Okay so i just got my RB25 head back from the workshop.
it had 12 rooted valve guides (some asshat had bashed them out with the wrong size punch) so 12 new custom ones were made up from CA18 guides which have the same ID and OD but are a bit longer. hence, 4mm or so was machined from the end of them to bring them back to the correct length.
all 24 valves were re-seated and the spring assemblies re-installed.
there are NO differences in the heights of the inlet and outlet lifters.
so.... WHY THE HELL DO SOME OF MY VALVES HAVE DIFFERENT LIFT?!?!?!
the cams are installed correctly, torqued correctly etc. only SOME of the valves do this, there's five sets of valves which show the problem, but not all on the same cylinders, and on both inlet and exhaust sides! see photos:
sorry i couldn't get a good shot of the problem, but you can see how the two exhaust valves in the 2nd picture are different heights at full lift, wtf?
so what is going on here guys...?