Engine: Description and Operation

DESCRIPTION
The 3.8L engine is a 6 cylinder "V" gasoline engine. It is of the overhead valve design (cam-in-block) and operates on unleaded fuel.

AIR/FUEL SYSTEM
The fuel/air mixture needed for burning in the cylinders is provided by sequential multiport fuel injection (SFI). Six solenoid-operated fuel injectors mounted in the cylinder heads (6049) meter fuel into the air intake stream according to engine demand. The fuel induction system is mounted on an aluminum intake manifold (9424). Refer to Powertrain Management for information on the SFI system and air induction components.

CYLINDER HEAD
The cylinder head is cast aluminum.

CYLINDER BLOCK
The cylinder block is cast aluminum.

INTAKE MANIFOLD
An aluminum intake manifold is bolted to aluminum cylinder heads.

POSITIVE CRANKCASE VENTILATION (PCV)
This engine incorporates a closed-type positive crankcase ventilation (PCV) system and exhaust emission control system. All engine/emission control systems are covered in Powertrain Management. To maintain the required exhaust emission levels, the fuel system, ignition system, and engine must be kept in good operating condition and meet recommended adjustment specifications.

SERVICING
When performing tests, adjustments or service to the engine, ignition system or fuel system, it is essential to follow the proper procedures and specifications. Refer to the proper component or system. Refer to Powertrain Management for emission control or computer control information. Make sure that the following engine components are not serviceable before replacing damaged or worn engine components:
- crankshaft.
- cylinder heads
- valve guides
- exhaust valves.
- intake valve.
- camshafts.
- cylinder block.

TRANSMISSION
Available with an automatic or manual transmission.

VALVE TRAIN