Pulled my rocker box and head apart to check everything out and measure for spec today. Think my rocker arms and rocker IDs are just at the wear limit or just slightly outside. So will probably be looking for rocker arms as well (they also have some visible wearing) but I know those are pretty available. (couple pics here)
It would seem I've tracked down my RH piston carbonization issue...the backside of the RH intake valve was pretty carboned up and even a little wet looking compared to the LH side, so seems that the faulty valve seal was there.
Couple questions for the group...
1) This is a dumb question.....but any general advice for measuring parts with a digital set of verniers? I'll be honest....I never have a whole lot of confidence when I do this. Do you try to use the very ends of the calipers? Anywhere along their length? Do you try to close them with some force? Or lightly? I can generally get pretty consistent readings, but it seems like if I change the variables I just mentioned I can get slightly different readings so just looking for some best practices if ya got 'em.
2) Regarding cam specs (
@TwoManyXS1Bs I was looking at cam lobe specs per your earlier post)....any advice for capturing the "A" measurement (overall height from base to top of lobe)? Should I try to draw an imaginary line of bisection through the camshaft and measure across that (i.e. straight up and down)? The lobes are eccentric so doing that way isn't the longest diameter and it's challenging to ensure I am consistently measuring through that imaginary 'bisection plane", if that makes sense.
3) Does anyone have any experience with a WebCam 59a grind? (I believe these emulate the original XS1/XS2?). Would this be considered a "high-lift" cam? I've seen caveats on valve seals and/or keepers about not being for use with "high-lift" cams, but I don't really see this defined anywhere.
Thanks all.
Oh....as an aside....I got my new high performance valve seals (copper/black colored) as well as the Viton ones
@5twins recommended (blue). Few pics of both....the "high performance" ones are about 1mm lower profile. In case that's useful for anyone.