The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: montmil on April 05, 2009, 06:21:01 PM

Title: Timing chain & more
Post by: montmil on April 05, 2009, 06:21:01 PM

Input from experienced hands needed.

Would you recommend replacing the noted bearings during the timing chain replacement ordeal?  I have a nagging suspicion that part of my worrisome noise problem may include these items... particularly the flange bearing.

I don't think the ball unit would be generating the noise I'm hearing.

Flange Bearing - #4 in diagram:

http://www.realoem.com/bmw/showparts.do?model=0364&mospid=47851&btnr=11_1697&hg=11&fg=30

How about the big ol' ball bearing, too? #8 in the diagram:

http://www.realoem.com/bmw/showparts.do?model=0364&mospid=47851&btnr=11_1716&hg=11&fg=25

Thanks. I'm planning a parts order and once I get into this deal I don't want to be slowed down.   Monte

Title: Re: Timing chain & more
Post by: Bob_Roller on April 05, 2009, 06:33:21 PM

How many miles on the bike ?

Title: Re: Timing chain & more
Post by: nhmaf on April 05, 2009, 07:35:37 PM

Are you planning to replace the sprockets?  If the teeth have gone really pointy at the ends or have developed a "hook" shape or significant wear pattern, its best to replace them as well with the new chain.  If you're pulling the sprockets off, I don't know if there is too much more work  to get to the bearings..

Title: Re: Timing chain & more
Post by: montmil on April 06, 2009, 05:56:59 AM

Mileage unknown as the dreaded non-functional odometer was included with the bike's purchase. From condition, I'd guess around 40K.

Haven't seen the timing chain sprockets or other components as the bike has not yet been opened up.

Besides the chain itself, I'm wondering about the flange bearing. Since it's a bushing, it would seem to be more prone to wear than a ball bearing...?

Read the Snowbum timing chain tech article. Still trying to sort out the wheat from the chaff in that one! Couple other internet articles and the latest on our R65 site.

Trying to get prepared; hoping for the best but expecting the unknown...

Monte

Title: Re: Timing chain & more
Post by: Bob_Roller on April 06, 2009, 10:33:29 AM

I replaced my chain around the 40-45,000 mile area, and the sprockets and chain tension-er parts were in great condition.

Unless the bike was really abused, I don't think the front crank shaft bearing, or cam bearing is going to be in need of replacement.

These engines are good for over 100,000 miles before any real attention is needed for the 'bottom end'.

The reason I replaced mine then, was because of a vibration I had, replaced the chain, no help, it was the beginning of the transmission bearing issues that were brought on by water in the transmission.

Title: Re: Timing chain & more
Post by: montmil on April 06, 2009, 06:56:15 PM

Quote

...Unless the bike was really abused, I don't think the front crank shaft bearing, or cam bearing is going to be in need of replacement.

These engines are good for over 100,000 miles before any real attention is needed for the 'bottom end'.

Thanks, Bob. I'm feeling the love here.  [smiley=2vrolijk_08.gif]

Title: Re: Timing chain & more
Post by: steve hawkins on April 08, 2009, 07:05:47 AM

Actually the bottom ends are good for almost 200,000 miles if you treat them right.

I would not pull a bottom end apart for any reason.  If it is bad I would replace it, it would be cheaper.  But then thay are that long lived I probably will never have to.

But I have to agree with every thing else Bob said.

My timing chain was replaced at 94,000 miles - again only the chain.