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Old 05-12-2009, 12:19 PM   #1
MLue1
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WARNING:V8 Timing Chain Tensioner & Guide Rails

I normally don't do cross post between forums but in this case I think it necessary. The E38 and X5 guys have been seeing some engine noises and other problems related to Timing Chain Tensioner & Guide Rails failures, since the V8 in our E39 is the same, this applies to our cars as well.

My car sounds fine so I will be doing the replacement of the lower timing chain tensioner as a maintenance item, just soon as I receive the part from Jared at EAC Tuning.

http://forums.bimmerforums.com/forum...hain+tensioner

http://forums.bimmerforums.com/forum...d.php?t=873820
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Old 05-12-2009, 01:17 PM   #2
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Another '99 owner, I'm going to do it this week, mine is making noise already and its really getting to my nerves with the noise.
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Old 05-12-2009, 01:44 PM   #3
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wow that looks like a HUGE job...
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Old 05-12-2009, 01:52 PM   #4
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I think you're supposed to replace the tensioner every 80K anyways, no?....
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Old 05-12-2009, 02:32 PM   #5
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Quote:
Originally Posted by myndgone View Post
I think you're supposed to replace the tensioner every 80K anyways, no?....
I don't think it is listed but I think if it had lasted this long on my car if I replace it I should be good to go. The theory is that if the chain is prevented from going slack the guides should remain intack for a longer peroid of time. The new chain tensioner has a longer effective length so hopefully it's more effective in taking up any excess slack in the chain.
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Old 05-12-2009, 03:00 PM   #6
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I've gone through this on bimmer forums as well, and its scray.

Mark you have a pic of the tensioner?

Here some scary photos.
Is this the chain guide rail that deteriorates (red arrow)?
Attached Images
File Type: jpg M62TIMINGCHAIN010.jpg (132.0 KB, 799 views)
File Type: jpg M62TIMINGCHAIN015.jpg (121.6 KB, 732 views)
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Old 05-13-2009, 02:08 AM   #7
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Thanks for the heads up, Mark!
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Old 05-13-2009, 10:04 AM   #8
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Who engineers these things? And do they still have a job?
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Old 05-17-2009, 02:24 PM   #9
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DIY and Part Info

Quote:
Originally Posted by Dado 540 View Post
Mark you have a pic of the tensioner?
Here is a pic of a new Lower Chain Tensioner for the M62TU engine.

Use this DIY guide:
http://forums.bimmerforums.com/forum...&postcount=151

Edit: Right now Autopartsway has good prices and availability on the Lower Timing Chain Tensioner 11317531813 and the Gasket Ring 07119963355:
http://www.autopartsway.ca/AutoParts...er=11317531813
http://www.autopartsway.ca/AutoParts...er=07119963355
Attached Images
File Type: jpg Lower Timing Chain Tensioner.JPG (9.1 KB, 671 views)
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Last edited by MLue1; 05-17-2009 at 03:30 PM. Reason: Adding Info
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Old 05-17-2009, 02:48 PM   #10
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^^

Pretty easy to replace!
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Old 05-21-2009, 11:33 AM   #11
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Thanks for sharing links and discussion. I have this on my to-do list
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Old 05-21-2009, 07:41 PM   #12
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Sounds like a rattle can of paint. I've got a whine, which I think is from the fan clutch.
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Old 05-22-2009, 08:23 AM   #13
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Tensioner and guides should last you 200,000Miles if not more, depending on your driving sytle and oil used. Your timing chain will outlast your car.
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Old 05-22-2009, 11:39 AM   #14
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Quote:
Originally Posted by Trouble65 View Post
Tensioner and guides should last you 200,000Miles if not more, depending on your driving sytle and oil used. Your timing chain will outlast your car.
The key word is "should" by most accounts or directly comparing the old part to the new, the new part has been modified to have a longer effective operating "reach" to further compensate for wear or chain streatch.
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Old 05-22-2009, 01:52 PM   #15
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I can't understand why the guides are not made from more tolerant material. You would assume that's something you would never have to worry about.
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