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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Oil cooler leak, need help ID part



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      12-10-2019, 09:30 AM   #1
JUMAS
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Oil cooler leak, need help ID part

Hello all,

I had my OFHG done less than a year ago along with the oil cooler.

I recently inspected my engine for leaks and I discovered that I have a very slow seep of oil on this part of the oil cooler. Now i don't have social media so I can't really ask on the n55/e90 pages on FB, but I figured you guys can help me.

The included picture shows a circled area in red where i have oil seeping, it is not a dribble, it is not dripping, you can just seen the thin line of oil and Im assuming it is rurnning down due to gravity and leaking on the engine itself as i see no evidence on the lines, belt, pulleys directly underneath it.

I can't find a gasket for this small plate on the oil cooler, does this mean I have to replace the whole oil cooling unit to solve the leak? is it possible it could be leaking from the oil cooler seal and up to that crevice ?

Thanks all!!!

ps the image i uploaded is upside down, but it is just for reference.
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Last edited by JUMAS; 12-10-2019 at 09:45 AM..
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      12-10-2019, 10:10 AM   #2
weehe126
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There is no gasket for that. You can take off the plate that you have circled, clean it up and see if that helps. It holds the thermostat so a spring will partially come out.
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      12-10-2019, 11:25 AM   #3
JUMAS
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Quote:
Originally Posted by weehe126 View Post
There is no gasket for that. You can take off the plate that you have circled, clean it up and see if that helps. It holds the thermostat so a spring will partially come out.
should that not work, then replacing the part might be the best bet? any idea what those tiny bolts are torqued to? I can assume they are one time use as many others in this platform ?

TIA!

EDIT:

def looks like there is a gasket in there according to a video and a few posts i found (knowing what to look for now lol,) but it is not sold separate. just my luck

EDIT 2:

https://www.e90post.com/forums/showthread.php?t=1209768

anyone have any confidence in using rvt for a selfmade gasket like someone mentioned in the thread?
or
has anyone bypassed the thermostat?

Last edited by JUMAS; 12-10-2019 at 11:49 AM..
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      12-10-2019, 11:50 AM   #4
JUMAS
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this could be another option $50 for a gasket basically, i can add the cover as style points xD

https://www.ftpmotorsport.com.tw/pro...stat-cover-kit
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      12-11-2019, 02:50 PM   #5
Dovydas.B
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Have the same problem :/
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      12-12-2019, 09:48 AM   #6
JUMAS
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Quote:
Originally Posted by Dovydas.B View Post
Have the same problem :/
I spent about a day looking into it lol; I ended up ordering this just to have the new gaskset lol https://www.ebay.com/itm/New-FTP-The...0078%7Ciid%3A1
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      01-09-2020, 05:36 PM   #7
JUMAS
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Just wanted to follow up that I installed that aftermarket cover and new seal and it has stopped the leak. ty all.
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