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
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