Home/Dodge/Dakota/Dodge Dakota III facelift (2007-2011)/Repair manual/Mechanical/3.7L Engine - Service Information: Application
Contents Wiring diagrams Section: Mechanical All sections

3.7L Engine - Service Information: Application Dodge Dakota III facelift

Mechanical 21 illustrations ~1341 words

SEALER APPLICATION

Mopar® Gasket Maker material should be applied sparingly 1 mm (0.040 in.) diameter or less of sealant to one gasket surface. Be certain the material surrounds each mounting hole. Excess material can easily be wiped off. Components should be torqued in place within 15 minutes. The use of a locating dowel is recommended during assembly to prevent smearing material off the location.

Mopar® Engine RTV GEN II or ATF RTV gasket material should be applied in a continuous bead approximately 3 mm (0.120 in.) in diameter. All mounting holes must be circled. For corner sealing and "T" joint locations, a 3.17 or 6.35 mm (1/8 or 1/4 in.) drop is placed in the center of the gasket contact area. Uncured sealant may be removed with a shop towel. Components should be torqued in place while the sealant is still wet to the touch (within 10 minutes). The usage of a locating dowel is recommended during assembly to prevent smearing material off the location.

Scheme 107

Scheme 107: ENGINE GASKET SURFACE PREPARATION
CAUTIONExcessive pressure and/or high RPM (beyond the recommended speed), can damage the sealing surfaces. The mild (white, 120 grit) bristle disc is recommended. If necessary, the medium (yellow, 80 grit) bristle disc may be used on cast iron surfaces with care.

To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of aluminum engine components and multi-layer steel cylinder head gaskets.

Never use the following to clean gasket surfaces

  1. Metal scraper (1).
  2. Abrasive pad or paper to clean cylinder block and head (2).
  3. High speed power tool with an abrasive pad or a wire brush (3).
  4. High speed power tool with 3M Roloc™ Bristle Disc (white or yellow) (3).

Note. Multi-Layer Steel (MLS) head gaskets require a scratch free sealing surface.

