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ENGINE TOP END 3-7
Specifications
Item
Standard
Service Limit
Exhaust
0.06 - 0.14 mm
0.28 mm
(0.0024 - 0.0055 in.)
(0.0110 in.)
Valve Seating Surface Outside
Diameter:
Inlet
32.9 - 33.1 mm
-
(1.295 - 1.303 in.)
Exhaust
28.9 - 29.1 mm
-
(1.138 - 1.146 in.)
Valve Seating Surface Width
0.5 - 1.0 mm
-
(0.020 - 0.039 in.)
Valve Seat Cutting Angle
45°, 32°, 60°
-
Valve Spring Free Length:
Inner
37.25 mm (1.467 in.)
35.9 mm
(1.413 in.)
Outer
41.85 mm (1.648 in.)
40.3 mm
(1.587 in.)
Cylinder, Piston
Cylinder Inside Diameter
66.005 - 66.017 mm
66.10 mm
(2.5986 - 2.5991 in.)
(2.602 in.)
Piston Diameter
65.951 - 65.966 mm
65.81 mm
(2.5965 - 2.5971 in.)
(2.591 in.)
Piston/Cylinder Clearance
0.040 - 0.067 mm
-
(0.0016 - 0.0026 in.)
Oversize Pistons And Rings
+ 0.5 mm (0.020 in.) and
-
+ 1.0 mm (0.039 in.)
Piston Ring/Groove Clearance:
Top
0.050 - 0.080 mm
0.18 mm
(0.0020 - 0.0031 in.)
(0.0071 in.)
Second
0.030 - 0.070 mm
0.17 mm
(0.0012 - 0.0028 in.)
(0.0067 in.)
Piston Ring Groove Width:
Top
1.03 - 1.05 mm
1.13 mm
(0.0406 - 0.0413 in.)
(0.0445 in.)
Second
1.22 - 1.24 mm
1.32 mm
(0.0480 - 0.0488 in.)
(0.0520 in.)
Oil
2.01 - 2.03 mm
2.11 mm
(0.0791 - 0.0799 in.)
(0.0831 in.)
Piston Ring Thickness:
Top
0.970 - 0.985 mm
0.90 mm
(0.0382 - 0.0390 in.)
(0.0354 in.)
Second
1.17 - 1.19 mm
1.10 mm
(0.0461 - 0.0469 in.)
(0.0433 in.)

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