Mitsubishi 6M60-TL Service Manual page 47

• Remove all the injectors. (See Gr13A.)
• Cover the injector mounting holes with shop towels or other sim-
ilar cloth. Crank the engine using the starter. Ensure that no for-
eign matter is attached on the shop towels.
CAUTION
• If cracks or any other damage are evident in the cylinders,
this means that the coolant, engine oil or fuel, or other sub-
stances, has entered the cylinders. If this is the case, it is
extremely dangerous to crank the engine as these sub-
stances will gush out at high temperature from the injector
mounting holes. Stay away from the engine when cranking
it.
• Attach the nozzle gasket and
mounting holes. Then, connect a compression gauge to
• Crank the engine and measure the compression pressure.
• Measure the compression pressure for all the cylinders one after
another. Determine the compression pressure difference be-
tween the cylinders.
• If the compression pressure is below the limit or the cylinder-to-
cylinder pressure differences is not within the limit, pour a small
amount of engine oil into the corresponding injection nozzle
mounting hole and remeasure the compression pressure.
• If the compression pressure increases, the piston rings and
cylinder surfaces may be badly worn or otherwise damaged.
• If the compression pressure remains unchanged, there may
be seizure in the valves, the valves may be incorrectly seated
or the cylinder head gasket may be defective.
• Install the injectors. (See Gr13A.)
• Install the rocker cover and gasket. (See later pages.)
11
to one of the injection nozzle
11-11
.