Only use the following for cleaning gasket surfaces

  1. Solvent or a commercially available gasket remover
  2. Plastic or wood scraper (4).

Scheme 108

Scheme 108: REMOVAL

Scheme 109

Scheme 109

Scheme 110

Scheme 110

Scheme 111

Scheme 111

Scheme 112

Scheme 112

Scheme 113

Scheme 113

Scheme 114

Scheme 114

Scheme 115

Scheme 115

Scheme 116

Scheme 116

Scheme 117

Scheme 117
  1. Release fuel rail pressure. Refer to «Fuel System/Fuel Delivery - Standard Procedure»(ref-352671-S16879298692010010600000) then disconnect the fuel supply quick connect fitting at the fuel rail. Refer to «Fuel System/Fuel Delivery/FITTING, Quick Connect - Standard Procedure»(ref-352671-S30005942992010010600000) .
  2. Disconnect the battery negative cable.
  3. Remove air cleaner assembly.
  4. Remove fan shroud with viscous fan assembly.
  5. Remove drive belt.
  6. Remove A/C compressor (2) and secure away from engine. 1 - LOWER BOLTS 2 - REAR BOLT 3 - GENERATOR
  7. Remove generator (3) and secure away from engine. NOTE: Do NOT remove the phenolic pulley from the P/S pump. It is not required for P/S pump removal.
  8. Remove power steering pump with lines attached and secure away from engine.
  9. Drain cooling system.
  10. Disconnect the heater hoses from the engine.
  11. Disconnect heater hoses from heater core and remove hose assembly.
  12. Disconnect throttle and speed control cables.
  13. Remove upper radiator hose from engine.
  14. Remove lower radiator hose from engine.
  15. Remove radiator/cooling module assembly.
  16. Disconnect the engine to body ground straps at the left side of cowl. 1 - THROTTLE BODY 2 - TPS 3 - IAC MOTOR 4 - IAT SENSOR (THREADED TYPE) 5 - MOUNTING SCREWS
  17. Disconnect the engine wiring harness at the following points: Intake air temperature (IAT) sensor (4) Fuel Injectors Throttle Position (TPS) Switch (2) Idle Air Control (IAC) Motor (3) Engine Oil Pressure Switch Engine Coolant Temperature (ECT) Sensor Manifold Absolute Pressure MAP) Sensor Camshaft Position (CMP) Sensor Coil Over Plugs Crankshaft Position Sensor
  18. Remove coil over plugs.
  19. Remove fuel rail and secure away from engine. NOTE: It is not necessary to release the quick connect fitting from the fuel supply line for engine removal.
  20. Remove the PCV hose.
  21. Remove the breather hoses.
  22. Remove the vacuum hose for the power brake booster.
  23. Disconnect knock sensors.
  24. Remove engine oil dipstick tube.
  25. Remove intake manifold.
  26. Install engine lifting fixture, special tool # 8427, using original fasteners from the removed intake manifold, and fuel rail. Torque to factory specifications. NOTE: Recheck bolt torque for engine lift plate before removing engine. 1 - EYELET TERMINAL 2 - NUT 3 - SCREW AND WASHER (2) 4 - STARTER MOTOR 5 - WIRE HARNESS CONNECTOR
  27. Disconnect oxygen sensor wiring.
  28. Disconnect crankshaft position sensor.
  29. Disconnect the engine block heater power cable, if equipped.
  30. Disconnect the front prop shaft at the front differential and secure out of way.
  31. Remove the pinion bracket. NOTE: It is necessary to disconnect the front propshaft for access to the starter and left side exhaust flange.
  32. Remove the starter (4). 1 - NUT 2 - A/C ACCUMULATOR 3 - GROUND STRAP
  33. Remove the ground straps from the right (1) side of the block. 1 - NUT 2 - GROUND STRAP 3 - BRAKE BOOSTER
  34. Remove the ground straps from the left (1) side of the block. 1 - BOLT 2 - BOLT 3 - BOLT
  35. Remove the structural cover.
  36. Disconnect the right and left exhaust pipes at the manifolds and from the crossover, and remove from the vehicle. 1 - TRANSMISSION 2 - DRIVEPLATE 3 - TORQUE CONVERTER BOLTS
  37. Remove torque convertor bolts (3), and mark location for reassembly. 1 - ENGINE 2 - TRANSMISSION 3 - BOLTS 4 - WIRING HARNESS CLIPS
  38. Remove transmission bellhousing to engine bolts (3).
  39. Remove left and right engine mount through bolts (3).
  40. Lower the vehicle.
  41. Support the transmission with a suitable jack.
  42. Connect a suitable engine hoist to the engine lift plate.
  43. Remove engine from vehicle.

