Dodge Nitro. Manual - part 118

Fig. 200: Seal Protector, Seal & Retainer 
Courtesy of CHRYSLER LLC 

The rear crankshaft oil seal (2) and retainer (3) are molded and serviced as an assembly. This assembly also 
includes a separate rear crankshaft seal protector (1) that should not be removed before the seal is installed on 
the engine block. Once the seal protector (1) is separated from the assembly it can not be re-installed on the 
assembly or reused. 

REMOVAL 

SEAL-CRANKSHAFT OIL REAR 

1 - SEAL PROTECTOR
2 - SEAL
3 - RETAINER

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 201: Crankshaft, Rear Crankshaft Oil Seal, Rear Crankshaft Oil Seal Retainer & Engine Block 
Courtesy of CHRYSLER LLC 

1. Remove the engine oil pan. See REMOVAL.  

2. Lower the weight of the engine back onto the engine mounts.  

3. Remove transmission from vehicle.  

4. Remove the flex plate.  

5. Remove the rear crankshaft oil seal retainer bolts.  

6. Remove the crankshaft oil seal and clean all mating surfaces.  

INSTALLATION 

1 - CRANKSHAFT
2 - REAR CRANKSHAFT OIL SEAL
3 - REAR CRANKSHAFT OIL SEAL RETAINER
4 - ENGINE BLOCK

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

SEAL-CRANKSHAFT OIL REAR

1. Apply engine oil to crankshaft seal surface. 

Fig. 202: Seal Protector, Seal & Retainer 
Courtesy of CHRYSLER LLC 

2. If the seal protector (1) is missing or was accidentally dislodged, go to step 3. Otherwise, carefully 

position the oil seal retainer assembly (3), and seal protector (1) on crankshaft and push firmly into place 
on engine block (during this step, the seal protector will be pushed from the rear oil seal assembly as a 
result of installing the rear oil seal). Hand tighten the rear oil seal fasteners, and go to step 4. 

CAUTION: If a burr or scratch is present on the crankshaft edge (chamfer), clean 

surface using 400 grit sand paper to prevent seal damage during 
installation. Make sure the rear crankshaft oil seal surface is clean and free 
of any abrasive materials.

NOTE:

The rear crankshaft oil seal and retainer are an assembly. DO NOT separate the 
seal protector from the rear crankshaft oil seal before installation on engine. 
Damage to the seal lip will occur if the seal protector is removed and installed 
prior to installation on engine.

1 - SEAL PROTECTOR
2 - SEAL
3 - RETAINER

NOTE:

The seal lip (2) must always uniformly curl inward toward the engine on 
the crankshaft (1).

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 203: Rear Seal Installed 
Courtesy of CHRYSLER LLC 

Fig. 204: Tapered End & Rear Crankshaft Oil Seal Assembly 
Courtesy of CHRYSLER LLC 

3. Using the chamfered seal guide from Special Tool 6926, insert the tapered end (1) into the transmission 

side of the rear crankshaft oil seal assembly (2), and push the seal guide through the seal assembly. This 
will ensure the seal lip is positioned toward the engine when the seal assembly is installed. When the seal 
lip is correctly positioned, go to step 2. 

CAUTION: If for any reason the installation sleeve is missing or dislodged from 

rear crankshaft oil seal prior to installation, the following procedure 
must be performed.

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro