Index Jeep Jeep Grand Cherokee WK - service repair manual 2005 year

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Jeep Grand Cherokee WK. Manual - part 1208

ENGINE - 5.7L SERVICE INFORMATION

TABLE OF CONTENTS

page

page

ENGINE - 5.7L SERVICE INFORMATION

. . . . . . . . . . . . . . . . . . . . . . . 1430

DIAGNOSIS AND TESTING

DIAGNOSIS AND TESTING - ENGINE

DIAGNOSIS - INTRODUCTION . . . . . . . . . . 1430

DIAGNOSIS AND TESTING - ENGINE

DIAGNOSIS - PERFORMANCE . . . . . . . . . 1431

DIAGNOSIS AND TESTING - ENGINE

DIAGNOSIS - MECHANICAL . . . . . . . . . . . 1432

DIAGNOSIS AND TESTING - CYLINDER

COMPRESSION PRESSURE . . . . . . . . . . . 1433

DIAGNOSIS AND TESTING - CYLINDER

COMBUSTION PRESSURE LEAKAGE . . . . 1433

DIAGNOSIS AND TESTING - ENGINE

DIAGNOSIS - LUBRICATION . . . . . . . . . . . 1434

DIAGNOSIS AND TESTING - ENGINE

DIAGNOSIS - MECHANICAL . . . . . . . . . . . 1435

STANDARD PROCEDURE

STANDARD PROCEDURE - REPAIR

DAMAGED OR WORN THREADS . . . . . . . 1437

STANDARD PROCEDURE - HYDROSTATIC

LOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1437

REMOVAL - ENGINE

. . . . . . . . . . . . . . . . . . . 1438

INSTALLATION - ENGINE

. . . . . . . . . . . . . . . 1445

. . . . . . . . . . . . . . . . . . . . . . . 1453

. . . . . . . . . . . . . . . . . . . . . . . . . . 1458

. . . . . . . . . . . . . . . . . . . . . . . 1460

AIR INTAKE SYSTEM

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1463

. . . . . . . . . . . . . . . . . . . . . . . 1464

CYLINDER HEAD

OPERATION—CYLINDER HEAD

. . . . . . . . . . 1464

DIAGNOSIS AND TESTING - CYLINDER HEAD

. . . . . . . . . . . . . . . . . . . 1464

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1465

. . . . . . . . . . . . . . . . . . . . . . . . . . 1467

. . . . . . . . . . . . . . . . . . . . . . . . . 1467

. . . . . . . . . . . . . . . . . . . . . . . 1468

COVER-CYLINDER HEAD

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1472

. . . . . . . . . . . . . . . . . . . . . . . 1475

VALVES & SEATS - INTAKE/EXHAUST

DESCRIPTION - VALVE GUIDES

. . . . . . . . 1477

. . . . . . . . . . . . . . . . . . . . . . 1477

STANDARD PROCEDURE - REFACING

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1478

. . . . . . . . . . . . . . . . . . . . . . . 1478

ROCKER ARM

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1479

. . . . . . . . . . . . . . . . . . . . . . . 1481

SEALS-VALVE GUIDE

. . . . . . . . . . . . . . . . . . . . . . . 1483

SPRINGS-VALVE

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1483

. . . . . . . . . . . . . . . . . . . . . . . 1489

ENGINE BLOCK

. . . . . . . . . . . . . . . . . . . . . . . . . . 1493

. . . . . . . . . . . . . . . . . . . . . . . . . 1494

CAMSHAFT

REMOVAL - CAMSHAFT CORE

HOLE PLUG . . . . . . . . . . . . . . . . . . . . . . . . 1494

REMOVAL - CAMSHAFT

. . . . . . . . . . . . . . 1495

. . . . . . . . . . . . . . . . . . . . . . . . . 1499

INSTALLATION - CAMSHAFT CORE HOLE

PLUG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1500

INSTALLATION - CAMSHAFT

. . . . . . . . . . . 1500

CRANKSHAFT

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1505

. . . . . . . . . . . . . . . . . . . . . . . 1509

BEARINGS-CRANKSHAFT MAIN

STANDARD PROCEDURE - CRANKSHAFT

MAIN BEARING - FITTING

. . . . . . . . . . . . . 1515

. . . . . . . . . . . . . . . . . . . . . . . . . 1515

SEAL-CRANKSHAFT OIL-FRONT

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1516

. . . . . . . . . . . . . . . . . . . . . . . 1517

SEAL-CRANKSHAFT OIL-REAR

DIAGNOSIS AND TESTING - REAR SEAL

. . . . . . . . . . . . . . . . . . . . . . . 1517

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1518

. . . . . . . . . . . . . . . . . . . . . . . 1519

RETAINER-CRANK REAR OIL - SEAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1519

. . . . . . . . . . . . . . . . . . . . . . . 1520

FLEX PLATE

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1520

. . . . . . . . . . . . . . . . . . . . . . . 1521

TAPPETS-HYDRAULIC ROLLER

DIAGNOSIS AND TESTING - HYDRAULIC

. . . . . . . . . . . . . . . . . . . . . . . . . . 1521

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1522

. . . . . . . . . . . . . . . . . . . . . . . 1523

PISTON & CONNECTING ROD

. . . . . . . . . . . . . . . . . . . . . . . 1524

STANDARD PROCEDURE - PISTON

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1524

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ENGINE - 5.7L SERVICE INFORMATION

