Dodge Nitro. Manual - part 19

The cylinder head covers. See Fig. 59 (1,2) are made of glass re-enforced thermoset plastic, and are not 
interchangeable from side-to-side. 

REMOVAL 

CYLINDER HEAD COVER 

Fig. 60: Cylinder Head Cover 
Courtesy of CHRYSLER LLC 

1. Disconnect negative cable from battery.  

2. Remove the resonator assemble and air inlet hose. 

1 - SCREWS
2 - CYLINDER HEAD COVER

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

3. Disconnect injector connectors and un-clip the injector harness.  

4. Route injector harness in front of cylinder head cover.  

5. Disconnect the left side breather tube and remove the breather tube.  

6. Remove the cylinder head cover mounting bolts (1).  

7. Remove cylinder head cover (1) and gasket. See Fig. 60.  

INSTALLATION 

CYLINDER HEAD COVER 

Fig. 61: Cylinder Head Cover 
Courtesy of CHRYSLER LLC 

NOTE:

The gasket may be used again, providing no cuts, tears, or deformation has 
occurred.

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

1. Clean cylinder head cover and both sealing surfaces. Inspect and replace gasket as necessary.  

2. Install cylinder head cover. See Fig. 61 (2).  

3. Tighten cylinder head cover bolts (1) and double ended studs to 12 N.m (105 in. lbs.).  

4. Install left side breather and connect breather tube.  

5. Connect injector electrical connectors and injector harness retaining clips.  

6. Install the resonator and air inlet hose.  

7. Connect negative cable to battery.  

VALVES & SEATS - INTAKE/EXHAUST 

DESCRIPTION 

VALVES 

The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. Each valve is 
actuated by a roller rocker arm which pivots on a stationary lash adjuster. All valves use three bead lock keepers 
to retain the springs and promote valve rotation. 

STANDARD PROCEDURE 

REFACING 

1 - SCREWS
2 - CYLINDER HEAD COVER

CAUTION: Do not use harsh cleaners to clean the cylinder head covers. Severe 

damage to covers may occur.

NOTE:

The gasket may be used again, provided no cuts, tears, or deformation has 
occurred.

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro

  

Fig. 62: Valve Assembly Configuration 
Courtesy of CHRYSLER LLC 

1 - VALVE LOCKS (3-BEAD)
2 - RETAINER
3 - VALVE STEM OIL SEAL
4 - INTAKE VALVE

 

2007 Dodge Nitro R/T 

2007 ENGINE 3.7L - Service Information - Nitro