Simpsons SC213 - TIMING; To Verify Engine Timing; To Recheck Valve Timing

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SC213 Diesel Engines
TIMING
When the engine is timed at the factory, timing marks are
stamped on the gears.
To Verify Engine Timing
1. Turn and bring No. 1 piston to T.D.C. on its
compression stroke. The T.D.C that has been
obtained can be checked by examining the valve
position.
Now the No.1 cylinder valves are closed and No.2
cylinder valves are in overlap position.
2. With the crankshaft gear in fitted position, refit the
Idler gear ensuring the timing marks coincide as
shown.
2. Fit the camshaft gear on locating key provided on
camshaft.
Ensure the FIP is fitted properly in its position
3. Fit the fuel pump gear. This is provided with a slot
and will only go in one position.
4. Tighten all gear fasteners to specified torque
To Recheck Valve Timing
1. Turn the engine until maximum lift is obtained on
No. 2 cylinder Inlet valve.
2. Set the valve tip clearance between rocker lever and
No. 1 inlet valve to 1.2 mm (0.047 in.)
3. Now, turn the engine in the normal direction of
rotation until the No. 1 inlet valve tip clearance
reduces and push rod just tightens.
4. At this point, No. 1 piston should be at T.D.C. This can
be checked by examining the T.D.C. mark given on
the pulley is inline with pointer.
5. To set No. 1 piston to T.D.C. bring the notch mark on
the pulley in line with the pointer. The tolerance for
valve timing is plus or minus 1°.
6. When the valve timing is found to be correct, adjust
the valve tip clearance of No. 1 inlet valve to 0.15 mm
(0.006 in.)
7. The valve layout is E, I, E, I.
Fig: L.9
Fig: L.10
Fig: L.11
Fig: L.12
Inlet Valve Opens – 12° BTDC
Inlet Valve Closes – 40° ABDC
Exhaust Valve Opens – 44° BBDC
Exhaust Valve Closes – 12° ATDC
BTDC – Before Top Dead Centre
ATDC – After Top Dead Centre
ABDC – After Bottom Dead Centre
BBDC – Before Bottom Dead Centre