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knock from engine


davie

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Hi when I start my bike from cold my engine is fine after about 20sec there is a knock at idle from the left hand side it lasts for about a minute.

I have adjusted the rocker arm play and fitted the new cam chain tensioner.any other ideas my bike is a 03 R1150RT

with only 14000 miles.

Davie

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It's the cam chain slapping until its tensioner pressurizes. There is an update tensioner that solves it, but is really only an annoyance issue. Doesn't hurt anything.

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Maybe, only maybe, it could be the pushrods.

 

The ends become loose,and can knock until they get some heat - BMW have since changed the design .

 

Old design, showing the problem

 

 

pushrodhg7.jpg

 

Old design, with new design alongside

 

pushrod2jo8.jpg

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Hi when I start my bike from cold my engine is fine after about 20sec there is a knock at idle from the left hand side it lasts for about a minute.

I have adjusted the rocker arm play and fitted the new cam chain tensioner.any other ideas my bike is a 03 R1150RT

with only 14000 miles.

Davie

 

Davie, are you sure you installed the UPDATED cam chain tensioner parts & not just the stuff from the 1100/1150.. The parts you need are from the BMW 1200 engine..

 

 

 

1ea)--13541341797 Throttle body "O" ring (optional)

 

1ea)--07119963308 seal ring

 

1ea)--11317656922 piston

 

1ea)--11317688629 cylinder

 

 

 

 

Twisty

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