Description And Operation: Engine

CAUTION: When repairing engines, all parts must be contamination free. If contamination/foreign material is present when repairing an engine, premature engine failure can occur.

NOTE: This section contains information, steps and procedures that may not be specific to your engine.

This section covers general procedures and diagnosis and testing of the engine system, except for exhaust emission control devices, which are covered in the Introduction - Gasoline Engines .

The engine incorporates:

a closed positive crankcase ventilation (PCV) system. Refer to ENGINE EMISSION CONTROL .
an exhaust emission control system. Refer to ENGINE EMISSION CONTROL .
an evaporative emission control system. Refer to EVAPORATIVE EMISSIONS .

Some engines incorporate a fail-safe cooling system. Refer to the appropriate procedures.

The engine, fuel system, ignition system, emissions system and exhaust system all affect exhaust emission levels and must be maintained according to the maintenance schedule. Refer to the scheduled Maintenance Guide.

Correct engine identification is required to order parts. Refer to the appropriate procedures.

For complete vehicle and engine identification codes, refer to IDENTIFICATION CODES .