ENGINE TOP END 5-7
Specifications
Item Standard Service Limit
Valve/valve guide clearance
(wobble method): Exhaust 0.09 ∼ 0.18 mm 0.40 mm
(0.0035 ∼ 0.0071 in.) (0.016 in.)
Inlet 0.03 ∼ 0.12 m m 0.33 mm
(0.0012 ∼ 0.0047 in.) (0.013 in.)
Valve seat cutting angle
45°, 3
2°, 60°
---
Valve seating surface:
Width: Exhaust 0.8 ∼ 1.2 mm (0.031 ∼ 0.047 in.) ---
Inlet 0.5 ∼ 1.0 mm (0.020 ∼ 0.039 in.) ---
Outside diameter: Exhaust 25.2 ∼ 25.4 mm (0.992 ∼ 1.000 in.) ---
Inlet 29.4 ∼ 29.6 mm (1.1575 ∼ 1.1654 in.) ---
Valve spring f ree length: Exhaust 39.0 mm (1.535 in.) 37.4 mm
(1.472 in.)
Inlet 39.0 mm (1.535 in.) 37.4 mm
(1.472 in.)
Cylinder, Piston:
Cylinder inside diameter 77.194 ∼ 77.206 mm 77.30 mm
(3.0391 ∼ 3.0396 in.) (3.0433 in.)
Piston diameter 77.174 ∼ 77.184 mm 77.02 mm
(3.0383 ∼ 3.0389 in.) (3.0323 in.)
Piston/cylinder
clearance
0.010 ∼ 0.037 mm ---
(0.0004 ∼ 0.0015 in.)
Piston ring/groove
clearance:
Top
0.04 ∼ 0.08 mm 0.18 mm
(0.0016 ∼ 0.0031 in.) (0.0071 in.)
Second 0.03 ∼ 0.07 m m 0.17 mm
(0.0012 ∼ 0.0028 in.) (0.0067 in.)
Piston ring groove width: Top 0.83 ∼ 0.85 mm 0.93 mm
(0.0327 ∼ 0.0335 in.) (0.037 in.)
Second 0.82 ∼ 0.84 m m 0.92 mm
(0.0323 ∼0.0331 in.) (0.036 in.)
Piston ring thickness: Top 0.77 ∼ 0.79 mm 0.70 mm
(0.0303 ∼ 0.0311 in.) (0.028 in.)
Second 0.77 ∼ 0.79 m m 0.70 mm
(0.0303 ∼ 0.0311 in.) (0.028 in.)
Piston ring end gap: Top 0.20 ∼ 0.30 mm 0.6 mm
(0.0079 ∼ 0.0118 in.) (0.024 in.)
Second 0.35 ∼ 0.50 m m 0.8 mm
(0.0138 ∼ 0.0197 in.) (0.031 in.)
