Cylinder Head — Specifications

Cast iron cylinder head with in-line valves.

Valve guides

Valve guides made of special cast iron are pressed into the cylinder head.

Inlet and outlet valve guide inner diameter

7.907 - 7.938 mm

Valves

Working clearance of valves on a cold engine, mm:
- inlet	0,22
- high school graduation	0,59
Valve dimensions, mm
Inlet valve:
- length	105,45 – 106,45
- plate diameter	38,02 – 38,28
– rod diameter:
nominal	7,866 – 7,868
enlarged by 0.076 mm	7,944 – 7,962
enlarged by 0.38 mm	8,249 – 8,267
– gap between the valve stem and the guide sleeve	0.021 - 0.070 mm
- valve lift	9.448 mm
Exhaust valve:
- length	105,15 – 106,15
- plate diameter	29,01 – 29,27
– rod diameter:
nominal	7,846 – 7,864
enlarged by 0.076 mm	7,922 – 7,940
enlarged by 0.38 mm	8,227 – 8,245
– gap between the valve stem and the guide sleeve	0.043 - 0.092 mm
– valve lift	9.306 mm

Valve seats

Inlet and outlet valve seat width	1.20 - 1.70 mm
Seat Angle	450
Top cone angle	300
Lower Cone Angle	750

Valve springs

The springs are the same for intake and intake valves.

Number of coils of spring	6
Spring free length	42.0 mm