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Jeep Grand Cherokee WJ. Manual - part 343

DESCRIPTION

SPECIFICATION

Lead Cylinder

#1 Left Bank

Firing Order

1-8-4-3-6-5-7-2

CYLINDER BLOCK

Cylinder Block

Cast Iron

Bore Diameter

93.010

.0075 mm

(3.6619

0.0003 in.)

Out of Round (MAX)

0.076 mm (0.003 in.)

Taper (MAX)

0.051 mm (0.002 in.)

PISTONS

Material

Aluminum Alloy

Diameter

92.975 mm (3.6605 in.)

Weight

367.5 grams (12.96 oz)

Ring Groove Diameter

No. 1

83.73 - 83.97 mm

(3.296 - 3.269 in.)

No. 2

82.833 - 83.033 mm

(3.261 - 3.310 in.)

No. 3

83.88 - 84.08 mm

(3.302 - 3.310 in.)

PISTON PINS

Type

Pressed Fit

Clearance In Piston

0.010 - 0.019 mm

(0.0004 - 0.0008 in.)

Diameter

24.013 - 24.016 mm

(0.9454 - 0.9456 in.)

PISTON RINGS

Ring Gap

Top Compression Ring

0.37 - 0.63 mm

(0.0146 - 0.0249 in.)

Second Compression

Ring

0.37 - 0.63 mm

(0.0146 - 0.0249 in.)

Oil Control (Steel Rails)

0.25 - 0.76 mm

(0.0099 - 0.30 in.)

Side Clearance

Top Compression Ring

.051 -.094 mm

(0.0020 - 0.0037 in.)

Second Compression

Ring

0.040 - 0.080 mm

(0.0016 - 0.0031 in.)

DESCRIPTION

SPECIFICATION

Oil Ring (Steel Ring)

.019 -.229 mm

(.0007 -.0091 in.)

Ring Width

Top Compression Ring

1.472 - 1.490 mm

(0.057 - 0.058 in.)

Second Compression

Ring

1.472 - 1.490 mm

(0.057 - 0.058 in.)

Oil Ring (Steel Rails)

0.445 - 0.470 mm

(0.017 - 0.018 in.)

CONNECTING RODS

Bearing Clearance

0.010 - 0.048 mm

(0.0004 - 0.0019 in.)

Side Clearance

0.10 - 0.35 mm

(0.004 - 0.0138 in.)

Piston Pin Bore Diameter

.022 -.045 mm

(Interference Fit)

(0.0009 - 0.0018 in.)

Bearing Bore Out of

Round

0.004 mm

(MAX)

(0.0002 in.)

Total Weight (Less

Bearing)

578 grams (20.388

ounces)

CRANKSHAFT

Main BearingJournal

Diameter

63.488 - 63.512 mm

(2.4996 - 2.5005 in.)

Bearing Clearance

0.004 - 0.032 mm

(0.0002 - 0.0013 in.)

Out of Round (MAX)

0.005 mm (0.0002 in.)

Taper (MAX)

0.008 mm (0.0004 in.)

End Play

0.052 - 0.282 mm

(0.0021 - 0.0112 in.)

End Play (MAX)

0.282 mm (0.0112 in)

Connecting Rod

Journal

Diameter

50.992 - 51.008 mm

(2.0076 - 2.0082 in.)

Bearing Clearance

0.010 - 0.048 mm

(0.0004 -0.0019 in.)

Out of Round (MAX)

0.005 mm (0.0002 in.)

Taper (MAX)

0.008 mm (0.0004 in.)

9 - 138

4.7L ENGINE

SPECIFICATIONS (Continued)

DESCRIPTION

SPECIFICATION

CAMSHAFT

Bore Diameter

26.02 - 26.04 mm

(1.0245 - 1.0252 in.)

Bearing Journal Diameter

25.975 - 25.995 mm

(1.0227 - 1.0235 in.)

Bearing Clearance

0.025 - 0.065 mm

(0.001 - 0.0026 in.)

Bearing Clearance (MAX)

0.065 mm (0.0026 in.)

End Play

.075 -.200 mm

(0.003 - 0.0079 in.)

End Play (MAX)

.200 mm (0.0079 in.)

VALVE TIMING

Intake

Opens (ATDC)

3.6°

Closes (ATDC)

247.1°

Duration

243.5°

Exhaust

Opens (BTDC)

232.5°

Closes (ATDC)

21.2°

Duration

253.70°

Valve Overlap

17.6°

VALVES

Face Angle

45° - 45.5°

Head Diameter

Intake

48.52 - 48.78 mm

(1.9103 - 1.9205 in.)

Exhaust

36.87 - 37.13 mm

1.4516 - 1.4618 in.)

Length (Overall)

Intake

113.45 - 114.21 mm

(4.4666 - 4.4965)

Exhaust

114.92 - 115.68 mm

(4.5244 - 4.5543 in.)

Stem Diameter

Intake

6.931 - 6.957 mm

(0.2729 - 0.2739 in.)

Exhaust

6.902 - 6.928 mm

(0.2717 - 0.2728 in.)

DESCRIPTION

SPECIFICATION

Stem - to - Guide

Clearance

Intake

.018 -.069 mm

(0.0008 - 0.0028 in.)

Exhaust

.047 -.098 mm

(0.0019 - 0.0039 in.)

