ENGINE
M6060, M7060, WSM
1-S47
Measuring Angular Deviation between Crankshaft TDC and
Crank Position Sensor Detected TDC
1. Remove the cylinder head cover, an injector and rocker arm.
2. Bring the piston of cylinder 4 to TDC.
3. Remove the #4 exhaust valve bridge arm and valve spring.
4. Insert a small O-ring (5) so the valve does not fall into the
cylinder.
5. Set a dial gauge (3) on the tip of the valve (4).
6. Turn the flywheel counterclockwise and measure the position
where the tip of the valve is the highest.
7. Stop the flywheel at the position where the tip of the valve is the
highest.
8. Put a tri-square (6) on the flywheel housing (7) and flywheel (8)
and draw a reference line (9).
• Do not drop the valve (4) into the cylinder.
• When measuring the highest position of the tip of the valve,
do not rotate the flywheel clockwise. If you go past the
highest point of the valve, back the flywheel up slightly and
measure the highest point of the valve.
• The reference line (9) indicates the TDC of the crankshaft.
(To be continued)
(1) TC Mark (Flywheel Housing)
(2) TC Mark (Flywheel)
(3) Dial Gauge
(4) Valve
(5) O-ring
(6) Tri-square
(7) Flywheel Housing
(8) Flywheel
(9) Reference Line
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