99 540 M62tu timing chain tensioner oil leak - Bimmerfest - BMW Forums



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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 10-12-2018, 03:12 PM
Panel beater Panel beater is offline
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99 540 M62tu timing chain tensioner oil leak

Hello all I finished a total timing chain guide job as well as vanos reseal and clean and reseal all parts involved with the job. I did run into a problem with timing and codes .i resolved that issue with the help of you guys. I have an oil leak that is coming from the timing chain tensioner for sure. When I installed the new tensioner I noticed there was no o ring on the cap that screws into the block. I already threw out my old parts to check the old cap. My question is should it have some sort of seal or o ring on the cap????? All you feedback is appreciated.
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Old 10-12-2018, 03:45 PM
atobe atobe is offline
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There's a crush washer #20
http://www.realoem.com/bmw/enUS/show...diagId=11_2264
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Old 10-12-2018, 11:20 PM
777-300ER 777-300ER is offline
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Should be a brass washer in the box.
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Old 10-12-2018, 11:44 PM
Chedley Chedley is online now
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When you did the timing chain guides job, and removed the old tensioner, did you find and remove the washer ?!
If not, that old washer may have been stuck to the engine block. Remove the tensioner, AND the old washer -scratch it out-. Then reinstall the new tensioner (with the longer spring) and a new washer.
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Last edited by Chedley; 10-12-2018 at 11:55 PM.
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Old 10-13-2018, 08:05 AM
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Joe-BMW Joe-BMW is offline
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The timing chain guide tensioner does not come with a new O ring. I found out the hard way. The old one sometimes sticks to the block. Sound like you lost the old one. Itís aluminum not brass.

Order one online or stop by a dealer. They have them in stock. Alternatively, when I was stuck without one, I found a package of copper O rings at autozone and one matched perfectly. I still replaced it though with the correct aluminum BMW part.


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Old 10-15-2018, 03:03 AM
Panel beater Panel beater is offline
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Yes I did find the washer ,it was with the kit I bought but it was labeled " differential seal" so I thought it was somthing in the kit that wasn't for my application .i thought it was for an X5 application or somthing.
I installed it no more leak, test drive was good no check engine lights!!!!! Project was a success!!!!!!
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Old 10-15-2018, 05:29 AM
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Joe-BMW Joe-BMW is offline
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Quote:
Originally Posted by Panel beater View Post
Yes I did find the washer ,it was with the kit I bought but it was labeled " differential seal" so I thought it was somthing in the kit that wasn't for my application .i thought it was for an X5 application or somthing.
I installed it no more leak, test drive was good no check engine lights!!!!! Project was a success!!!!!!
Nice! Hopefully if you had a rattle on cold start it's gone.
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Old 10-15-2018, 10:21 AM
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Quote:
Originally Posted by Joe-BMW View Post
The timing chain guide tensioner does not come with a new O ring. I found out the hard way. The old one sometimes sticks to the block. Sound like you lost the old one. Itís aluminum not brass.

Order one online or stop by a dealer. They have them in stock. Alternatively, when I was stuck without one, I found a package of copper O rings at autozone and one matched perfectly. I still replaced it though with the correct aluminum BMW part.


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... and O-rings are made of rubber, and shaped like a toroid.
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Old 10-15-2018, 10:48 AM
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Joe-BMW Joe-BMW is offline
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Originally Posted by edjack View Post
... and O-rings are made of rubber, and shaped like a toroid.
Nope, they are aluminum for sure - I have like 12 of them:

https://www.ecstuning.com/b-genuine-...h/07119963418/

(it's not often I am right here

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Last edited by Joe-BMW; 10-15-2018 at 10:53 AM.
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