84
4.
The removal and assembly for the exhaust manifold, heat insulation cover and rear lifting lug:
Removal:
－
Loose and remove the M12
×
25 allen screw, and remove the rear lug .
－
Loose and remove two M8
×
12 screw and remove the heat insulation cover .
－
Loose and remove 8 M8 lock nuts and washers.
－
remove the exhaust manifold.
－
Remove the exhaust manifold sealing gasket.
－
Remove eight M8 studs of same length.
Assembly:
－
screw in 8 M8 studs of same length and tighten them with two nuts.
－
Assemble the new exhaust manifold sealing gasket.
－
Install the exhaust manifold.
14-17Nm .
－
Put the washers onto the studs and tighten lock nuts with hands, tightening torque is
14-19Nm .
－
Assemble the heat insulation cover and tighten two bolts with hands ,tightening torque is
－
install the rear lug and tighten allen screw with hands , tightening torque is 50-60Nm.
5.
For oxygen sensor and 3 way catalyst Converter, See “CAC480M Engine’s single port injection
system”
【
16
】
Positive Crankcase Ventilation
（
PCV
）
system of engine.
1.
Description for PCV system of the Carburetor engine:
PCV system is a closed system. The leaking
air of piston from the Crankcase goes to the cylinder head cover through the PCV hose. The exhaust gas
enters the intake manifold passing the 3-way pipe after throttled by the absolute pressure pipe connector.
The gas in the crankcase enter the 3 -way pipe through the guide cover to ventilate the crankcase.
The PCV system includes oil baffle assembly, PCV pipe—cylinder block, absolute pressure
transmission hose connector, 3-way connector, valve chamber cover, connecting hose, ventilation hose.
See the above for Removal and Assembly of oil baffle assembly and valve chamber cover assembly.
