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This is a 4.05mm thick with the 31mm outer diameter valve adjusting shims are a critical component used to set mechanical valve clearance (lash) on classic 1975–1985 Volkswagen and Audi 4-cylinder and 5-cylinder solid-lifter (mechanical) engines. These shims sit directly on top of the bucket lifters under the camshaft lobes to control the valve clearance for both gas and diesel configurations.

Key Technical Specifications

Diameter: 31.00 mm outer diameter.
Thickness: 4.05mm
Material: Hardened, premium-grade steel built to resist high friction and prevent surface wear.

Common Applications (1975–1985)

These solid-lifter shims fit a wide range of iconic water-cooled VW and Audi platforms from this decade before manufacturers transitioned to hydraulic lifters:

Volkswagen: Mk1 Rabbit/Golf, Jetta, Scirocco, Dasher, Quantum (covering 1.5L, 1.6L, 1.7L, and 1.8L gas engines, as well as 1.5L/1.6L naturally aspirated and turbo diesel engines).
Audi: Audi Fox, 4000, 5000, 5000 Turbo, and Coupe (covering 4-cylinder and 5-cylinder configurations).
Rabbit, Jetta, Scirocco, Quantum, & Dasher 1975-1984.
Jetta & Golf Diesel 1985-1986,
Quantum Diesel 1985,
Vanagon Diesel 1982-1985,
Cabriolet & Scirocco 8V 1985-1988