Oil Clearance

1. Uniformly loosen and remove the 14 main bearing cap bolts, in several passes, in the sequence shown.





2. Using the removed main bearing cap bolts, pry the main bearing cap back and forth, and remove the main bearing caps, lower bearings and lower thrust washers (No. 4 main bearing cap only).

NOTE:
- Keep the lower bearing and main bearing cap together.
- Arrange the main bearing caps and lower thrust washers in correct order.

3. Lift out the crankshaft.

NOTE: Keep the upper bearing and upper thrust washers together with the cylinder block.

4. Clean each main journal and bearing.
5. Check each main journal and bearing for pitting and scratches.

NOTE:
- If the journal or bearing is damaged, replace the bearings.
- If necessary, grind or replace the crankshaft.

6. Place the crankshaft on the cylinder block.





7. Lay a strip of Plastigage across each journal.
8. Install the main bearing caps.





9. Using the sequence shown in illustration, tighten main bearing caps in two stages:
1st step, 44 Nm (33 ft. lbs.)
2nd step, turn an additional 90°

NOTE: Do not turn the crankshaft.
10. Remove the main bearing caps.





11. Measure the Plastigage at its widest point.
Standard clearance:
Standard bearings: 0.026-0.040 mm (0.0010-0.0016 inch).
0.25 mm undersize bearings: 0.025-0.061 mm (0.0010-0.0024 inch).
Maximum clearance:
Standard bearings: 0.06 mm (0.0024 inch).
0.25 mm undersize bearings: 0.08 mm (0.0031 inch).
12. If the oil clearance is greater than maximum, replace the bearings. If necessary, grind or replace the crankshaft.





NOTE:
- If using a standard bearing, replace with one having the same number.
- If the number of the bearing cannot be determined, select the correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft, then refer to the table below for the appropriate bearing number.
- There are 5 sizes of standard bearings, marked "1", "2", "3", "4" and "5" accordingly.
Reference
Cylinder block main journal bore diameter (A):
Mark "0" 66.020-66.022 mm (2.59922-2.59929 inch).
Mark "1" 66.022-66.024 mm (2.59929-2.59936 inch)
Mark "2" 66.024-66.026 mm (2.59936-2.59944 inch)
Mark "3" 66.026-66.028 mm (2.59944-2.59952 inch)
Mark "4" 66.028-66.030 mm (2.59952-2.59960 inch)
Mark "5" 66.030-66.032 mm (2.59960-2.59968 inch)
Mark "6" 66.032-66.034 mm (2.59968-2.69976 inch)
Mark "7" 66.034-66.036 mm (2.59976-2.59984 inch)
Crankshaft main journal diameter (B):
Mark "0" 61.998-62.000 mm (2.44086-2.44094 inch)
Mark "1" 61.996-61.998 mm (2.44078-2.44086 inch)
Mark "2" 61.994-61.996 mm (2.44070-2.44078 inch)
Mark "3" 61.992-61.994 mm (2.44063-2.44070 inch)
Mark "4" 61.990-61.992 mm (2.44055-2.44063 inch)
Mark "5" 61.988-61.990 mm (2.44047-2.44055 inch)
Mark "6" 61.986-61.988 mm (2.44039-2.44047 inch)
Mark "7" 61.984-61.986 mm (2.44031-2.44039 inch)
Standard bearing center wall thickness:
Mark "1" 1.994-1.997 mm (0.0785-0.0786 inch)
Mark "2" 1.997-2.000 mm (0.0786-0.0787 inch)
Mark "3" 2.000-2.003 mm (0.0787-0.0789 inch)
Mark "4" 2.003-2.006 mm (0.0789-0.0790 inch)
Mark "5" 2.006-2.009 mm (0.0790-0.0791 inch)
13. Completely remove the Plastigage.