audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Valve Seat|Specifications|Page 1422 > < Valve Guide|Specifications|Page 1418
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Valve Seat: Specifications

MINIMUM VALVE STEM DEPTH

Measure distance (arrow) between end of valve stem and top surface of cylinder head.

Minimum dimensions:

At intake valve: 36.4 mm (1.433 inch).
At exhaust valve: 36.4 mm (1.433 inch).

INTAKE VALVE SEAT

a - Diameter: 31.9 mm (1.255 inch).
b - Seat width: 1.5-1.8 mm (0.059-0.071 inch).
Correction angle: 75°.
Valve seat angle: 45°.
Z - Bottom surface of cylinder head.

EXHAUST VALVE SEAT

a - Diameter: 26.0 mm (1.024 inch). 
b - Seat width: 1.5-1.8 mm (0.059-0.071 inch). 
Correction angle: 75°.
Valve seat angle: 45°. 
Z - Bottom surface of cylinder head

Valve Seat|Specifications|Page 1422 > < Valve Guide|Specifications|Page 1418