Intake Manifold/Supercharger Assembly

WARNING: This page is about a different variant/trim than selected.

The LT4 Roots-type supercharger is a positive displacement pump that consists of 2 counter-rotating rotors installed into the lower intake manifold housing. The rotors are designed with 4 lobes and a helical twist. The rotors of the supercharger are designed to run at a minimal clearance, not in contact with each other or the housing and are timed to each other by a pair of precision spur gears which are pressed onto the rotor shafts. The rotors are supported at each end by self-lubricating non-serviceable bearings. The drive belt pulley is pressed onto the input shaft. The input shaft is coupled to the rotor shaft. Both the belt pulley and shaft coupling are also non-serviceable.

The lower intake manifold housing has an integrated intercooler. Cooling the air enhances the effectiveness of the supercharger. The intercooler uses conventional coolant in a system that is separate from the engine cooling system. The intercooler system includes two charge air coolers/heat exchangers, a water manifold assembly, and a variety of sensors to monitor air temperature and pressure. The water manifold, located at the front of cover transfers coolant to the cover via four internal transfer tubes. The transfer tubes and water manifold are sealed with O-rings and press-in-place seals. Coolant enters the inlet port of the water manifold assembly, is directed into and through the two charge air coolers/heat exchangers, and exits back into the water manifold. Coolant then exits the water manifold outlet port returning to the separate cooling system. The two charge air coolers/heat exchangers are not serviceable

The supercharger assembly consists of the following components:

Lower Intake Manifold Housing, to include rotors, gears, bearings, shaft coupling, and drive belt pulley
Bypass Valve
Bypass Actuator
Throttle Body Assembly
Evaporative Emission Canister Purge Valve
Inlet Pressure Sensor
Manifold Air Pressure and Temperature Sensor
Overboost Control Solenoid
Water Manifold Assembly
Charge Air Coolers/Heat Exchangers
Intake Air Temperature (IAT) Sensor
Air Outlet Pressure Sensor