Cylinder Head Machining

Cylinder Head Height Specifications
Overall Height 98.40 - 98.50 mm (3.8740 - 3.8780 in)
Minimum Height 97.80 mm (3.8504 in)

Permissable deviation from flatness of contact surface:
In longitudinal direction 0.15 mm (0.006 in)
In transverse direction 0.05 mm (0.02 in)

Permissable deviation of parallelism of top to bottom contact surface in longitudinal direction:
Maximum 0.1 mm (0.004 in)

Peak to valley height
Maximum 0.003 - 0.010 mm (0.0001 - 0.0004 in)

NOTE:
- Only machine cylinder head contact surface if porous or damaged points are found.

Valve Head To Cylinder Head Mating Surface Clearance





Minimum Distance A, With New Valve Seats And New Valves:
Intake Valve 1.2 mm (0.047 in)
Exaust Valve 0.5 mm (0.020 in)

Maximum Distance A, With Reworked Valve Seats and Reground Valves:
Intake Valve 2.1 mm (0.083 in)
Exaust Valve 1.4 mm (0.055 in)