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DISCUSSION => Engine + Driveline => Topic started by: bimmerlover on January 31, 2007, 09:35:14 AM

Title: Chain noise at ~3500 rpms
Post by: bimmerlover on January 31, 2007, 09:35:14 AM

Okay.. I'm really puzzled about this. As some of you might remember.. my timing chain slipped during the summer and busted my motor. I put an m44 in with all new timing related parts (chain, guides, tensioner etc.).

Somehow I still have a lot of chain noise as if there is some kind of interference/wear going on. I took the valve cover off and took a peek.. everything appears to be okay. The noise becomes very noticable around 3500 rpms. Anybody have any thoughts?

Thanks

Rachel

Title: Chain noise at ~3500 rpms
Post by: dude8383 on January 31, 2007, 09:53:24 AM

have you changed the tensioner?

Title: Chain noise at ~3500 rpms
Post by: Alpine003 on January 31, 2007, 11:16:33 AM

Also, was everything torqued properly?

Title: Chain noise at ~3500 rpms
Post by: bimmerlover on January 31, 2007, 01:20:06 PM

Quote from: dude8383

have you changed the tensioner?

Yes..

Quote from: bimmerlover

all new timing related parts (chain, guides, tensioner etc.)

Quote from: Alpine003

Also, was everything torqued properly?

Yep, sure was.

Any other ideas?

Title: Chain noise at ~3500 rpms
Post by: ///Motorsport on January 31, 2007, 01:21:59 PM

I don't know.  But this makes me think, I've had predictable noise around this rpm, esp. partial throttle and decel, but figured it was somethign else.  I still hope its this shady heat shielding rattling around in the rear above the my muffler.

Title: Chain noise at ~3500 rpms
Post by: Febi Guibo on January 31, 2007, 04:39:22 PM

Well... When i started losing oil pan bolts, i would get intermittent chain noise... Maybe check yer lower pan for bolts with an oil change?

Title: Chain noise at ~3500 rpms
Post by: sheepdog on February 01, 2007, 01:22:38 AM

Check the lower timing chain sprocket, I will bet it is worn and the chain is stretched. Mine was doing this with a new tensioner for a while before the chain started to break up.