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