Description And Operation: Engine

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

NOTE: Specifications show the expected minimum or maximum condition. Refer to the appropriate Service Information for the procedure.

NOTE: If a component fails to meet the specifications, it is necessary to refinish it or install a new component. Wear limits are provided as an aid to determine if the component can be refinished. A new component must be installed when any component fails to meet specifications and cannot be refinished.

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

This article covers general procedures and diagnosis and testing of the engine system, except for exhaust emission control devices, which are covered in the appropriate INTRODUCTION- GASOLINE MODELS article.

The engine incorporates the following features:

Crankcase ventilation or breather system
Exhaust emission control system
Evaporative Emission (EVAP) control system
Refer to the appropriate Engine article for the procedure.

Some engines incorporate a fail-safe cooling system. Refer to the appropriate Engine article for the procedure.

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 MAINTENANCE SCHEDULE .

Correct engine identification is required to order parts. Refer to the appropriate Engine article for the procedure.

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