Dodge Nitro. Manual - part 99

Fig. 137: Spark Plug Tube, Rocker Arm Assembly, Camshaft & Seal 
Courtesy of CHRYSLER LLC 

1 - SPARK PLUG TUBE
2 - ROCKER ARM ASSEMBLY
3 - CAMSHAFT
4 - SEAL

NOTE:

Care must be taken not to scrape or nick the camshaft journals when installing 
the camshaft into position.

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

1. Lubricate camshaft (3) bearing journals, camshaft lobes and camshaft seal (4) with clean engine oil and 

install camshaft (3) into cylinder head. See Fig. 137.  

2. Install the cylinder head. See INSTALLATION.  

COVER CYLINDER HEAD - LEFT 

REMOVAL 

CYLINDER HEAD COVER - LEFT 

Fig. 138: Removing/Installing Cylinder Head Cover 
Courtesy of CHRYSLER LLC 

1. Disconnect and isolate the negative battery cable. 

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

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

  

2. Remove the upper intake manifold from the engine. See REMOVAL.  

3. Cover lower intake manifold with a suitable cover during service.  

4. Disconnect and remove the three ignition coils.  

5. Remove the ground strap/resistor retaining bolt from the cylinder head cover.  

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

7. Completely loosen the cylinder head cover retaining bolts and remove the cylinder head cover. See Fig. 

138.  

INSTALLATION 

CYLINDER HEAD COVER - LEFT 

Fig. 139: Inspecting/Replacing Gasket And 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. 139. 

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

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 140: Installing Seals Using MD-998306 
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-998306 (1). See Fig. 140. 

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

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro