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5-6 ENGINE TOP END
Specifications
Item Standard Service Limit
Clean Air System:
Vacuum switch valve clo
sing
Open → Close –––
pressure
41 ∼ 49 kPa (310 ∼ 370 mmH g, 6.0 ∼ 7.1
psi)
Camshafts:
Cam height:
Exhaust 36.146 ∼ 36.254 mm (1.4231 ∼ 1.4273 in.) 36.05 mm (1.419 in.)
Inlet 36.746 ∼ 36.854 mm (1.4467 ∼ 1.4509 in.) 36.65 mm (1.443 in.)
Camshaft journal, camshaft
cap clearance
0.028 ∼ 0.071 mm (0.0011 ∼ 0.0028 in.) 0.16 mm (0.0063 in.)
Camshaft journal diameter 23.950 ∼ 23.972 mm (0.9429 ∼ 0.9438 in.) 23.92 mm (0.942 in.)
Camshaft bearing inside
diameter
24.000 ∼ 24.021 mm (0.9449 ∼ 0.9457 in.) 24.08 mm (0.948 in.)
Camshaft runout TIR 0.02 mm (0.0008 in.) or less TIR 0.1 mm (0.004 in.)
Cylinder Head:
Cylinder compression (usable range)
1110∼ 1 590 kPa (11.3 ∼ 16.2 kgf/cm²,
161 ∼ 230 psi) @300 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.) –––
Inlet 0.15 ∼ 0.24 mm (0.0059 ∼ 0.0094 in.) –––
Valve head thickness:
Exhaust 1.0 mm (0.039 in.) 0.5 mm (0.020 in.)
Inlet 0.5 mm (0.020 in.) 0.25 mm (0.0098 in.)
Valve s tem bend TIR 0.01 mm (0.0004 in.) or less
TIR 0.05 m m
(0.002 in.)
Valve stem diameter:
Exhaust 3.955 ∼ 3.970 mm (0.1557 ∼ 0.1563 in.) 3.94 mm (0.155 in.)
Inlet 3.975 ∼ 3.990 mm (0.1565 ∼ 0.1571 in.) 3.96 mm (0.156 in.)
Valve guide inside diameter:
Exhaust 4.000 ∼ 4.012 mm (0.1575 ∼ 0.1580 in.) 4.08 mm (0.161 in.)
Inlet 4.000 ∼ 4.012 mm (0.1575 ∼ 0.1580 in.) 4.08 mm (0.161 in.)
Valve/valve guide clearance
(wobble method):
Exhaust
0.09 ∼ 0.18 mm (0.0035 ∼ 0.0071 in.) 0.40 mm (0.016 in.)
Inlet
0.03 ∼ 0.12 m
m (0.0012 ∼ 0.0047 in.)
0.33 mm (0.0
13 in.)
Valve seat cutting angle 45°, 32°, 60° –––
Valve seating surface:
Width: Exhaust 0.5 ∼ 1.0 mm (0.020 ∼ 0.039 in.) –––
Inlet 0.5 ∼ 1.0 mm (0.020 ∼ 0.039 in.) –––
Outside diameter :
Exhaust 21.6 ∼ 21.8 mm (0.850 ∼ 0.858 in.) –––
Inlet 26.4 ∼ 26.6 mm (1.0276 ∼ 1.0472 in.) –––