearings. 1000km, all track usage, from the latest sample. Car is only track driven. ~45k KM on the motor.
Blackstone suggested to continue oil sample intervals of 1000km to track potential bearing wear. As it stands now I think the bearings are holding up good based on the report and how the samples have been trending. Opinions?? |
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11-02-2020, 04:17 PM | #1077 |
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First report on my JB '11 M3 DCT. I wonder where this stupid copper is coming from..
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12-12-2020, 10:00 AM | #1078 |
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106,500 miles report (BE bearings after 6,500 miles)
Nothing interesting to report which is exactly what I was hoping for. No lead or copper.
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