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DISCUSSION => Engine + Driveline => Topic started by: romkasponka on March 30, 2008, 08:58:44 AM

Title: small mod with two washers :)
Post by: romkasponka on March 30, 2008, 08:58:44 AM: After one bmw 318is owner in Lithuania tested (~1000km) this simple mod I tried it on my own M42. Two washers ~1mm thick each was installed between plug and hydraulic chain tensioner. Result: chain rattle disappeared in 2500-3000rpm band. :cool:

p.s. My engine block was shaved 0,9mm for 11:1 compresion ratio.
Title: small mod with two washers :)
Post by: 318is93 on March 30, 2008, 10:29:47 PM: This on a new or used tensioner piston?
Title: small mod with two washers :)
Post by: romkasponka on March 31, 2008, 01:50:11 AM: Quote from: 318is93;45800
This on a new or used tensioner piston?

This is on used ~20kkm tensioner.

Unfortunatly second impresion was not so good (first attempt was with cold engine), but it works.
Title: small mod with two washers :)
Post by: D. Clay on March 31, 2008, 11:59:36 AM: Do the washers go between the tensioner and the threaded plug that goes in behind it. I have thought about a mechanical version of the tensioner with an adjustment for the pressure as an alternative to the oil pressure/spring type that is OEM. Also with the tension applied by a toothed gear wheel instead of a guide rail. Timing belt cars use this approach with the external belt.
Title: small mod with two washers :)
Post by: 318is93 on March 31, 2008, 02:44:16 PM: How hard would that be to come up with something like that?
Title: small mod with two washers :)
Post by: romkasponka on March 31, 2008, 03:10:22 PM: Quote from: D. Clay;45816
Do the washers go between the tensioner and the threaded plug that goes in behind it.

Yes..
Title: small mod with two washers :)
Post by: Marcp on December 17, 2008, 06:33:28 PM: Anymore thoughts on this? Fed up with the 3000rpm rattle I have...
Title: small mod with two washers :)
Post by: roundel318 on December 17, 2008, 10:31:03 PM: Got a soundclip?
Title: small mod with two washers :)
Post by: Marcp on December 18, 2008, 07:11:42 PM: Dont want to try this at the weekend and then find it snaps the chain lol!
Title: small mod with two washers :)
Post by: batsbats on December 18, 2008, 07:58:49 PM: the heck? interesting.
Title: Ead
Post by: Jimmy Lewis on December 19, 2008, 08:07:53 PM: Eat a dick spam bot, kthx.
Title: small mod with two washers :)
Post by: Marcp on December 21, 2008, 06:08:05 PM: Tried this at the weekend, just one 1mm washer for now.

It worked! Sort of... still a little rattle at 3700rpm-4000rpm.

Then I drained the oil and found big end bearing peices.

DEEP JOY :)
Title: small mod with two washers :)
Post by: Deftones on December 22, 2008, 02:37:41 PM: why did you do this? wasn't it simpler changing the chain tensioner? i've done it on my 318is and it works well!
Title: small mod with two washers :)
Post by: TheDutch on February 15, 2009, 10:28:41 AM: Any more updates on whether this is a good idea or not?! Seems like it could be asking for trouble.
Title: small mod with two washers :)
Post by: JoeDellio on February 18, 2009, 09:22:07 PM: I dont see how this would work. The spring inside is just gonna soak up the extra tension from the washers. I dont think it would be 100% transfered to the chain. I think this is just asking for premature tensioner failure. Any one else with me?