Isuzu AA-6HK1T, Workshop Manual

Page: 17 / 242

0A–12 GENERAL INFORMATION
Service Standards
ITEMS SERVICE STANDARD SERVICE LIMIT
Cylinder Head
Lower Face Warpage mm (in) 0.05 (0.002) or less 0.20 (0.008)
Do not regrind the lower face.
Valve Guide
Valve Stem Clearance
Intake mm (in) 0.04 – 0.06 0.20
(0.0016 – 0.0024) (0.008)
Exhaust mm (in) 0.06 – 0.10 0.25
(0.0024 – 0.0039) (0.010)
Valve Stem Outside Diameter
Intake mm (in) 7.95 – 7.96 7.89
(0.3130 – 0.3134) (0.3106)
Exhaust mm (in) 7.92 – 7.94 7.89
(0.3118 – 0.3126) (0.3106)
Valve Guide Upper End Height mm (in) 14.1 (0.56) —
Valve and Valve Seat Insert
Valve Thickness
Intake mm (in) 1.71 (0.067) 1.30 (0.051)
Exhaust mm (in) 1.75 (0.069) 1.30 (0.051)
Valve Depression
Intake mm (in) 1.0 (0.039) 2.5 (0.098)
Exhaust mm (in) 1.3 (0.051) 2.8 (0.110)
Valve Contact Width
Intake mm (in) 2.5 (0.098) 3.2 (0.126)
Exhaust mm (in) 2.0 (0.079) 2.8 (0.110)
Valve Face Angle
Intake deg 30 —
Exhaust deg 45 —
Valve Spring
Spring Height
Intake mm (in) 65.9 (2.59) 64.6 (2.54)
Exhaust mm (in) 68.1 (2.68) 66.7 (2.63)
Spring Squareness
Intake mm (in) 2.9 (0.114) 3.0 (0.118)
Exhaust mm (in) 3.0 (0.118) 3.0 (0.118)
Intake Valve Spring Tension/
Compression Height N (kg / lb) 348 (35.5 / 78) / 46
Exhaust Valve Spring Tension/
Compression Height N (kg / lb) 383 (39.0 / 86) / 46