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4.7L Engine - Service Information: Specifications Jeep Commander I

Mechanical 29 illustrations ~131 words

TORQUE SPECIFICATIONS

DESCRIPTIONN.mFt.In.
Lbs.Lbs.
Camshaft
Non - Oiled Sprocket Bolt12290
Bearing Cap Bolts11100
Timing Chain Cover Bolts5843
Connecting Rod Cap Bolts2720
PLUS 90° TURN
Bed Plate BoltsRefer to INSTALLATION .
Cylinder Head BoltsRefer to INSTALLATION for left cylinder head or INSTALLATION for right cylinder head.
Crankshaft Damper Bolt175130
Cylinder Head Cover Bolts12105
Exhaust Manifold Bolts2518
Exhaust Manifold Heat Shield Nuts872
Then loosen 45°
Flexplate Bolts6045
Engine Mount Bracket to Block Bolts6145
Rear Mount to Transmission Bolts4634
Generator Mounting Bolts
M10 Bolts5440
M8 Bolts28250
Intake Manifold Bolts12105
Refer to INSTALLATION .
Tightening Sequence
Oil Pan Bolts15130
Oil Pan Drain Plug3425
Oil Pump Bolts28250
Oil Pump Cover Bolts12105
Oil Pickup Tube Bolt and Nut28250
Oil Dipstick Tube to Engine
Block Bolt15130
Oil Fill Tube Bolts12105
Timing Chain Guide Bolts28250
Timing Chain Tensioner Arm28250
Hydraulic Tensioner Bolts28250
Timing Chain Primary Tensioner Bolts28250
Timing Drive Idler Sprocket Bolt3425
Thermostat Housing Bolts13115
Water Pump Bolts(1)
(1) For appropriate bolt tightening specification, refer to FASTENER IDENTIFICATION .
(1)For appropriate bolt tightening specification, refer to FASTENER IDENTIFICATION .

TORQUE SPECIFICATIONS

DESCRIPTIONSPECIFICATION
Engine Type90° SOHC V-8 16-Valve
Displacement4.7 Liters / 4701 cc
287 (Cubic Inches)
Bore93.0 mm (3.66 in.)
Stroke86.5 mm (3.40 in.)
Compression Ratio9.0:1
Max. Variation Between Cylinders25%
Horsepower235 BHP @ 4800 RPM
Torque295 LB-FT @ 3200 RPM
Lead Cylinder#1 Left Bank
Firing Order1-8-4-3-6-5-7-2

GENERAL DESCRIPTION

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter93.010 ±.0075 mm3.6619 ± 0.0003 in.
Out of Round (MAX)0.076 mm0.003 in.
Taper (MAX)0.051 mm0.002 in.

CYLINDER BLOCK

DESCRIPTIONSPECIFICATION
MetricStandard
Diameter92.975 mm3.6605 in.
Weight366 grams12.9 oz
Ring Groove Diameter
No. 183.37 - 83.13 mm3.282 - 3.273 in
No. 282.833 - 83.033 mm3.261 - 3.310 in.
No. 383.88 - 84.08 mm3.302 - 3.310 in.

PISTONS

DESCRIPTIONSPECIFICATION
MetricStandard
Clearance In Piston0.010 - 0.019 mm0.0004 - 0.0008 in.
Diameter24.013 - 24.016 mm0.9454 - 0.9455 in.

PISTON PINS

DESCRIPTIONSPECIFICATION
MetricStandard
Ring Gap
Top Compression Ring0.20 - 0.36 mm0.0079 - 0.0142 in.
Second Compression Ring0.37 - 0.63 mm0.0146 - 0.0249 in.
Oil Control (Steel Rails)0.25 - 0.76 mm0.0099 - 0.30 in.
Side Clearance
Top Compression Ring.051 -.094 mm0.0020 - 0.0037 in.
Second Compression Ring0.040 - 0.080 mm0.0016 - 0.0031 in.
Oil Ring (Steel Ring).019 -.229 mm.0007 -.0091 in.
Ring Width
Top Compression Ring1.472 - 1.490 mm0.057 - 0.058 in.
Second Compression Ring1.472 - 1.490 mm0.057 - 0.058 in.
Oil Ring (Steel Rails)0.445 - 0.470 mm0.017 - 0.018 in.

PISTON RINGS

DESCRIPTIONSPECIFICATION
MetricStandard
Bearing Clearance0.015 - 0.055 mm0.0006 - 0.0022 in.
Side Clearance0.10 - 0.35 mm0.004 - 0.0138 in.
Piston Pin Bore Diameter.025 -.048 mm
(Interference Fit)0.001 - 0.0019 in.
Bearing Bore Out of Round (MAX)0.004 mm0.0002 in.
Total Weight (Less Bearing)555 grams19.5771 ounces

CONNECTING RODS

DESCRIPTIONSPECIFICATION
MetricStandard
Main Bearing Journal Diameter63.488 - 63.512 mm2.4996 - 2.5005 in.
Bearing Clearance0.004 - 0.034 mm0.0002 - 0.0013 in.
Out of Round (MAX)0.005 mm0.0004 in.
Taper (MAX)0.008 mm0.0004 in.
End Play0.052 - 0.282 mm0.0021 - 0.0112 in.
End Play (MAX)0.282 mm0.0112 in.
Connecting Rod Journal Diameter50.992 - 51.008 mm2.0076 - 2.0082 in.
Bearing Clearance0.010 - 0.0480.0004 - 0.0019 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.008 mm0.0004 in.

