Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 327 / 729

YH4
GRAND
VITARA
ENGINE MECHANICAL (H25 ENGINE) 6A2-3
The oil pump is of a trochoid type, and mounted under
the crankshaft. Oil is drawn up through the oil pump
strainer and passed through the pump to the oil filter.
The filtered oil flows into 3 paths in cylinder block.
In one path, oil reaches the crankshaft journal bear-
ings. Oil from the crankshaft journal bearings is sup-
plied to the connecting rod bearings by means of in-
tersecting passages drilled in the crankshaft, and
then injected from the big end of connecting rod to lu-
bricate piston, rings, and cylinder wall. In other paths oil goes up to the cylinder heads and
lubricates valves and camshafts, etc., after passing
through the internal oilway of camshafts.
An oil relief valve is provided on the oil pump. This
valve starts relieving oil pressure when the pressure
exceeds about 430 kPa (4.3 kg / cm
2
, 61.1 psi).
ENGINE LUBRICATION