Dodge Nitro. Manual - part 123

Fig. 219: Removing/Installing No. 1 And No.2 Piston Rings From Piston Using Ring Expander Tool 
Courtesy of CHRYSLER LLC 

1. Remove piston and connecting rod. See REMOVAL.  

2. Remove No. 1 and No.2 piston rings from piston using a ring expander tool. See Fig. 219. 

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 220: Removing Upper Oil Control Ring Side Rail, Lower Oil Control Ring Side Rail & Oil 
Control Ring Expander 
Courtesy of CHRYSLER LLC 

3. Remove upper oil control ring side rail. See Fig. 220.  

4. Remove lower oil control ring side rail. See Fig. 220.  

5. Remove oil control ring expander. See Fig. 220

1 - TOP PISTON RING
2 - CHROME INTERMEDIATE PISTON RING
3 - MICRO-NAPIER INTERMEDIATE PISTON RING
4 - OIL CONTROL RINGS
5 - SPACER

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

INSTALLATION 

RING - PISTON 

Fig. 221: Piston Rings 
Courtesy of CHRYSLER LLC 

1. Measure clearance of piston rings to the cylinder bore and piston. See STANDARD PROCEDURE. 

The No. 1 and No. 2 piston rings have a different cross section. See 

Fig. 221

. Insure that which ever 

design No. 2 ring is installed, it is installed with manufacturers I.D. mark (dot) facing up, towards top of 
the piston. See DESCRIPTION. . See Fig. 221.

1 - TOP PISTON RING
2 - CHROME INTERMEDIATE PISTON RING
3 - MICRO-NAPIER INTERMEDIATE PISTON RING
4 - OIL CONTROL RINGS
5 - SPACER

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 222: Installing Side Rail 
Courtesy of CHRYSLER LLC 

Oil ring expander.  

Lower oil control ring side rail.  

Upper oil control ring side rail.  

No. 2 Intermediate piston ring.  

No. 1 Upper piston ring.  

2. Install the side rail by placing one end between the piston ring groove and the spacer. Hold end firmly and 

press down the portion to be installed until side rail is in position. Do not use a piston ring expander 
tool during this step. See Fig. 222. 

1 - SIDE RAIL END

CAUTION: Install piston rings in the following order:

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro