jotajoe
Hero member
- Location
- Warwickshire UK
Thanks Red...It's becoming clearer now you guys are giving me the training 
)
joe
)joe
can a camchain be TOO tight?
- Thread starter beauchemin
- Start date
beauchemin
Senior member
- Location
- Victoria, British Columbia
jotajoe said:Thanks Phil,
Now I get it
The taller blocks raise the camshaft a touch. Skimming the head moves the valves closer to the piston..
Aren't afternoons a wonderful invention !
joe
In my case I had the top of the barrel flattened slightly, as well as the bottom and top of the head. The total amount removed was reported to me as @ 0.2mm, which is what led me to compensate with the +0.2mm offset blocks. My suspicion is that the machinist removed less than that. I'm going to try the standard offset blocks and see what the chain tension is. Will report back.
I gave up with it all.....cracked heads, smoking exhausts even after guides done...bought the unused head off the display engine in Slaters, plus the pistons and barrels. Cannot help but think the future will only be bright if we get some new heads from somewhere..3 d printing somebody ..please?
beauchemin
Senior member
- Location
- Victoria, British Columbia
Update:
Problem fixed with the 0.0 (zero) offset cam
blocks.
The tension went from 2mm slack (as per the factory manual's measurement) without the tensioner blade installed, to 5mm slack with the tensioner blade installed (but with no extra tension applied.)
It is quite surprising how much an effective increase in camchain length (+ 0.4mm) affects the chain tension.
Chris
Problem fixed with the 0.0 (zero) offset cam
blocks.
The tension went from 2mm slack (as per the factory manual's measurement) without the tensioner blade installed, to 5mm slack with the tensioner blade installed (but with no extra tension applied.)
It is quite surprising how much an effective increase in camchain length (+ 0.4mm) affects the chain tension.
Chris