Introduction lubrication circuit
The pressure lubrication of the engine is accomplished by a trochid-type oil pump,This pump draws the oil through the oil strainer into the pump housing and then forces it through the full flow type oil filter into the main oil gallery,Part of the oil is supplied to all crankshaft bearings,the chain tensioner and the timing chain,Oil supplied to the crankshaft bearings is fed to the connecting rod bearings through the drilled passages in the crankshaft.Oil injected from jet holes on the connecting rods lubricates the cylinder walls and piston pins.The other part of the oil is brought to the oil gallery in the cylinder head to provide lubrication of the valve mechanism and timing chain as shown in Figure El-2.
From this gallery ,Oil holes go directly to all camshaft bearings through cam brackets.
Oil supplied through the No.2 and No.4 camshaft bearings is them fed to the rocker arm,valve and cam lobe through the oil cam tube.
Introduction Oil Pump
The oil pump is located in the bottom of the front cover attached by four bolts and driven by the oil pump drive spindle assembly which is driven by the helical gear on the crankshaft.
The oil pump assembly consists of an oil pressure regulator valve and outer and inner rotors.
The spring-loaded oil pressure regulator valve limits the oil pressure to a maximum of 5.6 kg/c㎡(80 psi) at 3,000 rpm.
2.drain engine oil.
3.remove oil pump lody with drive spindle assembly.
1.before installing oil pump in engine,turn crankshaft so that No.1 piston is at T.D.C
2.fill pump housing with engine oil,then align punch mark of drive spindle with hole in oil pump as shown in Figure EL-3.
3.using a new gasket,install oil pump and drive spindle assembly so that the projection on its top is located in an 11:25 a.m.position.at this time,the smaller bow-shape will be placed toward the front as shown in Figure EL-4
Ascertain whether the engagement is in order or not by checking the top of spindle through distributor fitting hole.
4.Tighten bolts securing oil pump to front cover.
Disassembly and assembly
1.Remove pump cover attaching blots,pump cover and oil pump gasket,and slide out pump rotors.
2.Remove regulator cap,regulator valve and spring
3.Assemble oil pump in reverse order of disassembly.
1.oil pump body
3.inner rotor and shaft
5.oil pump cover
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