Scheme 118

Scheme 118: ENGINE
1 - ENGINE
2 - TRANSMISSION
3 - BOLTS
4 - WIRING HARNESS CLIPS

Scheme 119

Scheme 119

Scheme 120

Scheme 120

Scheme 121

Scheme 121

Scheme 122

Scheme 122

Scheme 123

Scheme 123

Scheme 124

Scheme 124

Scheme 125

Scheme 125

Scheme 126

Scheme 126

Scheme 127

Scheme 127
  1. Position the engine in the vehicle.
  2. Install the transmission bellhousing to engine mounting bolts (3). Tighten the bolts to 41 N.m (30 ft. lbs.)
  3. Install the engine mount through bolts. 1 - TRANSMISSION 2 - DRIVEPLATE 3 - TORQUE CONVERTER BOLTS
  4. Install the torque convertor bolts (3). 1 - EYELET TERMINAL 2 - NUT 3 - SCREW AND WASHER (2) 4 - STARTER MOTOR 5 - WIRE HARNESS CONNECTOR
  5. Install the starter (4).
  6. Connect the crankshaft position sensor.
  7. Install the engine block heater power cable, if equipped. 1 - BOLT 2 - BOLT 3 - BOLT CAUTION: The structural cover requires a specific torque sequence. Failure to follow this sequence may cause severe damage to the cover.
  8. Install the structural cover.
  9. Install the pinion bracket.
  10. Install the left and right exhaust pipes.
  11. Connect the left and right oxygen sensors.
  12. Remove the engine lift plate.
  13. Connect the knock sensors.
  14. Connect the engine to body ground straps at the left side of the cowl.
  15. Install the intake manifold using the sequence provided.
  16. Install the engine oil dipstick tube.
  17. Install the power brake booster vacuum hose.
  18. Install the breather hoses.
  19. Install the PCV hose.
  20. Install the fuel rail.
  21. Install the coil over plugs. 1 - THROTTLE BODY 2 - TPS 3 - IAC MOTOR 4 - IAT SENSOR (THREADED TYPE) 5 - MOUNTING SCREWS
  22. Connect the engine wiring harness at the following points: 1 - NUT 2 - A/C ACCUMULATOR 3 - GROUND STRAP Intake air temperature (IAT) sensor (4) Fuel Injectors Throttle Position (TPS) Switch (2) Idle Air Control (IAC) Motor (3) Engine Oil Pressure Switch Engine Coolant Temperature (ECT) Sensor Manifold Absolute Pressure MAP) Sensor Camshaft Position (CMP) Sensor Coil Over Plugs Crankshaft Position Sensor
  23. Connect the ground straps on the right (3) side of the engine. 1 - NUT 2 - GROUND STRAP 3 - BRAKE BOOSTER
  24. Connect the ground straps on the left (2) side of the engine. 1 - LOWER BOLTS 2 - REAR BOLT 3 - GENERATOR
  25. Reinstall the radiator/cooling module assembly.
  26. Connect lower radiator hose.
  27. Connect upper radiator hose.
  28. Connect throttle and speed control cables.
  29. Install the heater hose assembly.
  30. Install coolant recovery bottle.
  31. Install the power steering pump.
  32. Install the generator (3).
  33. Install the A/C compressor (2).
  34. Install the drive belt.
  35. Install the fan shroud with the viscous fan assembly.
  36. Install the radiator core support bracket.
  37. Recharge the A/C system. Refer to «Heating and Air Conditioning/Plumbing - Standard Procedure»(ref-352632-S34386494402010010600000) .
  38. Install the air cleaner assembly.
  39. Refill the engine cooling system.
  40. Check and fill engine oil.
  41. Connect the battery negative cable.
  42. Start the engine and check for leaks.
DESCRIPTIONSPECIFICATION
Type90° SOHC V6 12 Valve
Number of Cylinders6
Firing Order1-6-5-4-3-2
Lead CylinderNo. 1 Left Bank
Compression Ratio9.6:1
Max. Variation Between Cylinders25%
MetricStandard
Displacement3.7 Liters226 Cubic Inches
Bore93.0 mm3.66 in.
Stroke90.8 mm3.40 in.
Horsepower211 @ 5200 RPM
Torque236 ft. lbs.@ 4000 RPM
Compression Pressure1172-1551 kPa170-225 psi

GENERAL SPECIFICATIONS

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter93.013 ± 0.0075 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.
Weight365.0 grams12.87 oz
Ring Groove Diameter
No. 185.37 - 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 Piston0.006 - 0.015 mm0.0002 - 0.0005 in.
Diameter24.017 - 24.020 mm0.9455 - 0.9456 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 Ring0.051 - 0.094 mm0.0020 - 0.0037 in.
Second Compression Ring0.040 - 0.080 mm0.0016 - 0.0031 in.
Oil Ring (Steel Ring)0.019 - 0.229 mm0.0007 - 0.0091 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 Clearance0.006 - 0.044 mm0.0002 - 0.0017 in.
Side Clearance0.10 - 0.35 mm0.004 - 0.0138 in.
Piston Pin Clearance0.015 - 0.028 mm0.0006 - 0.0011 in.
Bearing Bore Out of Round (MAX)0.004 mm0.0002 in.
Total Weight (Less Bearing)612 grams21.588 ounces

CONNECTING RODS

DESCRIPTIONSPECIFICATION
MetricStandard
Main Bearing Journal Diameter63.488 - 63.512 mm2.4996 - 2.5005 in.
Bearing Clearance0.002 - 0.046 mm0.00008 - 0.0018 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.006 mm0.0004 in.
End Play0.052 - 0.282 mm0.0021 - 0.0112 in.
End Play (MAX)0.282 mm0.0112 in.
Connecting Rod Journal Diameter57.908 - 57.892 mm2.2798 - 2.2792 in.
Bearing Clearance0.006 - 0.0440.0002 - 0.0011 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.006 mm0.0002 in.

