Items

Specifications

Valve Timing

Intake Valve Opening

16 ° Before TDC

Intake Valve Closing

70.5 ° After BDC

Exhaust Valve Opening

55.5 ° Before TDC

Exhaust Valve Closing

17 ° After BDC

Crank Pin

Connecting Rod Bearing Clearance (mm/in)

0.020-0.044/0.0007-0.0017

Connecting Rod Bearing Axial Clearance (mm/in)

0.16-0.342/0.006-0.0135

Crankshaft

Axial Clearance (mm/in)

0.04-0.24/0.0015-0.0094

Main Bearing Clearance - All (mm/in)

0.015-0.033/0.0006-0.0013

Spindle Collar Diameter - All (mm/in)

47.982-48/1.8891-1.8898

Top Surface Flatness (mm/in)

0.05/0.0019

Crankshaft Main Journals Roundness (mm/in)

0.003/0.0001

Crankshaft Main Journals Run Out (mm/in)

0.004/0.0002

Cylinder Head

Machined Minimal Total Height (mm/in)

115-0.05/4.53-0.0019

Overall Height (mm/in)

115 +0.05 / 4.53 +0.0019

Valve Guide Height (mm/in)

34.5/1.36

Pistons

Gap Between Piston and Cylinder (mm/in)

0.070-0.090/0.0028-0.0035

Diameter (mm/in)

78.9/3.11

Piston Pin

Gap Between Piston Pin and Piston (mm/in)

0.005-(-0.001) / 0.0002-(-0.00003)

Gap Between Piston Pin and Rod (mm/in)

0.005-0.011/0.0002-0.0004

Diameter (mm/in)

20/0.787

Length (mm/in)

50-0.2/1.969-0.0079

Piston Pin Offset - Thrust Side (mm/in)

0.6 ± 0.1/0.0236 ± 0.0039

Oil Pump

Safety Valve Opening Pressure (kPa/psi)

500/72.52

Piston Ring

Oil Ring End Gap (mm/in)

0.20-0.70/0.0079-0.0276

Engine

Engine Mechanical Systems JL4G15-D

2-827

Items

Specifications

Second Compression Ring End Gap (mm/in)

0.20-0.40/0.0079-0.0157

First Compression Ring End Gap (mm/in)

0.25-0.35/0.0098-0.0138

Sealants and Adhesives

Cylinder Head Cover Mat Sealant

Kesaixin 1596 Flat Silicone Rubber Sealants

Engine Oily Road Conce

Kesaixin 1243-Type Anaerobic Thread Locking Sealant

Oil Pan and Crankcase Mating Surface

Kesaixin 1596 Flat Silicone Rubber Sealants

Crankcase and Cylinder Block Mating Surface

Kesaixin 1596 Flat Silicone Rubber Sealants

Flywheel Bolt

Letai 204 Anaerobic Sealant

Valve System

Intake Valve Diameter (mm/in)

31/1.2

Exhaust Valve Diameter (mm/in)

26 / 1

Valve Tube Diameter (mm/in)

5.5/0.22

Valve Stem Diameter - Intake Valve (mm/in)

5.5/0.22

Valve Rod Diameter - Exhaust Valve (mm/in)

5.5/0.22

2.16.1.3  Intake  and  Exhaust  Valves  Lifter
Specifications Table

Packet No.

Thickness (mm/in)

Packet No.

Thickness (mm/in)

06

5.06(0.1992)

42

5.42(0.2134)

08

5.08(0.2000)

44

5.44(0.2142)

10

5.10(0.2008)

46

5.46(0.2150)

12

5.12(0.2016)

48

5.48(0.2157)

14

5.14(0.2024)

50

5.50(0.2165)

16

5.16(0.2031)

52

5.52(0.2173)

18

5.18(0.2039)

54

5.54(0.2181)

20

5.20(0.2047)

56

5.56(0.2189)

22

5.22(0.2055)

58

5.58(0.2197)

24

5.24(0.2063)

60

5.60(0.2205)

26

5.26(0.2071)

62

5.62(0.2213)

28

5.28(0.2079)

64

5.64(0.2220)

30

5.30(0.2087)

66

5.66(0.2236)

32

5.32(0.2094)

68

5.68(0.2236)

34

5.34(0.2102)

70

5.70(0.2252)

2-828

Engine Mechanical Systems JL4G15-D

Engine

Packet No.

Thickness (mm/in)

Packet No.

Thickness (mm/in)

36

5.36(0.2110)

72

5.72(0.2260)

38

5.38(0.2118)

74

5.74(0.2260)

40

5.40(0.2126)

 

 

Engine

Engine Mechanical Systems JL4G15-D

2-829

2.16.1.4  Intake  and  Exhaust  Valves  Lifter
Selection Table

Intake Valve Selection Table

Lifter No. and 
Thickness

Gap

2-830

Engine Mechanical Systems JL4G15-D

Engine