Dodge Nitro. Manual — part 114

Fig. 186: Main Bearing Cap Identification
Courtesy of CHRYSLER LLC

12. Install the main cap tie (horizontal) bolts and tighten to 28 N.m (250 in. lbs.). See Fig. 186.

13. Install rear crankshaft oil seal retainer and oil seal (Refer to INSTALLATION )

14. Install oil pump assembly. See INSTALLATION.

15. Install dowel pin in crankshaft. See INSTALLATION.

16. Install crankshaft sprocket. See INSTALLATION.

17. Install timing belt and tensioner. See INSTALLATION.

18. Install front timing belt cover. See INSTALLATION.

19. Install oil pickup tube and tighten bolt to 28 N.m (250 in. lbs.).

20. Install oil pan. See INSTALLATION.

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

21. Install engine assembly. See INSTALLATION.

22. Fill engine crankcase with proper amount of oil.

BEARING -CRANKSHAFT MAIN

STANDARD PROCEDURE

BEARING -CRANKSHAFT MAIN FITTING

Fig. 187: Engine Block Main Bore Grade
Courtesy of CHRYSLER LLC

The main bearings are a "select fit" to achieve proper oil clearances. For main bearing selection, the block and

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

crankshaft have grade identification marks.

The marks for the cylinder block main bore grade are located on the right front side of the engine block. See
Fig. 187. These grade marks (1, 2, or 3) are read left to right, corresponding to main bore 1, 2, 3, 4. The 5th
digit is a check some digit for plant validation during manufacturing.

Fig. 188: Crankshaft Main Journal Grade Marking Location - Rear of Block
Courtesy of CHRYSLER LLC

The grade marks for the crankshaft are located on the rearmost crankshaft counter weight as shown in Fig. 188.
The crankshaft journal grade marks (A, B, or C) are read left to right, corresponding with journal number 1, 2,
3, 4.

Refer to . Refer to to properly select the main bearings. For an example, if the main bore grade is 3 and the
journal grade is B, the proper select fit bearing would be a (2) +0.003 mm (+0.0002 in.).

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro

Fig. 189: Main Bearing Grade Marks
Courtesy of CHRYSLER LLC

1 - LOWER MAIN BEARING
2 - UPPER MAIN BEARING
3 - OIL FEED HOLE AND GROOVE
4 - GRADE SELECTION INK MARKS

NOTE:

Service main bearings have a number from (1-5) marked in ink on the bearing

2007 Dodge Nitro R/T

2007 ENGINE 4.0L - Service Information - Nitro