FAW Jiefang Automotive 485, Operation & Maintenance Manual

Page: 14 / 57

II. Main technical data
1. Valve timing
Intake valve opens 12°±2° before T.D.C.
Intake valve closes 38°±2° behind B.D.C.
Exhaust valve opens 50°±2° before B.D.C.
Exhaust valve closes 12°±2° behind T.D.C.
Valve lash (at cold state) Intake valve: 0.28-0.33 mm
Exhaust valve: 0.28-0.33 mm
T.D.C.
Intake valve opens Exhaust valve closes
Exhaust valve opens
Intake valve closes
B.D.C.
Fig. 1 Valve timing diagram
2. Fuel-supply advance angle 16
°±
1
°
before T.D.C.
3. Temperature and pressure values of the engine
(1) Exhaust temperature (
℃
)
At 15-minute rated power
≤
620
At one-hour rated power
≤
550
At 12-hour rated power
≤
500
(2) Engine-oil temperature (
℃
)
≤
95
(3) Water-out temperature (
℃
) 70
～
90, maximum.
≤
95
7