535xi Oil Cooler Gasket replacement - Bimmerfest - BMW Forums

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5 Series DIY
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Old 06-09-2012, 11:45 AM
landsharklager landsharklager is offline
Location: MO
Join Date: Aug 2011
Posts: 24
Mein Auto: 535xi
535xi Oil Cooler Gasket replacement

Posted in the regular DIY forum for the 1s and 3s.

Maybe this will help someone out. Fix is cheap and easy. $16 for a new gasket. Maybe an hour worth of work.

Had a leak on my oil cooler on my 08 535xi and it was getting annoying. Finally after another issue with an oil leak (another story, my own fault), I decided to fix this one.

Parts Needed:
#11427525335 (Oil Cooler to oil filter housing gasket, my dealer charged me $18 with tax)

Tools needed:
6mm allen wrench
Torx T27
Inverted Torx socket. (I used a 3/8" any socket)
3/8" drive ratchet for Sockets

Optional, but recommended:
Intake Cleaner
Shop Rags

Remove the Radiator Support cover using the T27, set it to the side. No need to disconnect the hood latches. (10 bolts)

Using 6mm Allen wrench, remove bolt holding the bracket for the oil return and supply lines to the cooler housing. This is the most difficult bolt to remove, as with the fan still in it is difficult to get the allen wrench to turn correctly.

Now using the inverted Torx, remove the 3 bolts holding the housing on. the 3rd is in the center of the housing on the bottom, this is the reason we removed cooler lines previously.

Remove the housing and look for any mars or reasons it may not seal, good time to clean the housing as well.

Remove the old rubber gasket. Use a hook, awle, or knife to get the old gasket out.
Replace with new gasket. DO NOT USE RTV SILICONE

Reverse the order to install everything back.

Tighten it all down, then turn your engine on and check for leaks. I use thread locker on all my bolts, this is a personal preference though.
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Old 05-06-2014, 08:26 PM
sandeep_1983 sandeep_1983 is offline
Registered User
Location: Minneapolis
Join Date: Jan 2014
Posts: 70
Mein Auto: 525i
Very Helpful

Thanks for this step by step guide.. I am probably gonna do it myself.

Can you tell me what problems you had with the oil cooler gasket? I am having some oil droplets in my coolant and I am guessing its the oil cooler gasket.
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Old 05-27-2014, 02:23 PM
sebi sebi is offline
Registered User
Join Date: May 2014
Posts: 1
Mein Auto:
Thanks a lot, I just did mine, very helpful.

Sent from BimmerApp mobile app
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Old 10-24-2014, 11:53 AM
MadToy MadToy is offline
Registered User
Location: North Carolina
Join Date: Oct 2014
Posts: 1
Mein Auto: 335i
Thanks. Just found this, and I think I need to do this on my 335. I'm hoping this is the gasket I need to replace, and not the housing gasket. I have a small puddle of oil sitting right behind the cooler, in the little pool next to the filter cap. The only way I can see oil getting there is from this gasket.
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Old 06-23-2015, 04:59 AM
5series07 5series07 is offline
Registered User
Location: NJ
Join Date: Mar 2015
Posts: 12
Mein Auto: 525xi
I have an oil cooler gasket leak. It has been leaking for a while and coolant needs full replacement daily. Is this expensive to repair?
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Old 06-24-2015, 05:38 AM
Boland01 Boland01 is offline
Location: Magnolia, TX
Join Date: Aug 2013
Posts: 153
Mein Auto: 2010 535iX, 335i, 328i
Looks like a simple job. Thanks, I'm sure this DIY will come in handy in the future.
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Old 07-23-2015, 03:17 PM
5Dirty5's Avatar
5Dirty5 5Dirty5 is offline
Location: HighDesert
Join Date: Feb 2015
Posts: 137
Mein Auto: 2008 535I Sport
Great write up. I bought my gasket already. Going to be doing this on my 2008 535I

2008 535I Sport JB4+DCI+Muffler Delete
2007 Jeep Commander Limited HEMI
1996 Integra DB8 Stroked 1.9L 750WHP Turbo E85 Fuel 34PSI
1996 Chevy Silverado 4x4 6" lift 35" tires
1950 Chevy 3100 Truck S10 Chassis Swap (under construction)
1955 Chevy Bel-Air 210 4dr Wagon (under construction)
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