Max. Allowable Stem -

to -

Guide Clearance

(Rocking

Method)

Intake

0.069 mm (0.0028 in.)

Exhaust

0.098 mm (0.0039 in.)

Valve Lift (Zero Lash)

Intake

11.25 mm (0.443 in.)

Exhaust

10.90 mm (0.4292 in.)

VALVE SPRING

Free Lenght (Approx)

Intake and Exhaust

48.6 mm (1.9134 in.)

Spring Force (Valve

Closed)

Intake and Exhaust

315.5 - 352.5 N @ 40.89
mm

(70.92722 - 79.24515lbs.
@ 1.6099 in.)

Spring Force (Valve

Open)

Intake and Exhaust

786.0 - 860.0 N @ 29.64
mm

176.6998 - 193.3357 lbs.
@ 1.167 in.)

Number of Coils

Intake and Exhaust

6.69

Wire Diameter

Intake and Exhaust

4.2799 - 4.3561 mm

(0.1685 - 0.1715 in.)

4.7L ENGINE

9 - 139

SPECIFICATIONS (Continued)

DESCRIPTION

SPECIFICATION

Installed Height
(Top of Valve Stem Seal
to Bottom of Retainer)
Nominal

Early Build

Intake

40.97 mm (1.613 in.)

Exhaust

40.81 mm (1.606 in.)

Late Build

Intake

40.11 mm (1.5792 in.)

Exhaust

40.13 mm (1.58 in.)

CYLINDER HEAD

Gasket Thickness

(Compressed)

.7 mm (0.0276 in.)

Valve Seat Angle

44.5° - 45.0°

Valve Seat Runout (MAX)

0.051 mm (0.002 in.)

Valve Seat Width

Intake

1.75 - 2.36 mm

(0.0698 - 0.0928 in.)

Exhaust

1.71 - 2.32 mm

(0.0673 - 0.0911 in.)

Guide Bore Diameter (Std.)

6.975 - 7.00 mm

(0.2747 - 0.2756 in.)

Cylinder Head Warpage

(Flatness)

0.0508 mm (0.002 in.)

OIL PUMP

Clearance Over Rotors

(MAX)

.035 -.095 mm

(0.0014 - 0.0038 in.)

Cover Out - of -Flat (MAX)

.025 mm (0.001 in.)

Inner and Outer Rotor

Thickness

12.08 mm (0.4756 in.)

Outer Rotor Clearance

(MAX)

85.96 mm (3.3843 in.)

Outer Rotor Diameter

(MIN)

85.925 mm (0.400 in.)

Tip Clearance Between

Rotors

(MAX)

.150 mm (0.006 in.)

OIL PRESSURE

At Curb Idle Speed (MIN)*

25 kPa (4 psi)

@ 3000 rpm

170 - 550 kPa (25 - 80

psi)

* CAUTION: If pressure is zero at curb idle, DO NOT
run engine at 3000 rpm.

TORQUE

DESCRIPTION

N·m

Ft.

In.

Lbs.

Camshaft

Non - Oiled Sprocket Bolt

122

—

Bearing Cap Bolts

—

100

Timing Chain Cover—Bolts

—

Connecting Rod Cap—Bolts

—

PLUS 90° TURN

Bed Plate—Bolts

Refer to Procedure

Crankshaft Damper—Bolt

175

130

—

Cylinder Head—Bolts

M11 Bolts

STEP 1

—

STEP 2

—

STEP 3

PLUS 90° TURN

M8 Bolts

STEP 1

—

STEP 2*

*(To be done with step 3 of

the M11 Bolts)

—

Cylinder Head Cover—Bolts

—

105

Exhaust Manifold—Bolts

—

Exhaust Manifold Heat
Shield—Nuts

—

Then loosen 45°

Flexplate—Bolts

—

Engine Mount Bracket to
Block—Bolts

—

Rear Mount to
Transmission—Bolts

—

Generator Mounting—Bolts

M10 Bolts

—

M8 Bolts

—

250

Intake Manifold—Bolts

—

105

Refer to Procedure

for

Tightening Sequence

Oil Pan—Bolts

—

130

Oil Pan—Drain Plug

—

Oil Pump—Bolts

—

250

Oil Pump Cover—Bolts

—

105

Oil Pickup Tube—Bolt and
Nut

—

250

9 - 140

4.7L ENGINE

SPECIFICATIONS (Continued)

2000 WJ Service Manual
Publication No. 81-370-0047
TSB 26-01-00

January, 2000

DESCRIPTION

N·m

Ft.

In.

Lbs.

Oil Dipstick Tube—Bolt

—

250

Oil Fill Tube—Bolts

—

105

Timing Chain Guide—Bolts

—

250

Timing Chain Tensioner
Arm—Special

Pin Bolt

—

150

Hydraulic Tensioner—Bolts

—

250

Timing Chain Primary
Tensioner—Bolts

—

250

Timing Drive Idler Sprocket—
Bolt

—

Thermostat Housing—Bolts

—

105

Water Pump—Bolts

—

SPECIAL TOOLS

4.7L ENGINE

Spanner Wrench 6958

Adapter Pins 8346

Engine Lift Fixture 8347

Front Crankshaft Seal Remover 8511

Front Crankshaft Seal Installer 8348

Handle C-4171

4.7L ENGINE

9 - 141

SPECIFICATIONS (Continued)

Content .. 341 342 343 344 ..