Lubrication Of Engine Components; Main Bearing And Connecting Rod Bearing - Mitsubishi 6M70 Workshop Manual

STRUCTURE AND OPERATION

8. Lubrication of Engine Components

• The engine oil in the main oil gallery lubricates the engine components in the following ways.
8.1 Mitsubishi 6M70 Main bearing and connecting rod bearing
• Engine oil supplied through an oil passage in the crankshaft lubricates the big end (connecting rod bearing) of
each connecting rod. Simultaneously, engine oil supplied through an oil passage in the connecting rod lubricates
the connecting rod's small end (connecting rod bushing). Beside, engine oil is sprayed out of the oil jet in the head
of the connecting rod into the piston to cool the piston.
8.2 Mitsubishi 6M70 Timing gears
• Engine oil in the main oil gallery is directed through the oil passages in the crankcase and cylinder head and is
used to lubricate the various gear shafts. After lubricating the gear shafts, the oil is used to lubricate the gears be-
fore returning the oil pan. Engine oil also lubricates the gears by the oil spray plugs. The oil spray plug has an ar-
row showing the installed direction on its head.
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