Spriddler, No, I'm referring to the rocker assembly. The exhaust rocker assembly has 1/8" - 1/4" float side to side in the Rocker box housing. The Rocker spindle or axle sits in a sleave, then in 2 brass bushes in the rocker box housing. Due to this float, (of which the intake rocker assembly has next to no float) we decided to turn up a bush to space out the exhaust rocker spindle from the housing to match that of the intake side. We did not alter the position of the rocker arm/tappit. Strangely, it seems that taking this float out, created noise in the exhaust follower in the bottom end, and or, it made the exhaust cam gear move in and out together with the timing chain, causing all sorts of noises.SPRIDDLER wrote:Marty, I'm assuming you're referring to the valve cam gears, shaft, and cover, not the 'rocker' ditto. which is at the top of th'engine.Matchymarty wrote:the rocker gear .......the exhaust rocker assembly............. the exhaust rocker spindle.......... what is the specified float in the exhaust rocker spindle?
Without sight of the bits I can only suggest that you compare the substitute gear, it's teeth, cam profile and the cover with the one you removed to see if there is any physical difference.
I'm not sure how you could be precise in shimming the zorst cam by ""putting a spacer in between the exhaust rocker spindle, to space it to match that of the intake assembly"" as the intake gear spindle is not visible when the cover is fitted. Perhaps you over-shimmed the zorst gear creating excessive end float in the (now noisy) intake gear spindle. The spindle end float required is just sufficient to give running clearance as there is no significant heat to cause any expansion.
Personally I'd just throw another shrimp on the barbie, pour a beer and enjoy the silence.
We have swapped for another rocker box assembly which has the 'float' in it, and noises are gone! So.... moral of the story... "if it ain't broke..... "
Still curious to know WHY?