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