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N52 Oil Filter Housing LEAK - REPLACED Gasket and still leak?!

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N52 Oil Filter Housing LEAK - REPLACED Gasket and still leak?!

Old 04-22-2014, 11:29 AM
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Exclamation N52 Oil Filter Housing LEAK - REPLACED Gasket and still leak?!

Hi guys,

Over the weekend I replaced my Oil Filter Housing Gasket (DIY) on my 08 528i as per BMW quoting me $950 for them to do it. I bought the gasket online installed it Friday. However, the leak still exists and I was certain it was the Oil Filter Housing Gasket.
Below is a picture of where the oil is pooling up. If it's not the housing gasket, what could be the cause? Any help would be greatly appreciated. Attached picture below

imgur: the simple image sharer

**Update**
Oil Filter Cooler Housing Gasket replaced and absolutely zero sign of any oil leakage. For those replacing the Oil Filter Housing Gasket make sure to buy the Oil Filter Cooler Gasket as well (both are like $15). The Cooler gasket is easy as shit to replace and was most likely the cause of my issue. If you're unsure, start with the cooler gasket first! For those interested in pics just say the word and I'll post what I have.

**Update 2**
It's been a week. Still no signs of any leakage . Definitely was the oil filter cooler gasket causing the problem and not the oil filter housing gasket, but, if you're in there just do both.

Last edited by DC5Series; 05-02-2014 at 08:24 AM.
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Old 04-22-2014, 01:14 PM
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I had the same oil pooling in the same area in your picture when I took ownership of a used 2007 530i with an N52 engine and 77600mi. on the odo. I replaced both oil cooler to oil filter housing gasket and oil filter housing to engine block gasket and the leak has ceased.

Did you replace both gaskets indicated above? Did you clean the gasket "seat"/groove where the gasket sits into the housing?

If the answer is no to either one of these questions then these might be the source(s) of your leak.

Good luck and I hope you will be able to resolve your issue.
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Old 04-22-2014, 03:42 PM
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I've had oil in that same place from a crimped o-ring in the oil filter housing. I'd try that first since it is easy to get to.
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Old 04-22-2014, 03:53 PM
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Thanks gents... It may also be from further intense searching the Oil Coolant Housing gasket as well.. Not to mention, the oil seems to spray all over the fricken engine bay including the bottom of the hood. Maybe it's time to take the hood off and setup a GoPro to figure out what the heck is going on?
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Old 04-23-2014, 03:17 AM
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I second what TWH recommended checking the oil filter cap o-ring since doing this is the easiest to do first.


If you did not replace the oil cooler to oil filter housing gasket then it is a high probability that the oil leak is coming from that area.


No need for the gopro. The oil cooler gasket is easy to get to and replace compared to the oil filter housing gasket. The oil cooler gasket is inexpensive too. Just replace it if you haven't done it. Just clean the groove that the gasket sits in prior to installation.


These are the gaskets that were replaced and the broken bolt was a coincidental finding when I was cleaning the area around the valve cover. The bolt has no indication of having been tampered with :/.


The split in the gasket was my fault from removing it from the housing.
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Good luck and keep us posted.

Last edited by 3xv; 04-23-2014 at 03:20 AM.
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Old 04-23-2014, 03:45 AM
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Ah, I also had same problem and changed the O ring a couple times then purchased a new cap. Nothing seemed to work. I finally changed the housing gasket as mentioned above. I actually changed only the front one and not the one that sits on the engine block. On my N54 it took me about one hour. No more annoying leaking oil!
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Old 04-23-2014, 09:37 AM
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That oil leak should come from an oil cooler gasket for sure. I replaced last weekend and see no more leak in there.
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Old 04-23-2014, 03:25 PM
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Originally Posted by 3xv View Post
I second what TWH recommended checking the oil filter cap o-ring since doing this is the easiest to do first.


If you did not replace the oil cooler to oil filter housing gasket then it is a high probability that the oil leak is coming from that area.


No need for the gopro. The oil cooler gasket is easy to get to and replace compared to the oil filter housing gasket. The oil cooler gasket is inexpensive too. Just replace it if you haven't done it. Just clean the groove that the gasket sits in prior to installation.


These are the gaskets that were replaced and the broken bolt was a coincidental finding when I was cleaning the area around the valve cover. The bolt has no indication of having been tampered with :/.


The split in the gasket was my fault from removing it from the housing.




Good luck and keep us posted.
Seems the general consensus on multiple forums is indeed the Oil Filter Cooler Housing Gasket ($27 CAD from Stealership, $14USD from BavAuto) BMW Part #: 11 42 7 525 335

Once I buy the part and install I will report back with findings. I'm just wondering how the oil generously squirts all over the damn place.

Link to BavAutoWelcome to bavauto.com | Gasket - Oil Filter Housing to Oil Cooler
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Old 04-24-2014, 10:22 AM
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Keep us posted! take lots of photos before during and after!
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Old 04-24-2014, 01:24 PM
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Theire are two gaskets and I only replace the one. I also replaced the small o rings on the oil lines that come up from the bottom. A couple other possibilities could be the o ring on the cap and that you know where it goes or possible a cracked cap
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