volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Valve Spring > < Valve Seat|Service and Repair
Page 2
background image

Refacing intake valve seat

a

26.2 mm

b

= Maximum allowable refacing dimension* 

c

1.5 to 1.8 mm 

Z

= Lower edge of cylinder head

a

45° Valve seat angle

p

30° Upper correction angle

y

60° Lower correction angle

Refacing exhaust valve seat

a

29.0 mm

b

= Maximum allowable refacing dimension* 

c

= approximately 1.8 mm 

z

= Lower edge of cylinder head

a

45° Valve seat angle

p

30° Upper correction angle

Y = 60° Lower correction angle
*) How to calculate maximum permissible refacing dimension.

Valve Spring > < Valve Seat|Service and Repair