Sat, 6 Jun 1998 23:55:31 +0200 - Message No. 3330
From: T.M.Hauber@t-online.de (T.&M. Hauber)

Subject: strange engine noise


Hello folks,

may I ask you to help my in interpreting some strange noise from the inside of my 
 `93er @`s engine - oh, I know the cause of engine noises is a very difficult 
thing - but, may be one of you has had already the same:

my @ is a RD07 with 47.000 km. Since 1000 km I recognize an inceasing noise 
coming out of the right side of the engine. So I tried to locate this noise via 
"srewdriver-methode" but its not easy. In my opinion the centre of the noise is 
the middle of the front cylinder (please don`t say its some of this important 
bearings..!) but I also hear it in less volume at any other location of the front 
and rear(!) cylinder.
The strangest thing is, that the noise is really loud when I slow down and stop 
the cycle e.g. at crossroads. The longer the engine is in idle running the more 
this noise seems to vanish.
The noise itself is a high knocking like screwdriver on solid metal.

I recognize neither loss of power nor instabile idle running. No abnormal smoke 
out of the exaust or raising oil consumption. Clutch feels o.k. and valve 
clearance also has been adjusted. Just this "tck..tk..t..t..t.t.t."

Can you help me? Thanks a lot,

Martin








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