Description And Operation: Engine

WARNING: To avoid the possibility of personal injury or damage to the vehicle, do not operate the engine with the hood open until the fan blade has been examined for possible cracks and separation.

NOTE: Specifications show the expected minimum or maximum condition. Refer to the appropriate article in Engine for the procedure.

NOTE: If a component fails to meet the specifications, it is necessary to install a new component or refinish. If the component can be refinished, wear limits are provided as an aid to making a decision. A new component must be installed for any component that fails to meet specifications and cannot be refinished.

NOTE: This article contains information, steps and procedures that may not be specific to your 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 Powertrain Control/Emissions Diagnosis article.

The engine incorporates the following features:

a closed positive crankcase ventilation (PCV) system. For additional information, refer to PCV TUBE .
an exhaust emission control system. For additional information, refer to EMISSION SYSTEMS & SUB-SYSTEMS .
an evaporative emission control system. For additional information, refer to EMISSION SYSTEMS & SUB-SYSTEMS .

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.

Correct engine identification is required to order parts.

For complete vehicle and engine identification codes, refer to FORD MOTOR CO. - INTRODUCTION .