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4.7L Engine - Service Information: Specifications RAM Pickup 2500

Mechanical 12 illustrations ~839 words

SPECIFICATIONS

DESCRIPTIONSPECIFICATION
MetricStandard
Displacement4.7 Liters / 4701 cc287 Cubic Inches
Bore93.0 mm3.66 in.
Stroke86.5 mm3.40 in.
Engine Type90° SOHC V-8 16-Valve
Compression Ratio9.6:1
Max. Variation Between Cylinders25%
Horsepower303 BHP @ 5650 RPM
Torque330 LB-FT @ 3950 RPM
Lead Cylinder#1 Left Bank
Firing Order1-8-4-3-6-5-7-2

ENGINE - GENERAL

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.
No. 1 Ring Groove Diameter83.37 - 83.13 mm3.282 - 3.273 in.
No. 2 Ring Groove Diameter82.833 - 83.033 mm3.261 - 3.310 in.
No. 3 Ring Groove Diameter83.88 - 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
Top Compression Ring Gap0.20 - 0.36 mm0.0079 - 0.0142 in.
Second Compression Ring Gap0.37 - 0.63 mm0.0146 - 0.0249 in.
Oil Control (Steel Rails) Ring Gap0.25 - 0.76 mm0.0099 - 0.30 in.
Top Compression Ring Side Clearance.051 - .094 mm0.0020 - 0.0037 in.
Second Compression Ring Side Clearance0.040 - 0.080 mm0.0016 - 0.0031 in.
Oil Ring (Steel Ring) Ring Side Clearance.019 - .229 mm.0007 - .0091 in.
Top Compression Ring Width1.472 - 1.490 mm0.057 - 0.058 in.
Second Compression Ring Width1.472 - 1.490 mm0.057 - 0.058 in.
Oil Ring (Steel Rails) Ring Width0.445 - 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 (Interference Fit).025 - .048 mm0.001 - 0.0019 in.
Bearing Bore Out of Round (MAX)0.004 mm0.0002 in.
Total Weight (Less Bearing)555 grams19.5771 oz.

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

DESCRIPTIONLOCATIONSPECIFICATION
Intake Valve OpenBTDC4.4°
Intake Valve ClosedATDC239.1°
Exhaust Valve OpenBTDC240.5°
Exhaust Valve ClosedATDC13.2°
Intake Valve Duration243.5°
Exhaust Valve Duration253.70°
Valve Overlap17.6°

VALVE TIMING

DESCRIPTIONSPECIFICATION
MetricStandard
Intake Head Diameter48.52 - 48.78 mm1.9103 - 1.9205 in.
Exhaust Head Diameter36.87 - 37.13 mm1.4516 - 1.4618 in.
Intake Length (Overall)113.45 - 114.21 mm4.4666 - 4.4965
Exhaust Length (Overall)114.92 - 115.68 mm4.5244 - 4.5543 in.
Intake Stem Diameter6.931 - 6.957 mm0.2729 - 0.2739 in.
Exhaust Stem Diameter6.902 - 6.928 mm0.2717 - 0.2728 in.
Intake Stem-to-Guide Clearance0.018 - 0.069 mm0.0008 - 0.0028 in.
Exhaust Stem-to-Guide0.047 - 0.098 mm0.0019 - 0.0039 in.
Intake Maximum Stem-to-Guide Clearance (Rocking Method)0.069 mm0.0028 in.
Exhaust Maximum Stem-to-Guide Clearance (Rocking Method)0.098 mm0.0039 in.
Intake Valve Lift (Zero Lash)11.25 mm0.443 in.
Exhaust Valve Lift (Zero Lash)10.90 mm0.4292 in.
Face Angle45° - 45.5°

VALVES

DESCRIPTIONSPECIFICATION
MetricStandard
Intake Free Length (Approx)49.0 mm1.9291 in.
Exhaust Free Length (Approx)49.0 mm1.9291 in.
Intake and Exhaust Spring Force (Valve Closed)313.0 - 354.0 N @ 40.12 mm70.365 - 79.582 lbs. @ 1.5795 in.
Intake and Exhaust Spring Force (Valve Open)776.0 - 870.0 N @ 28.88 mm174.451 - 195.583 lbs. @ 1.137 in.
Intake and Exhaust Spring Wire Diameter4.6 -- 3.67mm0.1811 - 0.1445 in.
Intake and Exhaust Spring Nominal Installed Height (Spring Seat to Bottom of Retainer)40.12 mm1.579 in.
Intake and Exhaust Spring Number of Coils7.3

VALVE SPRING

DESCRIPTIONSPECIFICATION
MetricStandard
Gasket Thickness (Compressed)0.7 mm0.0276 in.
Valve Seat Runout (MAX)0.051 mm0.002 in.
Intake Valve Seat Width1.75 - 2.36 mm0.0698 - 0.0928 in.
Exhaust Valve Seat Width1.71 - 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.)
Valve Seat Angle44.5° - 45.0°

