Dodge Durango (HB). Manual - part 1024

PISTON RINGS

DESCRIPTION

SPECIFICATION

Metric

Standard

Ring Gap

Top Compression Ring

0.20 - 0.36 mm

0.0079 - 0.0142 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.

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

DESCRIPTION

SPECIFICATION

Metric

Standard

Bearing Clearance

0.006 - 0.044 mm

0.0002 - 0.0017 in.

Side Clearance

0.10 - 0.35 mm

0.004 - 0.0138 in.

Piston Pin Clearance

.015 - .028 mm

0.0006 - 0.0011 in.

Bearing Bore Out of Round (MAX)

0.004 mm

0.0002 in.

Total Weight (Less Bearing)

612 grams

21.588 ounces

CRANKSHAFT

DESCRIPTION

SPECIFICATION

Metric

Standard

Main Bearing Journal Diameter

63.488 - 63.512 mm

2.4996 - 2.5005 in.

Bearing Clearance

0.002 - 0.046 mm

0.00008 - 0.0018 in.

Out of Round (MAX)

0.005 mm

0.0002 in.

Taper (MAX)

0.006 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

57.908 - 57.892 mm

2.2798 - 2.2792 in.

Bearing Clearance

0.006 - 0.044

0.0002 - 0.0011 in.

Out of Round (MAX)

0.005 mm

0.0002 in.

Taper (MAX)

0.006 mm

0.0002 in.

HB

ENGINE - 3.7L SERVICE INFORMATION

9 - 1095

CAMSHAFT

DESCRIPTION

SPECIFICATION

Metric

Standard

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

DESCRIPTION

SPECIFICATION

Intake

Opens (BTDC)

5.6°

Closes (ATDC)

240.1°

Duration

245.7°

Exhaust

Opens (BTDC)

241.5°

Closes (ATDC)

20.1°

Duration

261.6°

Valve Overlap

25.7°

VALVES

DESCRIPTION

SPECIFICATION

Metric

Standard

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 in.

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.

Stem-to-Guide Clearance

Intake

0.018 - 0.069 mm

0.0008 - 0.0028 in.

Exhaust

0.047 - 0.098 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

12.00 mm

0.472 in.

Exhaust

12.00 mm

0.472 in.

9 - 1096

ENGINE - 3.7L SERVICE INFORMATION

HB

VALVE SPRING

DESCRIPTION

SPECIFICATION

Metric

Standard

Free Length (Approx)

Intake

48.18 mm

1.896 in.

Exhaust - w/damper

48.2 mm

1.897 in.

Spring Force (Valve Closed)

Intake

332.0 - 368.0 N @ 40.12 mm

74.63 - 82.72 lbs. @ 1.5795 in.

Exhaust - (without damper)

356 - 394 N @ 39.12 mm

80.031 - 88.57 lbs. @ 1.54 in.

Spring Force (Valve Open)

Intake

948.0 - 1038.0 N @ 28.12 mm

213.2 - 233.8 lbs. @ 1.107 in.

Exhaust - without damper

974 - 956 N @ 27.12 mm

218.8 - 215.1 lbs. @ 1.067 in.

Number of Coils

Intake

7.30

Exhaust

7.15

Wire Diameter

Intake

4.77 × 3.80mm

0.1878 × 0.1496 in.

Exhaust

4.66 × 3.72mm

0.1843 × .1464 in.

Installed Height (Spring Seat to
Bottom of Retainer)

Nominal

Intake

40.12 mm

1.579 in.

Exhaust - w/damper

40.12 mm

1.579 in.

CYLINDER HEAD

DESCRIPTION

SPECIFICATION

Metric

Standard

Gasket Thickness (Compressed)

0.7 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.

HB

ENGINE - 3.7L SERVICE INFORMATION

9 - 1097

OIL PUMP

DESCRIPTION

SPECIFICATION

Metric

Standard

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 Thickness

12.02 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 PRESSURE

SPECIFICATION

SPECIFICATION

Metric

Standard

At Curb Idle Speed (MIN)*

25 kPa

4 psi

@ 3000 rpm

170 - 758 kPa

25 - 110 psi

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

TORQUE

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Camshaft

Non - Oiled Sprocket Bolt

122

90

-

Bearing Cap Bolts

11

-

100

Counterbalance Shaft Retaining Bbolt

28

-

250

Timing Chain Cover Bolts

58

43

-

Connecting Rod Cap Bolts

27

20

-

PLUS 90° TURN

Bed Plate Bolts

Refer to Procedure

Crankshaft Damper Bolt

175

130

-

Cylinder Head Bolts

M11 Bolts

Refer To Procedure

M8 Bolts

Refer To Procedure

Cylinder Head Cover Bolts

12

-

105

Exhaust Manifold Bolts

25

18

-

Exhaust Manifold Heat Shield Nuts

8

-

72

Then loosen 45°

Flexplate Bolts

95

70

-

Engine Mount Bracket to Block Bolts

61

45

-

Rear Mount to Transmission Bolts

46

34

-

Generator Mounting Bolts

M10 Bolts

54

40

-

M8 Bolts

28

-

250

9 - 1098

ENGINE - 3.7L SERVICE INFORMATION

HB