A - Top dead centre (TDC)
B - Bottom dead centre (BDC)
C - Injection advance
D - Valve overlap
a - Intake
b - Exhaust
c - Opening
d - Closing
Timing diagram
engine
timing specifications
timing by overhead valves and camshaft fitted
into engine block
valve arrangement vertical in-line
intake valve
- opening before TDC 14°
- closing after BDC 40°
exhaust valves
- opening before BDC 48°
- closing after TDC 12°
clearance between valves and rockers
(cold engine) mm . 0.20
valve overlap (valve balancing) 1°55’
injection advance (geometric) before TDC 16°
piston stroke as to injection advance mm 2.92
The valve opening and closing values indicated are the operating ones. With cold engine, these values apply to timing
adjustment only after correcting the clearance between valves and rockers to 0.25 mm.
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