INSPECT INJECTION TIMING
Using a mirror, check that the matchmarks of the injection pump flange and the timing gear case are aligned.
ADJUST INJECTION TIMING
Loosen the following nuts and bolts.
Bolt holding the injection pump to the injection pump stay.
2 nuts holding the injection pump to the timing gear case.
Align the matchmark by slightly tilting the injection pump.
Tighten the following nuts and bolts.
2 nuts holding the injection pump to the timing gear case.
Bolt holding the injection pump to the injection pump stay.
INSPECT ENGINE IDLE SPEED
Warm up the engine.
When using the intelligent tester:
Connect the intelligent tester to the DLC3.
Measure the idle speed.
Standard idle speed |
---|
720 to 820 rpm (A/C OFF) |
750 to 850 rpm (A/C ON) |
Tech Tips
Refer to the intelligent tester operator's manual for further details.
When not using the intelligent tester:
Using SST, connect the tachometer test probe to terminal 9 (TAC) of the DLC3.
Measure the idle speed.
Standard idle speed |
---|
720 to 820 rpm (A/C OFF) |
750 to 850 rpm (A/C ON) |
Note
Switch off all accessories.
INSPECT MAXIMUM SPEED
Start the engine.
Fully depress the accelerator pedal.
Measure the maximum speed.
Maximum speed |
---|
4,850 to 4,950 rpm |
INSPECT COMPRESSION
Tech Tips
If there is a lack of power, excessive oil consumption or poor fuel economy is suspected. Measure the compression pressure.
Warm up and stop the engine.
Remove the glow plugs Click here.
Disconnect the spill control valve connector.
Check the cylinder compression pressure.
Tech Tips
Turn the starter before measuring the compression pressure and remove the foreign objects.
Install SST (attachment) to the glow plug hole.
Connect SST (compression gauge) to the SST (attachment).
Fully open the throttle valve, and start the engine.
While cranking the engine, measure the compression pressure.
Tech Tips
Always use a fully charged battery to obtain engine revolution of 250 rpm or more.
Perform the step above for each cylinder.
Note
This measurement must be done as quickly as possible.
Standard compression pressure |
---|
3,138 kPa (32.0 kgf/cm2, 455 psi) or more |
Minimum pressure |
---|
1,961 kPa (20.0 kgf/cm2, 284 psi) |
Difference between each cylinder |
---|
490 kPa (5.0 kgf/cm2, 71 psi) or less |
If the cylinder compression in one or more cylinders is low, pour a small amount of engine oil into the cylinder through the glow plug hole. Then, repeat the step above for the cylinder with low compression.
Tech Tips
If adding oil helps the compression, the piston rings and/or cylinder bore may be worn or damaged.
If pressure stays low, a valve may be stuck or the seating may be improper, or there may be leakage past the gasket.
Remove the SST.
Reinstall the glow plugs Click here.
Reconnect the spill control valve connector.