Mitsubishi Fuso CANTER FE85DE6SLGP, Shop Manual

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11
11-15
• Disconnect the injector connector and remove all injectors.
• Cover the injector mounting holes with shop towels. After crank-
ing the engine by the starter, check that no foreign substances
are deposited on the shop towels.
• If there are deposits (such as engine oil or coolant) on the shop
towels, the following may be the cause:
• Deposits of engine oil alone can mean a defective piston ring
seal; the piston rings must be inspected.
• Deposits of both engine oil and coolant can mean cracks in
the cylinders; the crankcase must be replaced.
WARNING
• When coolant and engine oil deposits are evident, cranking
the engine could be dangerous as these substances, heat-
ed to high temperatures, will blow out from the injector
mounting holes. Make sure to stay away from the injector
mounting holes when the engine is being cranked.
• Attach the gasket and to one of the injector mounting
holes. Then, connect a compression gauge to .
• Crank the engine and measure the compression pressure for all
the cylinders one after another. Determine the compression
pressure difference between 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 injector 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 injector after inspection. (See Gr13.)