Weichai America Corp.
Revision: August 2019 7
See engine nameplate to find engine model, series number, rated power, rated speed and
weight.
More data as following table:
3. WP04 Gas Engine Data
Item Unit Content
Engine type WP04 naturally aspirated
Number of cylinders 4
Displacement L 4.5
Cylinder bore * stroke mm 105 * 130
Compression ratio 9.75:1
Idle speed rpm 900
Fire order 1-3-4-2
Rotation CCW viewed on flywheel
Oil pressure
Idle speed KPA
≥120
Rated speed KPA 300~550
Oil temperature range (under
rated condition)
℃ 85~105
Oil capacity L 9~12
Engine coolant capacity L Engine: 5.3L; engine and radiator: 16.3L
Intake valve lash (cold) mm 0.2
Exhaust valve lash (cold) mm 0.3
Spark plug gap mm 0.3~0.35
Allow to tilt Front / back ° 5/ 5
Right / left ° 5/ 5
Weight kg 560
Size (with radiator and air filter)
(L*W*H)
mm 1433*774*1097
Note: Oil Viscosity should be determined based on Ambient Temperature Operations.
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