CYLINDER HEAD

DESCRIPTIONSPECIFICATION
MetricStandard
Clearance Over Rotors/End Face (MAX)0.095 mm0.0038 in.
Cover Out - of - Flat (MAX)0.025 mm0.001 in.
Inner and Outer Rotor Thickness12.02 mm0.4731 in.
Outer Rotor to pocket (Diametral) clearance (MAX)0.235 mm0.0093 in.
Outer Rotor Diameter (MIN.)85.925 mm0.400 in.
Tip Clearance Between Rotors (MAX)0.150 mm0.006 in.

OIL PUMP

DESCRIPTIONSPECIFICATION
MetricStandard
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

TORQUE SPECIFICATIONS

DESCRIPTIONN.mFt. Lbs.In. Lbs.
Camshaft Position Sensor Bolt129
Camshaft Sprocket Bolt12290
Camshaft Bearing Cap Bolts118
Timing Chain Cover Bolts5843
Connecting Rod Cap Bolts27 + 90°20 + 90°
Bed Plate BoltsRefer to CRANKSHAFT , Installation , 4.7L procedure.
Cylinder Head BoltsRefer to Cylinder Head , Installation , 4.7L Procedure.
Crankshaft Damper Bolt175130
Cylinder Head Cover Bolts129
Exhaust Manifold Bolts2518
Exhaust Manifold Heat Shield Nuts8 - 45°72 - 45°
Flexplate Bolts6045
Engine Mount Bracket to Block Bolts6145
Rear Mount to Transmission Bolts4634
Generator Mounting Bolts
M10 Bolts5440
M8 Bolts2821
Intake Manifold Bolts129
Oil Pan Bolts1511
Oil Pan Drain Plug3425
Oil Pump Bolts2821
Oil Pump Cover Bolts12105
Oil Pickup Tube Bolt and Nut28250
Block Bolt15130
Oil Fill Tube Bolts129
Timing Chain Guide Bolts2821
Timing Chain Tensioner Arm2821
Hydraulic Tensioner Bolts2821
Timing Chain Primary Tensioner Bolts2821
Timing Drive Idler Sprocket Bolt3425
Thermostat Housing Bolts1310
Water Pump Bolts5843

Scheme 147

Scheme 147: REMOVAL
Scheme 147: REMOVAL

Note. This procedure applies to both the 4X2 and 4X4 vehicles, steps that apply to the 4X4 vehicle only, are identified.

Scheme 148

Scheme 148
Scheme 148

Scheme 149

Scheme 149
Scheme 149

Scheme 150

Scheme 150
Scheme 150

Scheme 151

Scheme 151
Scheme 151

Scheme 152

Scheme 152
Scheme 152

Scheme 153

Scheme 153
Scheme 153

Scheme 154

Scheme 154
Scheme 154

Scheme 155

Scheme 155
Scheme 155

Scheme 156

Scheme 156
Scheme 156

Scheme 157

Scheme 157
Scheme 157
  1. Release fuel rail pressure then disconnect the fuel supply quick connect fitting at the fuel rail. Refer to «STANDARD PROCEDURE»(ref-457834-S04226998202012030200000) and «FITTING, QUICK CONNECT»(ref-457834-S36340154892012030200000) .
  2. Disconnect the battery negative and positive cables.
  3. Raise vehicle on hoist.
  4. Remove exhaust crossover pipe (5) from exhaust manifolds.
  5. 4X4 vehicles Disconnect axle vent tube from left side engine mount.
  6. Remove the through bolt retaining nut and bolt from both the left and right side engine mounts.
  7. 4X4 vehicles Remove locknut from left and right side engine mount brackets.
  8. Disconnect two ground straps from the lower left hand side and one ground strap from the lower right hand side of the engine.
  9. Disconnect crankshaft position sensor (1). NOTE: The following step applies to 4X4 vehicles equipped with automatic transmission only.
  10. 4X4 vehicles Remove the axle isolator bracket from the engine, transmission and the axle.
  11. Remove structural cover. Refer to «COVER, Structural Dust , Removal , 4.7L»(ref-457796-S31446606602012030200000) .
  12. Remove starter (4). Refer to «STARTER , Removal»(ref-457802-S39254669482012030200000) .
  13. Drain cooling system. Refer to «Standard Procedure»(ref-457792-S30781673372012030200000) .
  14. Remove torque converter bolts (Automatic Transmission Only).
  15. Remove transmission to engine mounting bolts.
  16. Disconnect the engine block heater power cable from the block heater, if equipped.
  17. Lower vehicle.
  18. Remove throttle body resonator assembly and air inlet hose.
  19. Disconnect throttle and speed control cables.
  20. Disconnect tube from both the left and right side crankcase breathers (1). Remove breathers.
  21. Discharge A/C system. Refer to «Plumbing , Standard Procedure»(ref-457787-S01365783702012030200000) .
  22. Remove A/C compressor (2). Refer to «COMPRESSOR, A/C , Removal»(ref-457787-S14624345472012030200000) .
  23. Remove shroud, fan assembly and accessory drive belt.
  24. Disconnect transmission oil cooler lines at the radiator.
  25. Disconnect radiator upper and lower hoses.
  26. Remove radiator, A/C condenser and transmission oil cooler. Refer to «RADIATOR, Engine Cooling , Removal»(ref-457792-S21225288992012030200000) and «CONDENSER, A/C , Removal»(ref-457787-S16872234702012030200000) .
  27. Remove generator (3). Refer to «GENERATOR , Removal»(ref-457799-S36013499732012030200000) .
  28. Disconnect the two heater hoses from the timing chain cover and heater core.
  29. Unclip (2) and remove heater hoses (1) and tubes from the intake manifold.
  30. Remove power steering pump and position out of the way.
  31. Remove intake manifold.
  32. Install Engine Lifting Fixture (special tool #10101, Fixture, Engine Lifting).
  33. Disconnect body ground strap (1) at the right side cowl.
  34. Disconnect ground strap (1) at the left side cowl. NOTE: It will be necessary to support the transmission in order to remove the engine.
  35. Position a suitable jack under the transmission.
  36. Remove engine from the vehicle.