WK

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1525

. . . . . . . . . . . . . . . . . . . . . . . . . . 1526

. . . . . . . . . . . . . . . . . . . . . . . . . 1526

. . . . . . . . . . . . . . . . . . . . . . . 1527

RINGS-PISTON

STANDARD PROCEDURE - PISTON RING

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1528

DAMPER-CRANKSHAFT

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1531

. . . . . . . . . . . . . . . . . . . . . . . 1532

COVER-STRUCTURAL

. . . . . . . . . . . . . . . . . . . . . . . 1533

. . . . . . . . . . . . . . . . . . . . . . . . . 1533

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1533

. . . . . . . . . . . . . . . . . . . . . . . 1534

SOLENOID-MDS

. . . . . . . . . . . . . . . . . . . . . . . 1534

. . . . . . . . . . . . . . . . . . . . . . . . . 1534

DIAGNOSIS AND TESTING

. . . . . . . . . . . . . . 1535

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1535

. . . . . . . . . . . . . . . . . . . . . . . 1535

MOUNT - FRONT

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1536

. . . . . . . . . . . . . . . . . . . . . . . 1536

MOUNT - REAR

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1537

. . . . . . . . . . . . . . . . . . . . . . . 1538

LUBRICATION

. . . . . . . . . . . . . . . . . . . . . . . 1539

DIAGNOSIS AND TESTING

DIAGNOSIS AND TESTING - CHECKING

ENGINE OIL PRESSURE . . . . . . . . . . . . . . 1539

DIAGNOSIS AND TESTING - ENGINE OIL

LEAK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1540

OIL

STANDARD PROCEDURE - ENGINE OIL

. . . . . . . . . . . . . . . . . . . . . . . . . . 1541

FILTER-ENGINE OIL

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1541

. . . . . . . . . . . . . . . . . . . . . . . 1542

PAN-ENGINE OIL

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1542

. . . . . . . . . . . . . . . . . . . . . . . 1545

PUMP-ENGINE OIL

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1550

. . . . . . . . . . . . . . . . . . . . . . . . . . 1550

. . . . . . . . . . . . . . . . . . . . . . . . . 1551

. . . . . . . . . . . . . . . . . . . . . . . 1552

MANIFOLD - INTAKE

. . . . . . . . . . . . . . . . . . . . . . . 1553

DIAGNOSIS AND TESTING - INTAKE

MANIFOLD LEAKAGE

. . . . . . . . . . . . . . . . 1553

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1553

. . . . . . . . . . . . . . . . . . . . . . . . . . 1554

. . . . . . . . . . . . . . . . . . . . . . . . . 1554

. . . . . . . . . . . . . . . . . . . . . . . 1554

MANIFOLD - EXHAUST

. . . . . . . . . . . . . . . . . . . . . . . 1554

. . . . . . . . . . . . . . . . . . . . . . . . . 1555

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1555

. . . . . . . . . . . . . . . . . . . . . . . . . . 1556

. . . . . . . . . . . . . . . . . . . . . . . . . 1556

. . . . . . . . . . . . . . . . . . . . . . . 1556

COVER-TIMING

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1558

. . . . . . . . . . . . . . . . . . . . . . . 1560

TIMING CHAIN & SPROCKETS

. . . . . . . . . . . . . . . . . . . . . . . . . . . 1561

. . . . . . . . . . . . . . . . . . . . . . . 1564

TENSIONER - TIMING CHAIN

. . . . . . . . . . . . . . . . . . . . . . . 1567

. . . . . . . . . . . . . . . . . . . . . . . . . 1567

