F U E L S Y S T E M
CHECKING TIMING BY
FUEL FLOW METHOD
NOTE: The fuel flow method CAN NOT be used
with 3300 Series Direct Injection engines that have
21 or more degrees BTC timing.
Tools Needed:
1P540 Flow Checking Tool Group
5P6524 Engine Timing Indicator Group
9S215 Dial Indicator
9S8883 Contact Point, 12.7 mm (.50 in.) long
5P7266 Adapter
3P1565 Collet
6V2056 Rod, 130.00 mm (5.118 in.) long
6V2057 Contact Point
6V2023 Flow Checking Adapter
TM 5-3805-258-24-1
T E S T I N G
A N D
A D J U S T I N G
MEASUREMENT OF PISTON TRAVEL
1. 3P1565 Collet. 2. 9S215 Dial Indicator and 9S8883
Contact Point.
3. 5P7266 Adapter. 4. 6V2056 Rod,
130.00 mm (5.118 in.) long. 5. Cylinder head. 6. Inlet
port. 7. Piston.
The fuel flow timing method is the most ac-
curate method to check the timing of the engine.
The distance of piston (7) from top center when
inlet port (6) just closes can be determined by the
use of the procedure that follows. Use the chart
to find the conversion of dial indicator reading to
crankshaft degrees.
NOTE: The fuel system timing has a tolerance of
±1°.
4-14.1
