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      11-13-2013, 02:18 PM   #1
335e92tx
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bad seal between Oilfilter housing and coolant passage

Well, I had a coolant leak that started a week or so ago. The local indy could not track it down. The BMW dealer said that it was a bad seal in the oil filter housing that is letting coolant get into the oil. The wanted 687 to replace the seal and another 350 for the coolant flush and oil change.

They said the parts are only about 40$ and there is 5.4 hours of labor on the seal replacement. Im trying to find a repair estimator that includes this and I dont see it listed as a common repair on repairpal.com

Anybody else seen this? grrr..
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      11-13-2013, 02:22 PM   #2
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Quote:
Originally Posted by 335e92tx View Post
Well, I had a coolant leak that started a week or so ago. The local indy could not track it down. The BMW dealer said that it was a bad seal in the oil filter housing that is letting coolant get into the oil. The wanted 687 to replace the seal and another 350 for the coolant flush and oil change.

They said the parts are only about 40$ and there is 5.4 hours of labor on the seal replacement. Im trying to find a repair estimator that includes this and I dont see it listed as a common repair on repairpal.com

Anybody else seen this? grrr..
Oil filter housing gasket failure is fairly common. Take it to a good indy and save yourself a tonnnn of money.
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      11-13-2013, 02:43 PM   #3
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No local indy seems to know what it is - or could give me an estimate on time. The one I just got off the phone with says never worked on an n54. I just as soon leave it where it is than have to pay someone to tow it somewhere and the shop still not have experience with it.

I see a diy out there http://www.e90post.com/forums/showthread.php?t=791674 but i can't conceive how this repair would take a dealer 5.4 hours?

Edit, I guess the original DIY was for an n52. Seems like the one for the n54 is ugly.
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      11-13-2013, 04:21 PM   #4
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Do you have an oil cooler. Almost certainly if you have the sport package. Maybe 25% chance without sport package. With an oil cooler, the job is significantly tougher. No oil cooler should be a two hour job.
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      11-14-2013, 11:02 AM   #5
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Yeah, I guess I am just coming up to speed on this now. The car is a steptrans but was built in 10/2006 so it didn't have an OC originally but the local dealer put one on after I complained about oil temps. So, I guess I kind of shot myself in the foot on that deal.

However, anyway you slice it OC or not - and even n54 or n52, it seems this is the same basic design on both motors with a very thin gasket separating the two passages.. Thats just brain dead.

Any engine that is potentially a single piece of material away from a failure/complete replacement if the two fluids combine should not be considered well designed and in no way should make it to list of ward's best engines for the year (let alone several years).

The local dealer implied they haven't seen these up to this point and they initially thought it was a head gasket. I told them not only have there been a number of gasket failures in the last year (for both motors) but I also said that someone went to the trouble of writing up DIYs for them.. if that doesn't make it clear to them this is asinine I don't know what will.
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      11-16-2013, 09:24 AM   #6
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Well, it could be worse I guess, in the process of them replacing the gasket, they found out that the waterpump (which had been replaced in March 2012) was leaking, so they did that under warranty. Trouble is, when they were putting it back together, they said it was running bad so they had to backtrack. Wont get it until monday. They did give me a loaner - but its a mazda SUV. I will be GLAD to get my car back.
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      11-16-2013, 01:31 PM   #7
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Quote:
Originally Posted by 335e92tx View Post
in the process of them replacing the gasket, they found out that the waterpump was leaking
I believe the two are related. They very often fail at the same time. I think the little bits of gasket begin circulating through the coolant system and F-up the electronic waterpump. I hope you got them to replace the thermostat while they were at it!
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      11-16-2013, 03:47 PM   #8
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I thought the thermostat replacement was std practice on a wp, but will check early mond just to make sure. Good point thanks
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