CRANKSHAFT

DESCRIPTIONSPECIFICATION
MetricStandard
Bore Diameter26.02 - 26.04 mm1.0245 - 1.0252 in.
Bearing Journal Diameter25.975 - 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 Play0.075 -0.200 mm0.003 - 0.0079 in.
End Play (MAX)0.200 mm0.0079 in.

CAMSHAFT

DESCRIPTIONSPECIFICATION
Intake
Opens (BTDC)5.6°
Closes (ATDC)240.1°
Duration245.7°
Exhaust
Opens (BTDC)241.5°
Closes (ATDC)20.1°
Duration261.6°
Valve Overlap25.7°

VALVE TIMING

DESCRIPTIONSPECIFICATION
MetricStandard
Face Angle45° - 45.5°
Head Diameter
Intake48.52 - 48.78 mm1.9103 - 1.9205 in.
Exhaust36.87 - 37.13 mm1.4516 - 1.4618 in.
Length (Overall)
Intake113.45 - 114.21 mm4.4666 - 4.4965 in.
Exhaust114.92 - 115.68 mm4.5244 - 4.5543 in.
Stem Diameter
Intake6.931 - 6.957 mm0.2729 - 0.2739 in.
Exhaust6.902 - 6.928 mm0.2717 - 0.2728 in.
Stem-to-Guide Clearance
Intake0.018 - 0.069 mm0.0008 - 0.0028 in.
Exhaust0.047 - 0.098 mm0.0019 - 0.0039 in.
Max. Allowable Stem-to-Guide Clearance (Rocking Method)
Intake0.069 mm0.0028 in.
Exhaust0.098 mm0.0039 in.
Valve Lift (Zero Lash)
Intake12.00 mm0.472 in.
Exhaust12.00 mm0.472 in.

VALVES

DESCRIPTIONSPECIFICATION
MetricStandard
Free Length (Approx)
Intake48.18 mm1.896 in.
Exhaust - w/damper49.2 mm1.973 in.
Spring Force (Valve Closed)
Intake332.0 - 368.0 N @ 40.12 mm74.63 - 82.72 lbs. @ 1.5795 in.
Exhaust - (without damper)356 - 394 N @ 39.12 mm80.031 - 88.57 lbs. @ 1.54 in.
Spring Force (Valve Open)
Intake948.0 - 1038.0 N @ 28.12 mm213.2 - 233.8 lbs. @ 1.107 in.
Exhaust - without damper874 - 956 N @ 27.12 mm196.5 - 214.9 lbs. @ 1.067 in.
Number of Coils
Intake7.30
Exhaust7.15
Wire Diameter
Intake4.77 x 3.80 mm0.1878 x 0.1496 in.
Exhaust4.66 x 3.72 mm0.1843 x.1464 in.
Installed Height (Spring Seat to Bottom of Retainer)
Nominal
Intake40.12 mm1.579 in.
Exhaust - w/damper40.12 mm1.579 in.

VALVE SPRING

DESCRIPTIONSPECIFICATION
MetricStandard
Gasket Thickness (Compressed)0.7 mm(0.0276 in.)
Valve Seat Angle44.5° - 45.0°
Valve Seat Runout (MAX)0.051 mm0.002 in.
Valve Seat Width
Intake1.75 - 2.36 mm0.0698 - 0.0928 in.
Exhaust1.71 - 2.32 mm0.0673 - 0.0911 in.
Guide Bore Diameter (Std.)6.975 - 7.00 mm0.2747 - 0.2756 in.
Cylinder Head Warpage (Flatness)0.0508 mm0.002 in.

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)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

SPECIFICATIONSPECIFICATION
MetricStandard
At Curb Idle Speed (MIN)*25 kPa4 psi
@ 3000 RPM170 - 758 kPa25 - 110 psi
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 RPM.

OIL PRESSURE