Golf L4-1.9L DSL Turbo (ALH) (1999)
Intake valve seat, reworking
a = 35.7 mm diameter
b = 1.6 mm
45°= Valve seat angle
Note: The 30° lower valve seat chamfer is necessary to ensure that the intake channel flow characteristics are maintained.
Exhaust valve seat, reworking
a = 31.4 mm diameter
b = 2.7 mm
45° = Valve seat angle