CRANKSHAFT

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter26.02 - 26.04 mm1.0245 - 1.0252 in.
Bearing Journal Diameter25.973 - 25.995 mm1.0227 - 1.0235 in.
Bearing Clearance0.025 - 0.065 mm0.001 - 0.0026 in.
Bearing Clearance (MAX)0.065 mm0.0026 in.
End Play.075 -.200 mm0.003 - 0.0079 in.
End Play (MAX).200 mm0.0079 in.

CAMSHAFT

DESCRIPTIONSPECIFICATION
Intake
Opens (BTDC)4.4°
Closes (ATDC)239.1°
Duration243.5°
Exhaust
Opens (BTDC)240.5°
Closes (ATDC)13.2°
Duration253.70°
Valve Overlap17.6°

VALVE TIMING

DESCRIPTIONSPECIFICATION
Face Angle45° - 45.5°
Head Diameter
Intake48.52 - 48.78 mm
(1.9103 - 1.9205 in.)
Exhaust36.87 - 37.13 mm
(1.4516 - 1.4618 in.)
Length (Overall)
Intake113.45 - 114.21 mm
(4.4666 - 4.4965)
Exhaust114.92 - 115.68 mm
(4.5244 - 4.5543 in.)
Stem Diameter
Intake6.931 - 6.957 mm
(0.2729 - 0.2739 in.)
Exhaust6.902 - 6.928 mm
(0.2717 - 0.2728 in.)
Stem - to - Guide Clearance
Intake0.018 - 0.069 mm
(0.0008 - 0.0028 in.)
Exhaust0.047 - 0.098 mm
(0.0019 - 0.0039 in.)
Max. Allowable Stem - to - Guide Clearance (Rocking Method)
Intake0.069 mm (0.0028 in.)
Exhaust0.098 mm (0.0039 in.)
Valve Lift (Zero Lash)
Intake11.25 mm (0.443 in.)
Exhaust10.90 mm (0.4292 in.)

VALVES

DESCRIPTIONSPECIFICATION
Free Length (Approx)
Intake49.0 mm (1.9291 in.)
Exhaust49.0 mm (1.9291 in.)
Spring Force (Valve Closed)
Intake and Exhaust313.0 - 354.0 N @ 40.12 mm (70.365 - 79.582 lbs. @ 1.5795 in.)
Spring Force (Valve Open)
Intake and Exhaust776.0 - 870.0 N @ 28.88 mm (174.451 - 195.583 lbs. @ 1.137 in.)
Number of Coils
Intake7.3
Exhaust7.3
Wire Diameter
Intake and Exhaust4.6 x 3.67 mm
(0.1811 - 0.1445 in.)
Installed Height (Spring Seat to Bottom of Retainer)
Nominal
Intake40.12 mm (1.579 in.)
Exhaust40.12 mm (1.579 in.)

VALVE SPRING

DESCRIPTIONSPECIFICATION
Gasket Thickness (Compressed)0.7 mm (0.0276 in.)
Valve Seat Angle44.5° - 45.0°
Valve Seat Runout (MAX)0.051 mm (0.002 in.)
Valve Seat Width
Intake1.75 - 2.36 mm
(0.0698 - 0.0928 in.)
Exhaust1.71 - 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.)

CYLINDER HEAD

DESCRIPTIONSPECIFICATION
Clearance Over Rotors/End Face (MAX)0.095 mm (0.0038 in.)
Cover Out - of -Flat (MAX)0.025 mm (0.001 in.)
Inner and Outer Rotor Thickness12.02 mm (0.4731 in.)
Outer Rotor to pocket (Diametral) clearance (MAX).235 mm (.0093 in.)
Outer Rotor Diameter (MIN)85.925 mm (0.400 in.)
Tip Clearance Between Rotors (MAX)0.150 mm (0.006 in.)

OIL PUMP

SPECIFICATIONSPECIFICATION
At Curb Idle Speed (MIN)*48 kPa (7 psi)
@ 3000 RPM240 - 725 kPa (35 - 105 psi)
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 RPM.

OIL PRESSURE

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PLATE-TORQUE CONVERTER DRIVE

1 - FLEXPLATE
  1. Position the flexplate onto the crankshaft and install the bolts hand tight.
  2. Tighten the flexplate retaining bolts to 60 N.m (45 ft. lbs.) in the sequence shown in illustration.
  3. Install the transmission. Refer to «INSTALLATION»(ref-288312-S16123884222008062000000) .

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