——The air filter is equipped with a intake air temperature controller. When the temperature is low, the hot air
intake valve controlled by the temperature controller will open and the hot air, flowing by the exhaust manifold,
will be directed into the air filter from the intake preheating hose to supply more hot air and facilitate the fuel
atomization during cold winter. As temperature is high, valve is shutted off and the hot air is not permitted to
enter the air filter.
——See “CAC480M Engine’s single port injection system” to know about the throttle valve.
The exhaust system of Engine 480M includes Exhaust Manifold, Heat Insulation Cover, Exhaust Hose,
Oxygen Sensor, Flexible Hose, Three-Way Catalyst Converter, Front Muffler, Rear Muffler.
Removal and assembly of the Intake Manifold Assembly and Front lifting Lug:
1. The Intake Manifold Assembly of the Carburetor Engine.
2. Description for the Intake Manifold Assembly of Engine 480M:
The Intake Manifold Assembly includes: Water Hose, Vacuum Fitting, Water Temperature Gauge Sensor,
and Electric Heater. The water hose fitting is connected to the water hose of the throttle valve body. The left
vacuum fitting is connected to the PCV valve, and the right vacuum fitting is connected to the absolute
pressure sensor. And the vacuum fitting from the intake manifold’s branch is applied on the entire brake
system, the water temperature sensor is connected to ECU.
Fig 103 composing of intake manifold assembly of carburetor engine
Vacuum fitting (for brake boost) Absolute pressure sensor connecting
pipe connector (connect to 3 way hose)
3/8” hexagonal cone plug screw
Drainage
connector
Intake manifold
Fig.104 Composing of intake manifold assemble of electric injection engine
Vacuum fitting (for brake boost)
Vacuum fitting (for PCV valve)
Absolute pressure sensor connecting pipe connector
Install water temperature
sensor here
Intake manifold
Drainage hose
connector