JAC S5 User Manual

S5 Workshop Manual Engine
EM-1
Engine
EM Engine Structure
Precautions
Precaution for Draining Engine Coolant:
■ Drain engine coolant after the engine is in cooling condition.
Precautions for Disconnecting Fuel Pipe:
■ Before starting to work, make sure there is no article which may cause combustion
or spark in working area.
■ Before disconnecting and dismantling, first release fuel pressure. For methods to
release fuel pressure, please refer to "the release of fuel pressure in fuel pipe".
■ After disconnecting pipe, plug the opening to avoid fuel leakage.
Precaution of Dismantling and Disassembly:
■ If it is required to use special repair tools, please use special repair tools. Always
keep safe operation, and do not force to do or conduct improper operation.
■ Be careful not to damage the matching surface or sliding surface.
■ If necessary, use adhesive tape or equivalent to seal the opening of engine system,
to avoid foreign matters from entering.
■ Methodically mark and arrange the dismantled parts, to facilitate troubleshooting
and re-assembly.
■ The basic principles for loosening bolts and nuts are to loosen the exterior first, and
then loosen the diagonal position, and so on. If the loosening sequence is specified,
please follow the specified sequence.
Precaution of Inspection, Repair and Replacement:
■ Before repairing or replacing, completely inspect parts. Use the same methods to
inspect the replaced parts. If necessary, please replace.
Precaution of Assembly and Installation:
■ The basic principles for tightening bolts and nuts are to first tighten middle with the
same tightening torque, and then tighten exterior diagonal position. If the tightening
sequence is specified, please follow the specified sequence.
■ Cushion, oil seal or rubber sealing ring are easy to be damaged during dismantling.
If necessary, replace them.
■ Completely flush, clean and blow each part to dry condition. Carefully inspect
whether engine oil or engine coolant pipe is blocked.
■ When refilling engine coolant after drain it out, it is necessary to release air from
pipe.
■ After repairing, start the engine and increase engine rotation speed to inspect
whether the engine coolant, fuel, engine oil and tail gas have leakage.
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JAC S5 Specifications

General

Brand	JAC
Model	S5
Category	Automobile
Language	English

Summary

EM Engine Structure Precautions

General Safety Precautions

Covers coolant draining, fuel pipe disconnection, dismantling, repair, and assembly safety guidelines.

Specified Angle Tightening and Sealant Procedures

Parts Tightened by Angle

Lists engine parts requiring angle tightening and torque value application.

Sealant Dismantling and Application

Procedures for removing and applying sealant to mating surfaces.

Engine Preparation Work

Special Tool Table

List of special tools required for engine preparation and servicing tasks.

Engine Structure Overview

External View and Application

Shows the external view of the engine assembly and its vehicle application.

Engine Specification Parameters

Technical Data Table

Details engine model, dimensions, displacement, power, and other technical specs.

Drive Belt System Servicing

Inspection and Dismantling

Steps for inspecting and removing drive belts and related components.

Installation Procedures

Steps for installing drive belts and adjusting tension.

Air Filter and Air Pipe Servicing

Component Location and Dismantling

Diagram shows component positions; outlines dismantling steps for air filter and pipe.

Installation and Notes

Steps for installing air filter and pipe, with important notes.

Air Filter Element Servicing

Dismantling and Inspection

Procedures for removing and inspecting the air filter element.

Installation Procedure

Steps for installing the air filter element.

Engine Cylinder Block Servicing

Component Identification and Dismantling

Diagram identifies cylinder block parts; outlines dismantling steps.

Inspection Procedures

Detailed inspection steps for the cylinder block, including bore measurement.

Camshaft Assembly Servicing

Component Identification and Dismantling

Diagram identifies camshaft parts; outlines dismantling steps.

Connecting Rod Assembly Servicing

Component Identification and Dismantling

Diagram identifies connecting rod parts; outlines dismantling steps.

Crankshaft Assembly Servicing

Component Identification and Dismantling

Diagram identifies crankshaft parts; outlines dismantling steps.

Air Exhaust System Inspection

Exhaust Pipe Components and Dismantling

Identifies exhaust pipe parts and outlines dismantling steps.

Turbocharger Servicing

Component Identification and Inspection

Diagram identifies turbocharger parts; outlines inspection procedures.

Air Intake Manifold Servicing

Dismantling Procedure

Steps for dismantling the air intake manifold and related components.

Intercooler Servicing

Component Identification, Dismantling, and Inspection

Identifies intercooler parts; outlines dismantling and inspection procedures.

Air Filter Servicing

Dismantling and Inspection

Procedures for dismantling and inspecting the air filter assembly.

Cylinder Head Cover Assembly

Cylinder Head Component Identification

Diagram identifies components of the cylinder head for the cover assembly.

Cylinder Head Servicing

Dismantling and Inspection Procedures

Steps for dismantling cylinder head bolts and valves, and inspecting the head.

Valve and Valve Spring Servicing

Valve and Spring Inspection

Procedures for inspecting valves, contact surfaces, and valve springs.

Valve Guide Pipe and Seat Servicing

Valve Guide Pipe and Seat Repair

Inspect and repair valve guide pipe clearance and valve seats.

Valve Race and Guide Pipe Replacement

Valve Race Replacement

Procedure for cleaning, heating, and installing new valve seat rings.

Valve Guide Pipe Replacement

Procedure for removing and installing new valve guide pipes.

Valve Guide Pipe Installation Details

Installation Notes and Procedures

Important notes and steps for installing valve oil seals, valves, and springs.

Timing Belt System Components

Component Identification Diagram

Diagram identifying all components of the timing belt system.

Timing Belt System Dismantling

Initial Dismantling Steps

Dismantle pulleys, tensioner, and timing belt with shield.

Timing Belt Re-installation Notes

Important notes for re-installing the timing belt with correct direction and alignment.

Timing Belt System Inspection

Pulley and Tensioner Inspection

Inspect chain wheels, tensioner pulley, and idler wheel for damage and play.

Auto-Tensioner Inspection

Inspect auto-tensioner for leakage, rod condition, and projection length.

Timing Belt Condition and Replacement

Auto-Tensioner Operation

Procedure for pressing and installing the auto-tensioner rod.

Timing Belt Defect Identification

Inspect belt for oil, dust, hardening, cracks, or separation.

Timing Belt System Installation

Component Installation and Alignment

Install crankshaft wheel, balance shaft, and align timing marks.

Belt Tensioning and Final Checks

Tension the belt, check timing marks, and verify belt deflection.

Engine Starting Fault Diagnosis

Troubleshooting Starting Issues

Diagnoses problems with starter, battery, ignition, fuel supply, and compression.

Engine Performance Fault Diagnosis

Troubleshooting Engine Overheating

Diagnoses causes of engine overheating, such as ignition, cooling, or belt issues.

Troubleshooting Oil Consumption

Diagnoses causes of excessive oil consumption, like worn seals or rings.

Engine Overhaul Technical Data

Engine Dimensions and Valve Timing

Provides technical specifications for engine size, bore, stroke, and valve timing.

Component Specifications

Details specifications for cylinder gasket, cam height, journals, and clearance.

Fastening Torque Specifications

Torque Table for Engine Components

Lists torque values for various engine bolts and nuts.