And Wear Limit Data

(measured betvi valve and rocker arm)

Timing at 1 mm tappet clearance o

Intake opens 3 ATDC

Intake closes 37 ABDC

Exhaust opens 27 BBDC

Exhaust closes 5 BTDC

Intake valve stroke in TDC overlap at 0.1 mm tappet clearance 0.65 - 0.80 mm

Valve spring installation lengths

Intake valve springs Exhaust valve springs

Intake valve springs ^ 0>3mm

Ignition

Ignition Timing Adjustment (engine oil temperature at least 80° C)

Engine Type 930/50, 930/52

29 - 2° BTDC on crankshaft at 4000 rpm (vacuum hose disconnected)

Engine Type 930/51 (USA)

Engine Type 930/53 (USA)

5-3° ATDC on crankshaft at 950 - 50 rpm (vacuum hose connected)

7-2° ATDC on crankshaft at 1000 - 50 rpm (vacuum hose connected)

Engine Type 930/54 (Japan)

15 - 2° ATDC on crankshaft at 1000 - 50 rpm (vacuum hose connected)

Check ignition timing advance (ignition timing must be adjust first)

Engine Type 930/50, 930/52

0 - 4° on crankshaft at 900 + 50 rpm (vacuum hose connected)

Engine Type 930/51 (USA)

Engine Type 930/53 (USA)

Engine Type 930/54 (Japan)

Spark plugs (electrode gap in mm) SINCE 1978 MODEL, TURBO 3.3 IGNITION

Ignition Timing Adjustmen (Engine Oil Temp, at Least

Engine Type 930/60

Engine Type 930/63 (California), 930/62 (Japan) 930/65 (Japan)

Engine Type 930/66 Engine Type 930/68 (USA)

Checking ignition Timing (Ignition Timing Adjusted First)

Engine Type 930/60

Engine Type 930/61 (USA) 930/64 (USA)

Engine Type 930/63 (California) 930/62 (Japan) 930/65 (Japan)

Engine Type 930/66 Engine Type 930/68 (USA)

26 ± 3° on crankshaft before TDC at 4000 rpm (vacuum hose disconnected)

29 ± 3° on crankshaft before TDC at 4000 rpm (vacuum hose disconnected)

30 ± 3° on crankshaft before TDC at 4000 rpm (vacuum hose disconnected)

29° before TDC at 4000 rpm (vacuum hose disconnected)

10 ± 2° after TDC at 1000 ± 50 rpm (vacuum hose connected)

5 ± 1° after TDC at 1000 ± 50 rpm (vacuum hose connected)

29 ± 1° before TDC at 4000 rpm (vacuum hose disconnected)

26 ± 1° before TDC at 4000 rpm (vacuum hose - red - disconnected)

26 ± 4° before TDC at 4000 rpm (vacuum hose disconnected)

31 ± 4° before TDC at 4000 rpm (vacuum hose disconnected)

2 + 2° before TDC at 900 ± 50 rpm (vacuum hoses connected)

1 ± 2° after TDC at 900± 50 rpm (vacuum hoses connected)

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