Re: chain tensioner?

[Robert Silas <robert.silas@xxxxxxxxxxxx>]

Allen,
I have a '94 R1100RS which I bought at 13,300 km on the clock. Now I have
170,000 km on the same engine without doing anyhing to it.
There was a noise at the time I bought the bike and the same noise is there
today.
When the transmission is in neutral and the clutch is not pulled, the noise,
a rattle type noise, is there. As soon as I pull the clutch lever the noise
stops. There is no noise during riding. In the beginning they told me that
the chain tensioner produces it, later I was told that's from the clutch.
None of those parts make that noise, it comes from the transmission, a BMW
trained mechanic told me. He also maintained that I should just forget about
it, not worth taking the trani apart.
The bike runs well, no problem with shifting.
I do not know if we are talking about the same noise, but that is what my
1100 engine does.
Mr. Cutter most likely could advise you on that.
Bob Silas
Montreal


----- Original Message -----
From: Allen Poole
To: oilheads@xxxxxxxxx
Sent: Tuesday, March 06, 2007 1:38 AM
Subject: chain tensioner?


On Mar 5, 2007, at 10:04 PM, Andren Appelquest wrote:

> The chain tensioning components of the oil pressure chain
> tensioning (2002 R1150RT) system are getting louder. It's not just
> at startup but lasts the entire ride (50-600 mi) and changes volume
> as a function of no correlatible variable that I can see.

I always assumed that a noise coming from my '94 R1100 engine was a
rod bearing starting to go.
It's a deep clunk sound, in synch with engine rpm, loudest at startup
(for a few revs before the oil pump makes pressure) and when oil is
thin (hot days, older oil)...  almost imperceptable when the engine
is under load with cold/new oil. Sounds a lot like the rod bearing
that failed on my 1976 90S, except that it's barely gotten any worse
in the 20,000 miles I've ridden this bike. The owner before me lugged
the engine, so I guessed rod bearing long ago and just started
monitoring the sound. I'm surprised at how little it's changed over
the miles.

Reading Andren's question, now, I wonder if my clunking could be a
"normal" sound from a chain tensioning mechanism. I guess it sounds
_a little_ like some noisy chains I've known over the years (Honda
small 4s, 16v Saab)

Can anyone with more oilhead experience help me know how to discern
the cause of my clunk?

Thanks,
Allen


____________________________
L. Allen Poole
R100GS (sport tractor)
R1100RS (transport appliance deluxe)


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