Dodge Nitro. Manual - part 6

Courtesy of CHRYSLER LLC 

24. Connect the engine wiring harness at the following points: 



Intake air temperature (IAT) sensor  



Fuel Injectors  



Electronic Throttle Control (ETC)  



Idle Air Control (IAC) Motor  



Engine Oil Pressure Switch  



Engine Coolant Temperature (ECT) Sensor  



Manifold Absolute Pressure MAP) Sensor  



Camshaft Position (CMP) Sensor  



Coil Over Plugs  



Crankshaft Position Sensor (2) 

1 - 
CRANKSHAFT 
POSITION 
SENSOR
2 - CYLINDER 
HEAD COVER
3 - 
CAMSHAFT 
POSITION 
SENSOR
4 - RIGHT 
SIDE 
CYLINDER 
BLOCK

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

Fig. 16: Removing/Installing Generator - 3.7L 
Courtesy of CHRYSLER LLC 

25. Connect lower radiator hose.  

26. Connect upper radiator hose.  

27. Connect throttle and speed control cables.  

28. Install the heater hose assembly.  

29. Install coolant recovery bottle.  

30. Install the power steering pump.  

31. Install the generator (3). Refer to INSTALLATION . 

1 - LOWER BOLTS
2 - REAR BOLT
3 - GENERATOR

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

Fig. 17: Removing/Installing A/C Compressor 
Courtesy of CHRYSLER LLC 

32. Install the A/C compressor (2).  

33. Install the drive belt. Refer to INSTALLATION .  

34. Install the fan shroud with the electric fan assembly. Refer to INSTALLATION .  

35. Install the radiator core support bracket.  

36. Install the air cleaner assembly.  

37. Refill the engine cooling system.  

38. Install the hood.  

39. Check and fill engine oil.  

40. Connect the battery negative cable.  

41. Start the engine and check for leaks.  

SPECIFICATIONS 

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

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

CYLINDER BLOCK 

PISTONS 

PISTON PINS 

PISTON RINGS 

Bore

93.0 mm

3.66 in.

Stroke

90.8 mm

3.40 in.

Horsepower

211 @ 5200 RPM

Torque

236 ft.lbs.@ 4000 RPM

Compression Pressure

1172-1551 kPa

170-225 psi

DESCRIPTION 

SPECIFICATION 

Metric 

Standard 

Bore Diameter

93.013 ± 0.0075 mm

3.6619 ± 0.0003 in.

Out of Round (MAX)

0.076 mm

0.003 in.

Taper (MAX)

0.051 mm

0.002 in.

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.

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.

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

0.051 - 0.094 mm

0.0020 - 0.0037 in.

Second Compression Ring

0.040 - 0.080 mm

0.0016 - 0.0031 in.

Oil Ring (Steel Ring)

0.019 - 0.229 mm

0.0007 - 0.0091 in.

Ring Width 

Top Compression Ring

1.472 - 1.490 mm

0.057 - 0.058 in.

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro