Check the crankshaft bearing oil clearance.
To check main bearing-to-journal oil clearance, remove the main bearing caps and bearing halves.
Clean each main journal and bearing half with a clean shop tower.
Place one strip of plastigage across each main journal.
Reinstall the bearings and caps, then torque the bolts.
Tightening torque
No.1~8 : 49.0 N.m (5.0 kgf.m, 36.2 lb-ft) + 90°
No.9~16 : 19.6 N.m (2.0 kgf.m, 14.5 lb-ft)+ 120°
No.17~24 :
29.4 ~ 31.4 N.m (3.0 ~ 3.2 kgf.m, 21.7 ~ 23.1 lb-ft)
Do not turn the crankshaft.
Remove the cap and bearing again, and measure the widest part of the plastigage.
Standard oil clearance :
0.022 ~ 0.040 mm (0.0009 ~ 0.0016 in.)
If the plastigage measures too wide or too narrow, remove the upper half of the bearing, install a new, complete bearing with the same color mark (select the color as shown in the next column), and recheck the clearance.
Do not file, shim, or scrape the bearings or the caps to adjust clearance.
If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below that one), and check clearance again.
If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start over.
If the marks are indecipherable because of an accumulation of dirt and dust, do not scrub them with a wire brush or scraper. Clean them only with solvent or detergent.
Crankshaft bore mark location
Letters have been stamped on the block as a mark for the size of each of the 4 main journal bores.
Use them, and the numbers or bar stamped on the crank (marks for main journal size), to choose the correct bearings.
Class | Mark | Inside Diameter |
a | A | 73.500 ~ 73.506 mm (2.8937 ~ 2.8939 in.) |
b | B | 73.506 ~ 73.512 mm (2.8939 ~ 2.8942 in.) |
c | C | 73.512 ~ 73.518 mm (2.8942 ~ 2.8944 in.) |
Class | Mark | Outside Diameter Of Journal |
I | 1 or A | 68.954 ~ 68.960 mm (2.7147 ~ 2.7150 in.) |
II | 2 or B | 68.948 ~ 68.954 mm (2.7145 ~ 2.7147 in.) |
III | 3 or C | 68.942 ~ 68.948 mm (2.7142 ~ 2.7145 in.) |
Class | Mark | Thickness Of Bearing |
E | Blue | 2.277 ~ 2.280 mm (0.0896 ~ 0.0897 in.) |
D | Black | 2.274 ~ 2.277 mm (0.0895 ~ 0.0896 in.) |
C | Red | 2.271 ~ 2.274 mm (0.0894 ~ 0.0895 in.) |
B | Green | 2.268 ~ 2.271 mm (0.0893 ~ 0.0894 in.) |
A | Yellow | 2.265 ~ 2.268 mm (0.0892 ~ 0.0893 in.) |
Crankshaft Bore Identification Mark | ||||
a(A) | b(B) | c(C) | ||
Crankshaft Identification Mark | 1 or A | A (Yellow) | B (Green) | C (Red) |
2 or B | B (Green) | C (Red) | D (Black) | |
3 or C | C (Red) | D (Black) | E (Blue) | |
