General Description

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: Specifications show the expected minimum or maximum condition.

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 information, steps and procedures may not be specific to your engine.

This is general procedures and diagnosis and testing of the engine system, except for exhaust emission control devices, which are covered in Computers and Control Systems.

The engine incorporates these features:
^ Crankcase ventilation or breather system
^ Exhaust emission control system
^ Evaporative emission control system

Some engines incorporate a fail-safe cooling system.

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.

For complete vehicle and engine identification codes, refer to Vehicle/Application and ID.