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ENGINE - 5.7L SERVICE INFORMATION

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ENGINE - 5.7L SERVICE INFORMATION

DESCRIPTION

The 5.7L engine (345 CID) eight-cylinder engine is a 90° V-Type lightweight, deep skirt cast iron block, aluminum
heads, single cam, overhead valve engine with hydraulic roller tappets. The heads incorporate splayed valves with
a hemispherical style combustion chamber and dual spark plugs. The cylinders are numbered from front to rear; 1,
3, 5, 7 on the left bank and 2, 4, 6, 8 on the right bank. The firing order is 1-8-4-3-6-5-7-2.

DIAGNOSIS AND TESTING

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - INTRODUCTION

Engine diagnosis is helpful in determining the causes of malfunctions not detected and remedied by routine main-
tenance.

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ENGINE - 5.7L SERVICE INFORMATION

WK

These malfunctions may be classified as either performance (e.g., engine idles rough and stalls) or mechanical
(e.g., a strange noise).

(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) - PERFORMANCE and (Refer to 9 - ENGINE - DIAGNOSIS
AND TESTING)—MECHANICAL for possible causes and corrections of malfunctions. (Refer to 14 - FUEL SYSTEM/
FUEL DELIVERY - DIAGNOSIS AND TESTING) and (Refer to 14 - FUEL SYSTEM/FUEL INJECTION - DIAGNO-
SIS AND TESTING) for the fuel system diagnosis.

Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that can not be iso-
lated with the Service Diagnosis charts. Information concerning additional tests and diagnosis is provided within the
following diagnosis:

•

Cylinder Compression Pressure Test (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

•

Cylinder Combustion Pressure Leakage Test (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

•

Engine Cylinder Head Gasket Failure Diagnosis (Refer to 9 - ENGINE/CYLINDER HEAD - DIAGNOSIS AND
TESTING).

•

Intake Manifold Leakage Diagnosis (Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANIFOLD - DIAGNOSIS
AND TESTING).

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - PERFORMANCE

CONDITION

POSSIBLE CAUSE

CORRECTION

ENGINE WILL NOT START

1. Weak battery

1. Charge or replace as necessary.

2. Corroded or loose battery
connections.

2. Clean and tighten battery
connections. Apply a coat of light
mineral grease to the terminals.

3. Faulty starter.

3. (Refer to 8 - ELECTRICAL/
STARTING - DIAGNOSIS AND
TESTING).

4. Incorrect spark plug gap.

4. (Refer to 8 - ELECTRICAL/
IGNITION CONTROL/SPARK PLUG
- CLEANING).

5. Dirt or water in fuel system.

5. Clean system and replace fuel
filter.

6. Faulty fuel pump, relay or wiring.

6. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

ENGINE STALLS OR ROUGH IDLE

1. Idle speed set to low.

1. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

2. Vacuum leak.

2. Inspect intake manifold and
vacuum hoses, repair or replace as
necessary.

3. Incorrect engine timing.

3. (Refer to 9 - ENGINE/VALVE
TIMING - STANDARD
PROCEDURE).

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ENGINE - 5.7L SERVICE INFORMATION

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