'76 RS pushrod rattle

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Re: '76 RS pushrod rattle

Post by Wobbly » Fri Sep 01, 2017 3:11 pm

Shades wrote:
Fri Sep 01, 2017 8:53 am
I really do think it's one or both of the pushrods on the left side that is rattling at a certain frequency (equal to 3000rpm).
Then you'd hear it directly when you hold a screwdriver between your ear and the tube, like a stethoscope, when you have a friend run the engine up to 3000 RPM.

No guessing there ! ;)
After 20 years as a professional bike mechanic and 30 years as an engineer I know just enough to be dangerous !

Posts: 435
Joined: Sun Jan 30, 2011 4:03 pm

Re: '76 RS pushrod rattle

Post by robert » Fri Sep 01, 2017 3:42 pm

Could be a broken lifter, it happens.

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