15 59 02 Checking guide for valve tappets · Before installing the valve tappet guide in the cylinder head, check it for damage

911 Carrera (996) Engine -Cylinder head, valve drive 15 59 02 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 displaysirregularities deviatingfrom the limit sample photo. Limit sample photo The irregularities shown in the limit sample photo are normal and must not be classified as damage influencingthe function of the part or requiring replacementof the part. A B / c- ( I / --1 ( ~ ~\ "\ -I '< «--- D 644_97 Permissible irregularities: A = Voids up to max. 1 mm2 C = Irregular contact patterns in the running surfaces of the valve tappet guide B = Fractures at the edges of the running surface of the valve tappet guide 0 = Grooves in the oil pockets 15 59 02 Checking guide for valve tappets 15 -81 Printed in Germany -10, 1998 9961581 ~I"~~