SECTION 10 – ENGINE – CHAPTER 1
10-3
EXHAUST VALVES
Face Angle
44
°
15’–44
°
30’ Relative to the Head of Valve
Stem Diameter
Std
: 9.401–9.421mm (0.3701–0.3709 in)
Oversize : 0.38mm (0.015 in)
9.781–9.802mm (0.3851–0.3859 in)
Head Diameter
42.88–43.13mm (1.688–1.698 in)
Stem to Guide Clearance
0.048–0.094mm (0.0019–0.0037 in)
INTAKE VALVES
Face Angle
29
°
15’–29
°
30’ Relative to Head of Valve
Stem Diameter
Std : 9.426–9.446mm (0.3711–0.3719 in)
Oversize : 0.381mm (0.015 in)
9.807–9.825mm (0.3861–0.3868 in)
Head Diameter
47.37–47.63mm (1.865–1.875 in)
Stem to Guide Clearance
0.023–0.069mm (0.0009–0.0027 in)
VALVE SPRINGS
Number per Valve
1
Free Length
60.70mm (2.390 in)
Length, loaded at 27.7–31.3kg (61–69 lb)
48.26mm (1.900 in)
Length, loaded at 61–69kg (135–153 lb)
35.69mm (1.405 in)
CAMSHAFT LOBE LIFT
Intake
8.36mm (0.330 in)
Exhaust.
8.36mm (0.330 in)
INSTALLED VALVE RECESSION
Intake
0.86– 1.32 mm (0.034 – 0.052 in)
Exhaust.
1.17– 1.65 mm (0.046 – 0.065 in)
VALVE INSERTS
Insert Oversize
Exhaust Valve Insert
Counterbore Diameter in
Cylinder Head
Intake Valve Seat Insert
Counterbore Diameter in
Cylinder Head
0.254mm (0.010 in)
44.17–44.20mm (1.739–1.740 in)
50.01–50.04mm (1.969–1.970 in)
0.508mm (0.020 in)
44.42–44.45mm (1.749–1.750 in)
50.27–50.29mm (1.979–1.980 in)
0.762mm (0.030 in)
44.68–44.70mm (1.759–1.760 in)
50.52–50.55mm (1.989–1.990 in)
