Chucklesg Posted April 5, 2010 Share Posted April 5, 2010 Howdy Folks - Have an R1100RT (96) and noticed the right cylinder begins to tap rather loudly as the bike warms up over 4 bars. Did two separate (a month apart) valve adjustments just to make sure they were not the problem - minor tweaks but all within spec. All done on a cold engine. Still tapping loudly after the oil warms (yes just changed oil and filter). Up graded from 15W50 to 20W50 and the noise might be a smidge quieter but not by much... The tapping does not go away when I rev the engine and can be heard even at 4000 Rpm. Help... Chuck Link to comment
Ken H. Posted April 5, 2010 Share Posted April 5, 2010 How about rocker arm end play? Did you check/adjust that? Link to comment
Chucklesg Posted April 5, 2010 Author Share Posted April 5, 2010 Yes it was within spec but put it right in the middle. Link to comment
Chucklesg Posted April 5, 2010 Author Share Posted April 5, 2010 I just checked - spec for Rocker arm is between .05 - .3 and we set it to .18mm I just took an Audio/video with my cellphone just need to know where and how to attach the file so someone can hear the tapping if that would help. Chuck Link to comment
Selden Posted April 5, 2010 Share Posted April 5, 2010 I just checked - spec for Rocker arm is between .05 - .3 and we set it to .18mm .18mm is pretty loose for end play; the closer you get to minimum spec, the quieter the valve train will be. My theory is that BMW quotes such a huge range because few owners would be willing to pay the labor cost to get it "just right." Having the same clearance for each rocker is probably more important than achieving the minimum possible clearance. Link to comment
Alan D Posted April 5, 2010 Share Posted April 5, 2010 I wonder if you have a throttle plate that is worn. I did not keep my 1100 over 100,000 miles, but I understand the plates can get worn and make noise in the same area. Link to comment
philbytx Posted April 5, 2010 Share Posted April 5, 2010 Chuck, It is very likely that it is your RH Throttlebody adjuster tapping against the stop. Only proper way to check is to take your tupperware off and hold your finger on the cam. Link to comment
Chucklesg Posted April 5, 2010 Author Share Posted April 5, 2010 Here is a cellphone video of the engine cool - No Tapping http://www.metacafe.com/w/4407718 and here it is Hot (5 bars) and Tapping in sync with Rpm. http://www.metacafe.com/w/4407757 (Hope this video thing works - it's from my cellphone) Cheers, Chuck Link to comment
Chucklesg Posted April 5, 2010 Author Share Posted April 5, 2010 The Rocker arm gap was set to .18mm The intake gap was set to .15mm (.006 inch) the exhaust gap set to .30mm (.012 inch) Just took a stethoscope to the cylinder and it sounds like it might be tapping from the lower/rear side of the cylinder - near the block but still from the cylinder... (I fly helicopters for a living, I know squat about bikes :o) Chuck Link to comment
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