Top end noise is greatly reduced by shimming the cam end play.

CAM BLOCKS

CAMSHAFT END PLAY 0.1mm-0.2mm(.004"-.008")

PART NO.	DESCRIPTION	THICKNESS
156-17417-00	Shim	0.1mm

      Install enough shims to reduce end play to recommended clearance.

EXAMPLE

END PLAY	NO. OF SHIMS	CLEARANCE
0.7mm	0.1 x 3 pcs. x 3 pcs.	0.1mm
0.6mm	0.1 x 2 pcs. x 2 pcs.	0.2mm

      The purpose here is to get an equal number of shims on each end of the cam.