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#524218 - 09/26/09 03:30 PM R1200RT Valve Clatter  
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tchap Offline
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tchap  Offline
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Right here!
I have a 2007 R12RT, 19000 miles. I get substantial valve train noise on hot or cold engine start. It's intermittment, about 30-40% of the time. I believe it's primarily the right hand side. This being my first Beemer I haven't studuied BMW's valve train and lubrication systems......yet. In my broader experience it acts like a loss of oil pressure due to a leaky check valve or something along those lines. The clatter lasts a second, goes away as soon as oil pressure builds.

Any thoughts or sharing similar experience would be appreciated!

#524219 - 09/26/09 03:39 PM Re: R1200RT Valve Clatter [Re: tchap]  
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GordonB Offline
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Huntington Beach, CA
Most likely the cam chain tensioner, if the noise goes away a second or two after startup, no problem. It's a fairly easy replacement if necessary.


2012 R1200RT
2007 R1200RT, sold
2000 R1100RT, off to boneyard
2005 Vespa GT, sold
#524251 - 09/26/09 07:33 PM Re: R1200RT Valve Clatter [Re: GordonB]  
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Dave_C Offline
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Dave_C  Offline
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Lancaster, CA
since you said it's mostly on the right side, i have to ask if you park the bike on the side stand or centerstand?


2006 R1200RT (Favorite all-around bike ever)
1995 R1100RS (sold)
1985 K100RS (sold)
#524276 - 09/26/09 09:57 PM Re: R1200RT Valve Clatter [Re: Dave_C]  
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tchap Offline
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tchap  Offline
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Right here!
Originally Posted By: Dave_C
since you said it's mostly on the right side, i have to ask if you park the bike on the side stand or centerstand?


Thanks Dave, I forgot to mention that part. I use the center stand probably 99% of the time.

#524336 - 09/27/09 01:25 AM Re: R1200RT Valve Clatter [Re: tchap]  
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Mister Tee Offline
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Mister Tee  Offline
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Northern California
I park my bike on the sidestand 100% of the time exept for maintenance. That is not the issue.

#524414 - 09/27/09 01:05 PM Re: R1200RT Valve Clatter [Re: Mister Tee]  
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CraigT Offline
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CraigT  Offline
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Scotland
I was advised that it was hydraulic tappets that had simply lost their fluid, but 'recharge' with a few turns of the engine. All three of mine have done this and I've noticed most of the boxers at the dealer doing this too, with no issue or raised concerns from any of the mechanics.

Just like the rattle off the dry clutch dukes, not exactly a 'design feature' but a characteristic of the machine that does no harm.


www.europastravels.com
09 K1300S
05 R1200ST (traded)
99 R1100S (traded)
96 R1100RS SE (sold)
#524421 - 09/27/09 01:29 PM Re: R1200RT Valve Clatter [Re: CraigT]  
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mneblett Offline
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Fairfax, VA
Originally Posted By: CraigT
I was advised that it was hydraulic tappets that had simply lost their fluid, but 'recharge' with a few turns of the engine. All three of mine have done this and I've noticed most of the boxers at the dealer doing this too, with no issue or raised concerns from any of the mechanics.

Just like the rattle off the dry clutch dukes, not exactly a 'design feature' but a characteristic of the machine that does no harm.

The R12 doesn't have hydraulic lifters. It does have a hydraulic cam chain tensioner on each side which can bleed down (in fact, the R1150's had their left tensioner redesigned to eliminate a cold start-up rattle). Sounds like the OP needs to look at replacing the right side tensioner.


Mark Neblett
Fairfax, VA
#524671 - 09/28/09 01:25 PM Re: R1200RT Valve Clatter [Re: mneblett]  
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Don_Eilenberger Offline
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Spring Lk, NJ, USA
It's pretty much "they all do that" - especially if left on the sidestand overnight. Mine is nice and quiet if I start it in the garage without taking it off the centerstand. If I wheel it out of the garage, leaving it on the sidestand for 2-3 minutes, I often get a bit of clatter from the right side for 2-3 seconds. If I park it with a warm engine on the sidestand for 20-30 minutes, it's about guaranteed I'll have clatter for 3-4 seconds on startup.

Asked a non-interested BMW mechanic to listen to it.. (non-interested in I wasn't going to have them do any work if it needed it..) He said most R12 engines make the noise, some will even clatter a bit if really hot and you're stuck in traffic. He felt it was nothing to be concerned about.

I'd be curious if anyone has replaced the chain tensioner on the right side and seen any change in the behavior.. it's not a terribly expensive part, and takes about 30 seconds to install a new one.


Don Eilenberger
'12 R1200R - Love this bike!
Spring Lake, NJ
#524680 - 09/28/09 01:40 PM Re: R1200RT Valve Clatter [Re: Don_Eilenberger]  
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Albert Offline
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Albert  Offline
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Hmm, mine too sits on the side stand for all but maintenance. I've never had any valve clatter as a result.


Al (that's not my picture!)
06 RT

"Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut."
Ernest Hemingway

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