Scheme 158

Scheme 158
Scheme 158
  1. Position engine in the vehicle.
  2. Position both the left and right side engine mount brackets and install the through bolts and nuts. Tighten nuts to 4X2 vehicles 95 N.m (70 ft. lbs.). 4X4 vehicles 102 N.m (75 ft. lbs.).
  3. 4X4 vehicles Install locknuts onto the engine mount brackets. Tighten locknuts to 41 N.m (30 ft. lbs.).
  4. Remove jack from under the transmission.
  5. Remove Engine Lifting Fixture (special tool #10101, Fixture, Engine Lifting) (1).
  6. Connect right (1) side ground straps.
  7. Connect left (1) side ground straps.
  8. Install intake manifold.
  9. Position generator wiring behind the oil dipstick tube, then install the oil dipstick tube upper mounting bolt.
  10. Install power steering pump.
  11. Connect fuel supply line quick connect fitting. Refer to «FITTING, QUICK CONNECT»(ref-457834-S36340154892012030200000) .
  12. Install generator. Refer to «GENERATOR , Installation»(ref-457799-S02313752592012030200000) .
  13. Install A/C condenser. Refer to «CONDENSER, A/C , Installation»(ref-457787-S28795394962012030200000) .
  14. Install radiator and transmission oil cooler. Refer to «RADIATOR, Engine Cooling , Installation»(ref-457792-S25692808462012030200000) .
  15. Connect radiator upper and lower hoses.
  16. Connect the transmission oil cooler lines to the radiator.
  17. Install accessory drive belt, fan assembly and shroud.
  18. Install A/C compressor (2). Refer to «COMPRESSOR, A/C , Installation»(ref-457787-S06271131602012030200000) .
  19. Install throttle body resonator assembly and air inlet hose. Tighten clamps 4 N.m (35 in. lbs.).
  20. Raise vehicle.
  21. Install transmission to engine mounting bolts. Tighten the bolts to 41 N.m (30 ft. lbs.).
  22. Install torque converter bolts (Automatic Transmission Only).
  23. Connect crankshaft position sensor (1).
  24. 4X4 vehicles Position and install the axle isolator bracket onto the axle, transmission and engine block. Tighten bolts to specification. Refer to «Specifications»(ref-457796-S29075114712012030200000) .
  25. Install starter (4). Refer to «STARTER , Installation»(ref-457802-S22328630612012030200000) . CAUTION: The structural cover requires a specific torque sequence. Failure to follow this sequence may cause severe damage to the cover.
  26. Install structural cover. Refer to «COVER, Structural Dust , Installation , 4.7L»(ref-457796-S13975014522012030200000) .
  27. Install exhaust crossover pipe (5).
  28. Install engine block heater power cable, if equipped.
  29. 4X4 vehicles Connect axle vent tube to left side engine mount.
  30. Lower vehicle.
  31. Fill engine with clean oil.
  32. Recharge the A/C system. Refer to «Plumbing , Standard Procedure»(ref-457787-S01365783702012030200000) .
  33. Refill the engine cooling system. Refer to «Standard Procedure»(ref-457792-S30781673372012030200000) .
  34. Connect the battery positive and negative cables.
  35. Start the engine and check for leaks.

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