Dodge Nitro. Manual - part 105

DISASSEMBLY 

SHAFT -ROCKER ARMS 

Fig. 158: Rocker Arms & Shaft - Disassembly 
Courtesy of CHRYSLER LLC 

1. Remove rocker arm and shafts. See REMOVAL. 

NOTE:

To prevent air ingestion into lash adjusters, avoid turning rocker arm assembly 
upside down.

CAUTION: Do not allow rocker arm assembly to rest on lash adjusters, as damage 

may occur to lash adjusters and/or plastic retainers.

1 - 4mm SCREW AND NUT
2 - 4mm SCREW AND NUT
3 - WASHER
4 - SPACER
5 - DOWEL
6 - DOWEL
7 - SPACER
8 - WASHER

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

2. Remove dowel pin using a 4 mm screw, nut, spacer, and washer installed into the pin. See Fig. 158. 

Thread the screw into the pin, then loosen the nut on the screw. This will pull the dowel out of the shaft 
support. Do not reuse dowel pins. Remove the rocker arms and pedestals in order.  

3. Check the rocker arm mounting portion of the shafts for wear or damage. Replace if damaged or heavily 

worn.  

4. Check shaft oil holes for clogging with small wire, clean as required.  

INSPECTION 

SHAFT -ROCKER ARMS 

Fig. 159: Rocker Arms & Shafts 
Courtesy of CHRYSLER LLC 

The rocker arm shafts are hollow and are used as lubrication oil ducts. The rocker arm and shaft assembly on 
the right side of the engine has an oil passage hole from the cylinder head located at the third rocker shaft 
support pedestal. The rocker arm and shaft assembly on the left side of the engine has an oil passage hole from 
the cylinder head located at the second rocker shaft support pedestal. 

The intake and exhaust rocker arms are different. They should be identified before disassembling the assembly. 

NOTE:

To prevent air ingestion into lash adjusters, avoid turning rocker arm assembly 
upside down.

CAUTION: Do not allow rocker arm assembly to rest on lash adjusters, as damage 

may occur to lash adjuster and plastic retainer.

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

See Fig. 159. 

Fig. 160: Rocker Arm Assembly 
Courtesy of CHRYSLER LLC 

1 - RETAINER
2 - SWIVEL PAD
3 - ROLLER

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Check rocker arms for wear or damage. See Fig. 160:

Roller scuffing or wear  

Shaft bore scuffing or wear  

Swivel pad on lash adjuster missing or broken  

Rocker arm showing signs of fatigue or cracking  

Roller axle protruding from arm  

Replace assembly as necessary if any rocker arms shows signs of wear. 

ASSEMBLY 

SHAFT -ROCKER ARMS 

Fig. 161: Hydraulic Lash Adjusters, Dowel Pin, Pedestal & Roller 
Courtesy of CHRYSLER LLC 

CAUTION: Do Not remove lash adjuster from rocker arm assembly. Damage to the 

adjuster and rocker arm will result.

1 - HYDRAULIC LASH ADJUSTERS
2 - DOWEL PIN
3 - PEDESTAL
4 - ROLLER

CAUTION: New dowel pins must be installed when reassembling.

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro