Lifter / Lash Adjuster: Testing and Inspection

Checking guide for valve tappets
Before installing the valve tappet guide in the cylinder head, check it for damage or existing defects. The valve tappet guide must be replaced if it displays irregularities deviating from the limit-sample picture.

Limit sample picture





The irregularities shown in the limit sample picture are normal and are not regarded as damage influencing the function of the part or requiring replacement of the part.

Permissible irregularities:
A = Voids up to max. 1 mm 2
B = Fractures at the edges of the running surface of the valve tappet guide
C = Irregular contact patterns in the running surfaces of the valve tappet guide
D = Grooves in the oil pockets