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Cam Idler Roller.

Snap a timing belt on this type of motor and the valves stop opening and closing, but those pistons keep slamming up and down. Bent valves, broken lifters, even a broken camshaft could be the outcome! Keep the relationship between your pistons and valves civil by performing proper timing and balance shaft belt maintenance. Due to the complexity and options, please choose all of the parts that apply to your vehicle carefully.

Fits:
Porsche 924S 1986-88
Porsche 944 1983-89*
Porsche 944 S, 944 S2, 944 Turbo
Porsche 968 1992-95

*see Notes 2 & 3
Note 1: Also fits early 87 924S up to engine # 43H01919 (Manual Trans) & 43H60384 (Auto Trans)

Note 2: Also fits early 87 924S from engine # 43H01920 (Manual Trans) & 43H60385 (Auto Trans)

Note 3: Early cars (83-86) that have been updated to the later style waterpump with belt guard rail will use this roller.


Click picture for large parts diagram.
Diagram Ref No 6.