Dodge Nitro. Manual — part 100

Fig. 141: Removing/Installing Cylinder Head Cover
Courtesy of CHRYSLER LLC

3. Install cylinder head cover (1) and bolts (2). Tighten to 12 N.m (105 in. lbs.).

4. Position the wiring harness (3) on the cylinder head cover.

5. Reclip the wire harness track retaining tabs into the cover.

6. Install the ground strap/resistor retaining bolt onto the cylinder head cover.

7. Install the ignition coils (2). Tighten mounting screws to 6.7 N.m (60 in. lbs.)

8. Connect the ignition coil electrical connectors (2).

9. Install upper intake manifold. See INSTALLATION.

10. Connect negative battery cable.

COVER CYLINDER HEAD - RIGHT

REMOVAL

CYLINDER HEAD COVER - RIGHT

1 - CYLINDER HEAD COVER-LEFT SIDE
2 - BOLTS (8)

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

Fig. 142: Cylinder Head Cover Gasket & Spark Plug Tube Seals
Courtesy of CHRYSLER LLC

1. Disconnect the negative battery cable.

2. Remove the upper intake manifold. See REMOVAL.

3. Cover lower intake manifold openings during service.

4. Disconnect and remove the three ignition coils.

5. Lift up on the wire harness track retaining tabs.

6. Remove the ground strap retaining bolt from the cylinder head cover.

7. Completely loosen the cylinder head cover retaining bolts and remove the cylinder head cover (1).

INSTALLATION

CYLINDER HEAD COVER - RIGHT

1 - CYLINDER HEAD COVER GASKET
2 - SPARK PLUG TUBE SEALS

WARNING:

DO NOT START OR RUN ENGINE WITH CYLINDER HEAD COVER
REMOVED FROM THE ENGINE. DAMAGE OR PERSONAL INJURY MAY
OCCUR.

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

Fig. 143: Cylinder Head Cover Gasket & Spark Plug Tube Seals
Courtesy of CHRYSLER LLC

1. Clean cylinder head and cover mating surfaces. Inspect and replace gasket (1) and seals (2) as necessary.

See Fig. 143.

1 - CYLINDER HEAD COVER GASKET
2 - SPARK PLUG TUBE SEALS

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

Fig. 144: Installing Spark Plug Tube Seal
Courtesy of CHRYSLER LLC

2. To replace spark plug tube seals (2):



Using a suitable pry tool, carefully remove tube seals (2).



Position new seal (2) with the part number on seal facing cylinder head cover.



Install seals using MD-99830 (1).

3. Install cylinder head cover bolts and tighten to 12 N.m (105 in. lbs.).

4. Install the ground strap retaining bolt to the cylinder head cover.

5. Install the wire harness track.

6. Install the ignition coils. Tighten mounting screws to 6.7 N.m (60 in. lbs.).

7. Connect the ignition coil electrical connectors (2).

8. Install upper intake manifold. See INSTALLATION.

9. Connect negative battery cable

VALVES & SEATS -INTAKE/EXHAUST

DESCRIPTION

VALVES

Valves are made of highly heat-resistant steel and are chrome plated to prevent stem scuffing. The intake valve

1 - SPECIAL TOOL MD-998306
2 - SPARK PLUG TUBE SEAL

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro