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DCT oil leak

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Nick9one1
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DCT oil leak

Post by Nick9one1 » Mon Feb 26, 2018 9:45 am

While fitting my decat downpipes I noticed the plastic sump pan on the DCT was wet with oil.

I left the undertrays off the car incase I needed to make any exhaust adjustments, and I've had spots of oil on the drive where the DCT has been leaking.

Seems quite common on other BMW's with a DCT.

Anyone on here had the same?
Last edited by Nick9one1 on Mon Feb 26, 2018 10:47 am, edited 1 time in total.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP :driving:

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Nick9one1
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DCT oil leak

Post by Nick9one1 » Mon Feb 26, 2018 10:47 am

It looks like this is a pretty expensive repair.

There are two gaskets on the DCT that can leak. One on the bottom (oil pan) and one one the side.

The oil pan gasket cant be bought alone, it comes with the pan and is about £200. Oil is £100.

The side gasket requires the DCT to be lowered for access.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP :driving:

Busterboo
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DCT oil leak

Post by Busterboo » Mon Feb 26, 2018 10:50 am

Alloy housing, plastic sump plate. Different rates of expansion and contraction. Plastic distorts. Usually damp, even moist. (Ooh, missus!) Shouldn't drip, though.
Last edited by Busterboo on Mon Feb 26, 2018 3:44 pm, edited 1 time in total.
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Nick9one1
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Location: Newark, Nottinghamshire

DCT oil leak

Post by Nick9one1 » Mon Feb 26, 2018 11:00 am

It looks like the pan has an updated part.

28107842385
replaced by
28108070791

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Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP :driving:

Maniac
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DCT oil leak

Post by Maniac » Mon Feb 26, 2018 3:53 pm

Yet something more to check on mine. I wonder if this might be the source of my shifting issues and coincidence it happened around the same time as the injectors...

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Nick9one1
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DCT oil leak

Post by Nick9one1 » Mon Feb 26, 2018 3:56 pm

Nick9one1 wrote: Mon Feb 26, 2018 9:45 am While fitting my decat downpipes I noticed the plastic sump pan on the DCT was wet with oil.

I left the undertrays off the car incase I needed to make any exhaust adjustments, and I've had spots of oil on the drive where the DCT has been leaking.

Seems quite common on other BMW's with a DCT.

Anyone on here had the same?
I feel your pain. I've only had the car 2 months and I've already replaced 6 injectors and the turbo wastegate valves.
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP :driving:

Punter

DCT oil leak

Post by Punter » Sun Mar 04, 2018 9:49 am

Me too at 53k. BMW warranty didn't cover as gaskets not included. Pity the gasket was part of a £200 bit of plastic!

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Nick9one1
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Location: Newark, Nottinghamshire

DCT oil leak

Post by Nick9one1 » Sun Mar 04, 2018 10:35 am

I discovered that it is possible to buy just the gasket. A company called vaico sells it.

https://rover.ebay.com/rover/0/0/0?mpre ... 1456506337
Z4 35i Space Gray, Red Leather
Stepped Intercooler
De-Cat Downpipes
HKS SSQV
MHD 98RON Stage 2+
395 BHP :driving:

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