Checking Guide For Valve Tappets

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 photo.

Limit sample photo





The irregularities shown in the limit sample photo are normal and must not be classified as damage influencing the function of the part or requiring replacement of the part.

Permissible irregularities:
A = Voids up to max. 1 mm (squared)
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