11-05-2019, 09:33 AM | #1 |
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'Diff leak'
Featured on BIMMERPOST.com Just wondering where the leak might come from? Anyway always good to do an end of warranty check up
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11-25-2019, 09:31 AM | #2 |
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Drives: 2017 BMW M3
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Location: Sherwood, OR
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What did you ever find out about this? Were they able to find and fix the leak?
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2017 M3 - Long Beach Blue, Competition Package, Burger Performance Intake
2009 135i - Dinan CAI, Dinan Exhaust, Turbonetics FMIC, Dinan Stage 2 |
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11-27-2019, 03:18 PM | #3 |
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If its like all M's before us, its the output shaft seals.
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11-29-2019, 11:10 AM | #4 |
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Probably correct. Porsche routed the exhaust pipes on the older Boxsters under the rear axle inner CV boots just like BMW did on our F8Xs, and I suspect the heat is deteriorating the seals. On the Porsches it would dry out and split the inner CV boots. On my stock exhaust there is a secondary plate welded on the exhaust pipe adjacent to the inner boots, so perhaps that's BMW's attempt at a heat shield.
I ordered some header tape and will be wrapping my exhaust where it runs past the diff. Perhaps this will buy me some time on the seals. |
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11-29-2019, 01:30 PM | #5 | |
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Quote:
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11-29-2019, 03:53 PM | #6 |
The G8X is a disaster. 🤮
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12-01-2019, 12:26 PM | #7 |
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Car is going in tomorrow and should have it back tuesday. Will post the outcome. It is a very small leak as I have never seen any oil on the floor and not even on the diff housing.
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12-04-2019, 12:47 PM | #8 |
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Picked the car up today, as they've had to order special tools yesterday. Was told the seals for both the output shafts and for the pro-shaft were replaced. Had a 430i GranCoupe and an X2 M35i as loaners.
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12-05-2019, 06:34 AM | #9 |
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Just had a quick look underneath the car, but it seems as if they've replaced one of the bushings in the subframe as well. At least it looks new
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