Service Manual — page 258 of 715

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5-8 ENGINE TOP END
Specifications

            Item                              Standard                       Service Limit
Camshafts
 Cam Height:
    Exhaust                   32.943 ∼ 33.057 mm (1.2970 ∼ 1.3015 in.) 32.84 mm (1.293 in.)
    Intake                    32.943 ∼ 33.057 mm (1.2970 ∼ 1.3015 in.) 32.84 mm (1.293 in.)
 Camshaft Journal, Camshaft 0.038 ∼ 0.081 mm (0.0015 ∼ 0.0032 in.)        0.17 mm (0.0067 in.)
 Cap Clearance
 Camshaft Journal Diameter 23.940 ∼ 23.962 mm (0.9425 ∼ 0.9434 in.) 23.91 mm (0.9413 in.)
 Camshaft Bearing Inside      24.000 ∼ 24.021 mm (0.9449 ∼ 0.9457 in.) 24.08 mm (0.9480 in.)
 Diameter
 Camshaft Runout              TIR 0.02 mm (0.0008 in.) or less           TIR 0.1 mm (0.004 in.)
Cylinder Head
 Cylinder Compression         (Usable Range)
                              770 ∼ 1 198 kPa (7.9 ∼ 12.2 kgf/cm², 112 ∼         – – –
                              174 psi) @236 r/min (rpm)
 Cylinder Head Warp                             – – –                     0.05 mm (0.002 in.)
Valves
 Valve Clearance:
    Exhaust                   0.22 ∼ 0.31 mm (0.0087 ∼ 0.0122 in.)               – – –
    Intake                    0.15 ∼ 0.24 mm (0.0059 ∼ 0.0094 in.)               – – –
 Valve Head Thickness:
    Exhaust                   0.8 mm (0.031 in.)                           0.6 mm (0.024 in.)
    Intake                    0.5 mm (0.020 in.)                           0.3 mm (0.012 in.)
 Valve Stem Bend              TIR 0.01 mm (0.0004 in.) or less           TIR 0.05 mm (0.002 in.)
 Valve Stem Diameter:
    Exhaust                   4.455 ∼ 4.470 mm (0.1754 ∼ 0.1760 in.)      4.44 mm (0.175 in.)
    Intake                    4.475 ∼ 4.490 mm (0.1762 ∼ 0.1768 in.)      4.46 mm (0.176 in.)
 Valve Guide Inside Diameter:
    Exhaust                   4.500 ∼ 4.512 mm (0.1772 ∼ 0.1776 in.)      4.58 mm (0.180 in.)
    Intake                    4.500 ∼ 4.512 mm (0.1772 ∼ 0.1776 in.)      4.58 mm (0.180 in.)
 Valve/Valve Guide
 Clearance (Wobble Method):
    Exhaust                   0.08 ∼ 0.16 mm (0.0031 ∼ 0.0063 in.)        0.35 mm (0.014 in.)
    Intake                    0.03 ∼ 0.10 mm (0.0012 ∼ 0.0039 in.)        0.30 mm (0.012 in.)
 Valve Seat Cutting Angle     32°, 45°, 60°                                      – – –
 Valve Seating Surface:
    Width:
       Exhaust                0.8 ∼ 1.2 mm (0.031 ∼ 0.047 in.)                   – – –
       Intake                 0.5 ∼ 1.0 mm (0.020 ∼ 0.039 in.)                   – – –
    Outside Diameter:
       Exhaust                24.7 ∼ 24.9 mm (0.972 ∼ 0.980 in.)                 – – –
       Intake                 28.9 ∼ 29.1 mm (1.138 ∼ 1.146 in.)                 – – –
 Valve Spring Free Length:
    Exhaust                   35.9 mm (1.41 in.)                           34.7 mm (1.37 in.)
    Intake                    36.3 mm (1.43 in.)                           35.3 mm (1.39 in.)