Check the connecting rod bearing oil clearance.
To check main bearing-to-journal oil clearance, remove the main bearings.
Clean each main journal and bearing half with a clean shop tower.
Place one strip of plastigage across each main journal.
Use the SST (09221-4A000), reinstall the bearings and bolts as following method with specified torque. In the sequence.
Tightening torque :
17.7 ~ 21.6 N.m (1.8 ~ 2.2 kgf.m, 13.0 ~ 15.9 lb-ft) + 88 ~ 92°
Do not turn the crankshaft.
Always use new crankshaft main bearing cap bolts. Crankshaft main bearing cap bolts are torque-to-yield bolts designed to be permanently elongated beyond the state of elasticity when torqued, so if the bolts are removed and reused, it may cause the bolts to break or fail to maintain clamping force.
Remove the cap and bearing again, and measure the widest part of the plastigage.
Standard oil clearance :
0.006 ~ 0.024 mm (0.0002 ~ 0.0009 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.
Cylinder block crankshaft journal bore mark location
Letters have been stamped on the block as a mark for the size of each of the 5 main journal bores.
Use them, and the numbers or bar stamped on the crank (marks for main journal size), to choose the correct bearings.
Grade | Mark | Connecting Rod Big-end Inner Diameter |
a | A | 42.000 ~ 42.006 mm (1.6535 ~ 1.6538 in) |
b | B | 42.006 ~ 42.012 mm (1.6538 ~ 1.6540 in) |
c | C | 42.012 ~ 42.018 mm (1.6540 ~ 1.6543 in) |
Crankshaft Main Journal Mark Location
Class | Mark | Crankshaft main journalouter diameter |
I | 1 | 47.954 ~ 47.960 mm (1.8879 ~ 1.8881 in) |
II | 2 | 47.948 ~ 47.954 mm (1.8877 ~ 1.8879 in) |
III | 3 | 47.942 ~ 47.948 mm (1.8874 ~ 1.8877 in) |
Crankshaft Main Bearing Mark Location
Mark | Color | Connecting Rod Bearing Thickness |
A | Blue | 1.514 ~ 1.517 mm (0.0596 ~ 0.0597 in) |
B | Black | 1.511 ~ 1.514 mm (0.0595 ~ 0.0596 in) |
C | None | 1.508 ~ 1.511 mm (0.0594 ~ 0.0595 in) |
D | Green | 1.505 ~ 1.508 mm (0.0593 ~ 0.0594 in) |
E | Yellow | 1.502 ~ 1.505 mm (0.0591 ~ 0.0593 in) |
Select the bearing by using selection table.
Crankshaft Main Bearing Selection Table
Crankshaft Main Bearing | Cylinder Block Crankshaft Journal Bore Mark | |||
a(A) | b(B) | c(C) | ||
Crank shaft main journal mark | I(1) | E(Yellow) | D(Green) | C(None) |
II(2) | D(Green) | C(None) | B(Black) | |
III(3) | C(None) | B(Black) | A(Blue) | |
