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Regular Service / Maintenance This section contains discussion about regular service and maintenance (upkeep) of your Jeep Commander

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  #1  
Old 08-12-2011, 06:46 PM
costelloandrew costelloandrew is offline
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I have a 2006 cammander with a 3.7 I need to get torque specs for the head bolts please help
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Old 08-12-2011, 07:49 PM
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TORQUE

DESCRIPTION
Nm
Ft. Lbs.
In. Lbs.

Camshaft
Non - Oiled Sprocket Bolt
122
90
-

Bearing Cap Bolts
11
-
100

Counterbalance Shaft Retaining Bolt
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
-

Engine to Transmission Bellhousing Bolts
41
30
-

Rear Mount to Transmission Bolts
46
34
-

Generator Mounting Bolts
M10 Bolts
54
40
-

M8 Bolts
28
-
250

Intake Manifold Bolts
12
-
105

Refer to Procedure for Tightening Sequence

Oil Pan Bolts
15
-
130

Oil Pan Drain Plug
34
25
-

Oil Pump Bolts
28
-
250

Oil Pump Cover Bolts
12
-
105

Oil Pickup Tube Bolt and Nut
28
-
250

Oil Dipstick Tube to Engine Block Bolt
15
-
130

Oil Fill Tube Bolts
12
-
105

Timing Chain Guide Bolts
28
-
250

Timing Chain Tensioner Arm
28
-
250

Hydraulic Tensioner Bolts
28
-
250

Timing Chain Primary Tensioner Bolts
28
-
250

Timing Drive Idler Sprocket Bolt
34
25
-

Thermostat Housing Bolts
12
-
105

Water Pump Bolts
58
43
-

3.7L ENGINE

GENERAL SPECIFICATIONS DESCRIPTION
SPECIFICATION

Type
90 SOHC V6 12 Valve

Number of Cylinders
6

Firing Order
1-6-5-4-3-2

Lead Cylinder
No. 1 Left Bank

Compression Ratio
9.6:1

Max. Variation Between Cylinders
25%

Metric
Standard

Displacement
3.7 Liters
226 Cubic Inches

Bore
93.0 mm
3.66 in.

Stroke
90.8 mm
3.40 in.

Horsepower
211 @ 5200 RPM

Torque
236ft. lbs.@4000 PRM

Compression Pressure
1172-1551 kPa
170-225 psi



CYLINDER BLOCK DESCRIPTION
SPECIFICATION

Metric
Standard

Bore Diameter
93.013 .0075 mm
3.6619 0.0003 in.

Out of Round (MAX)
0.076 mm
0.003 in.

Taper (MAX)
0.051 mm
0.002 in.



PISTONS DESCRIPTION
SPECIFICATION

Metric
Standard

Diameter
92.975 mm
3.6605 in.

Weight
365.0 grams
12.87 oz

Ring Groove Diameter

No. 1
85.37 - 83.13 mm
3.282 - 3.273 in

No. 2
82.833 - 83.033 mm
3.261 - 3.310 in.

No. 3
83.88 - 84.08 mm
3.302 - 3.310 in.



PISTON PINS DESCRIPTION
SPECIFICATION

Metric
Standard

Clearance In Piston
0.006 - 0.015 mm
0.0002 - 0.0005 in.

Diameter
24.017 - 24.020 mm
0.9455 - 0.9456 in.



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.



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.



VALVE SPRING DESCRIPTION
SPECIFICATION

Metric
Standard

Free Length (Approx)

Intake
48.18 mm
1.896 in.

Exhaust - w/damper
49.2 mm
1.973 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
874 - 956 N @ 27.12 mm
196.5 - 214.9 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.



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.
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