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02-13-2023, 04:41 PM | #244 |
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Hello, I called the BMW dealer today, and they informed me that the dealer does not recommend a transmission fluid change for the vehicle's life. I have a 2011 M3, and the transmission is jolting in traffic. Any recommendations?
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02-13-2023, 04:57 PM | #245 |
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Respond. “Oh that’s nice. I’d like to schedule a transmission fluid change”.
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02-18-2023, 07:56 AM | #246 | |
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What he said.
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Up to the e36s they used to recommend oil changes every 60k (something I carried over to my e46s and e90s). I believe post e90s they re-introduced trans oil changes, albeit at 100k miles. Hmm, now I'm a BMW tech myself I can find out if that's right! lol [edit] Haven't yet found any evidence of 100k trans oil changes by BMW! Only seen mention of lifetime oils If the DCTs sump pan gasket hasn't been changed already, it'll probably need it by now anyway. I can't remember if they have a filter, but assuming they do, change that 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. Last edited by Assimilator1; 04-16-2023 at 07:29 AM.. |
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02-18-2023, 10:34 AM | #247 |
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Pressure filter, suction filter, and a suction jet pump all should be periodically changed as deansbimmer has pointed out in a different thread. I wouldn’t trust any SA that told me otherwise. Especially for a car with over 100k miles on the odo
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02-19-2023, 11:21 AM | #248 |
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Gotta link to that thread?
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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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02-19-2023, 01:20 PM | #249 |
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02-20-2023, 08:35 PM | #250 |
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Get a battery tender.
Efficient dynamics. Aka, the alternator has a clutch and decouples to reduce engine drag when not needed. So the battery runs the car most of the time and the alt. reconnects when the battery charge is low. Make sure a used M3 has the correct battery type. Mine did not and it eventually killed the alternator over time. It basicaly ran the alt. to death. New alt. was $1600 installed + battery.
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02-22-2023, 05:10 AM | #251 | |
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Where did you read that it has a clutch?
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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; 02-24-2023 at 12:45 PM.. |
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02-22-2023, 03:20 PM | #252 |
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Sorry, not a clutch, a de-coupler pulley.
I’ll have to find it. It came from an M3 technical document designed for SAs and technicians. Also had a discussion w/ the M-certified texhnician who fixed my E90 about this very subject.
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02-24-2023, 12:48 PM | #253 |
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Ok, interesting, but I didn't think it had any sort of mechanical decoupling device, but I could stand to be corrected .
Or I could just look it up on BMW's AIR tomorrow morning (I started working their just last month).
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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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02-26-2023, 09:18 AM | #255 |
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I just need to remember to bring my M3s VIN with me, and remember to do it! lol
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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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02-27-2023, 06:33 PM | #256 |
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Eyes wide shut.. How much does it cost to fix up a neglected E92 M3 that was purchased for ‘only’ $11K? And what type of repairs does it need?
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Last edited by DrFerry; 02-28-2023 at 07:57 AM.. |
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02-28-2023, 02:12 PM | #257 | |
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Yep, no such thing as a bargain car!
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If someone knows where I can find more precise info, then by all means LMK!
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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; 03-11-2023 at 07:49 AM.. |
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03-04-2023, 10:26 AM | #258 |
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I did the complete flush with the pan at 63 k. The high pressure filter was black. Do not listen to anyone that uses the words “lifetime fill” and your car in the same sentence.
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03-08-2023, 06:31 PM | #259 | |
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03-11-2023, 07:58 AM | #260 |
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Yea would be good to know for 100% sure, but as far as I'm concerned it's 99.5% certain they are electrically switched. Never seen an electro-mechanical clutch on an alternator on a car in the 28 yrs I've been a car tech (they are widespread on AC compressors though).
Also when I changed the belts and pulleys on my M3, I'm fairly sure I looked closely at the alternator pulley for this very discussion back then, and IIRC it was just a plain simple, solid pulley. I believe the idea of an alt. clutch comes from the mis-reading of turning the alt on/off, some people assume it's done mechanically. However if someone has solid proof to support that, I'm all ears..... err eyes!
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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. |
04-16-2023, 08:06 AM | #261 | |
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Turns out that BMW's S-Gate (which I did know of) has a Wikipedia like section called Technipedia (which I didn't know of), within this (amongst much other info! It's very interesting for a BMW geek like me! ) is a section for the Alternator in Drivetrain>Engine electrical system>Alternator>Intelligent Generator Control (IGR). It starts by saying this was introduced 'Since about 2004', and 'In marketing, IGR is often also designated as "brake energy regeneration".' (which is the term we know for our M3s). In this it describes switching off the alternator to save fuel and allow more of the engine's power to go to the wheels (when the battery has enough charge). If the battery is at a high state of charge the alternator only charges on the over run/braking (something I've only ever seen on my long trip to the Nurburgring (I'm in SE England). I have a meter on the dash displaying volts, as well as ECT. When cruising/accelerating it was showing battery voltage of 12.3-12.6v ish, AFAIR). If the battery charge is middling it'll only provide enough power for electrical consumers when cruising/accelerating and won't charge the battery (quite how it would stop any charge going to the battery it doesn't say, and personally I would make an educated guess that it doesn't. But that the charge rate is minimal. Voltages I see at this level are about 13-14v, ish ). On the over run/braking it still charges at full capacity. If the battery charge is low enough* the alternator will charge full time at full capacity, just like old fashioned charging systems. (I typically see in between 14-15v here). *Annoyingly the techipedia doesn't say at what thresholds these different charging strategies are deployed! Their is no mention of an alternator clutch, it talks about switching on/off the alternator (an ambiguous term), but more clearly it also mentions activating or energising the alternator, which to me is a clear reference to electrically switching it on.
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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; 04-16-2023 at 08:18 AM.. |
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04-17-2023, 07:51 PM | #262 | |
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04-18-2023, 01:46 PM | #263 |
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Just read through this entire thread. Maybe something that would be helpful is for the folks looking at an 08, what are the differences to look for. I’ve read the clutch and flywheel and that it would be upgraded to the newer >=09 spec. No I drive. Older taillights. Generally speaking, if you buy a car without NAV (single hump) what are you giving up? Do you lose access to driver adjustments that can be made? Or do you just have to get used to making changes via an ODBII tuner? Lots of folks with 08’s so I’m less concerned about buying an 08 if I found the right one, but always good to go in to a purchase armed with as much info as possible. I read the 09-13 sticky, but was less helpful, and the 08 was oddly missing from the list.
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