11-05-2019, 09:33 AM | #1 |
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'Diff leak'
Had the car in today at the dealer for an oil service and asked them to do an end of warranty check up. Car has 33k km's on the odo. All was well except the diff had a leak. Well leak might be a big word as I have never seen drips on the garage floor and when looking underneath the car, don't see any greasy spots on the diff housing. They booked the car in for 2 days beginning of December. One day to spot where the leak is coming from and order parts, other day to fix. And they told me there was a software update available which they will also do. They arranged a new 330i Touring as a loaner for two days. All within warranty.
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
Join Date: Mar 2013
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 |
The G8X is a disaster. 🤮
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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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