Dodge Nitro. Manual - part 112

Fig. 181: Main Caps, Bolts, Main Bearing-Lower, Crankshaft, Thrust Washers, Main Bearing-
Upper & Engine Block 
Courtesy of CHRYSLER LLC 

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

12. Remove crankshaft (4) from cylinder block (7). See Fig. 181.  

INSPECTION 

CRANKSHAFT 

The crankshaft journals should be checked for excessive wear, taper and scoring. Limits of taper on any 
crankshaft journals should be held to 0.010 mm (0.0004 in.). Limits for journal roundness should be 0.008 mm 
(0.0003 in.). Journal grinding should not exceed 0.254 mm (0.010 in.) under the standard journal diameter. DO 
NOT grind thrust faces of Number 2 main bearing. DO NOT nick crank pin or bearing fillets. After grinding, 
remove rough edges from crankshaft oil holes and clean out all passages. Crank journals must be polished 
smooth 0.10 micronra. 

INSTALLATION 

CRANKSHAFT - INSTALLATION 

1 - MAIN CAPS
2 - BOLTS
3 - MAIN BEARING-LOWER
4 - CRANKSHAFT
5 - THRUST WASHERS
6 - MAIN BEARING-UPPER
7 - ENGINE BLOCK

NOTE:

Before installing crankshaft, refer to Fitting Main Bearings and Installation of 
Connecting Rod Bearings. See STANDARD PROCEDURE for Main Bearings. . 
See STANDARD PROCEDURE for Connecting Rod Bearings. 

CAUTION: With a forged steel crankshaft it is important that the final paper or cloth 

polish after any journal regrind be in the same direction as normal rotation 
in the engine.

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 182: Main Bearing Identification 
Courtesy of CHRYSLER LLC 

1. Install crankshaft upper main bearings in cylinder block. Ensure oil holes in bearings line up with oil 

holes in cylinder block. See Fig. 182. See STANDARD PROCEDURE. 

CAUTION: Main bearings are select fit. See STANDARD PROCEDURE for proper 

bearing size selection. 

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 183: Main Caps, Bolts, Main Bearing-Lower, Crankshaft, Thrust Washers, Main Bearing-
Upper & Engine Block 
Courtesy of CHRYSLER LLC 

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro