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09-13-2022, 12:59 AM | #23 | |
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09-28-2022, 10:58 AM | #26 |
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After several month without the friggin code...it turned up again. No code on the replaced aux water pump, cooling system seem to be running fine. This is a tricky one...
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09-28-2022, 08:13 PM | #27 |
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Drives: 2009 E92 M3 Dakar Yellow II
Join Date: Oct 2021
Location: Edmonds, WA
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Do you recall the conditions and any notable behaviors when the warning popped up? I went on a pretty hard 8 hour total drive in 90f weather a while back and didn't have any issues besides the persistent o-ring weep that I've been tracking since February. I do have that recurring aux water pump code but it doesn't trigger any lights.
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09-29-2022, 04:27 AM | #28 | |
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similar to others really i.e. typically at low speed (where I assumed water pump/coolant should help compensate for lack of air cooling). Did a 200 mile round trip/high way during the weekend without issues. Missed your mentioned o-ring leakage, what sealing is this? |
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09-29-2022, 08:06 AM | #29 |
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Drives: 2009 E92 M3 Dakar Yellow II
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The o-ring sandwiched between the thermostat and the transmission body. Probably gone flat over time. I doubt it was swapped out at the last full transmission service at 88k miles.
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09-29-2022, 09:37 AM | #30 |
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Ah, got it. Had my Tstat replaced together with fluid and filters some year ago, and yes believe I had some weep there as well. Wouldn't worry if tiny.
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04-19-2024, 11:33 AM | #32 |
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have you considered it might be the oil pump in the dct?
there's a plastic unit in there that could be causing issues. i think deansbimmer refereed to it as a anti-return check valve and a venturi pump or sucking jet pump? what a name.. lol anyways it could be a factor. maybe you might just need a full service on the DCT with all the soft seals and inspection.. p/n: 28107842849
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04-19-2024, 12:59 PM | #33 | |
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04-22-2024, 09:26 PM | #34 |
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Have you replaced the PN: 28107842838?
I was having some downshifting issues and the transmission was not smooth at all even after a full DCT service + upgraded pan. Then I replaced this part @ 60k miles and the transmission was shifting normally again just like it was when I got it at 30k miles. I took a look at the ball inside of the jet suck pump and it was very much pitted and looked like it was getting old as the plastic had completely discolored.
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04-23-2024, 02:46 AM | #35 | |
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Checking clutch pressure, control valves etc (Protool) it seems to align nicely with the spec's (also provided by the box/read by Protool). |
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