Hi Chalk Two,

Thanks for your reply.

Currently, the tips on the rocker arm (parts 11 in the schematics you have attached) are resting on the top of the valve stem (tip of part 2 in your schematic, as seen in the below picture). There is a freeplay (up-down) motion of about 0.7mm in the rocker arm, which seemed rather excessive to me. My interpretation was that there was too much play of the rocker arm (as if part 9 is moving up and down on part 10 in your schematic).

My question was if this much play on the rocker arm was considered normal on the exhaust side (the play on the rocker arm on the intake side is much less) or if something is wrong here.

Picture of current state - the rocker arm tips resting on top of the valve stem:


And the current freeplay in the rocker arm of about 0.7mm (note the inserted feeler gauge on the right hand side):