Check the crankshaft main bearing oil clearance.
To check main bearing-to-journal oil clearance, remove the bearing caps with their lower bearings.
Clean each main journal and lower bearing with a clean shop towel.
Place one strip of plastigage across each main journal.
Reinstall the bearing caps with their lower bearings, then tighten the bolts.
Tightening torque :
49.0 N.m (5.0 kgf.m, 36.2 lb-ft) + 120°
Do not turn the crankshaft.
Do not reuse the main bearing cap bolts.
Remove the bearing caps with their lower bearing again, and measure the widest part of the plastigage.
Bearing oil clearance :
0.026 ~ 0.044 mm (0.0010 ~ 0.0017 in)
If the plastigage measures too wide or too narrow, remove the upper and lower bearing and then install a new bearings with the same color mark. Recheck the oil clearance.
Do not file, shim, or scrape the bearings or the cap to adjust clearance.
If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing. Recheck the oil clearance.
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.
Select the bearing by using selection table.
Letters have been stamped on the side of block as a mark for the size of each of the 5 main journal bores.
Use them, and the numbers or letters stamped on the crank (marks for main journal size), to choose the correct bearings.
Crankshaft main bearing | Cylinder block crankshaft journal bore mark | |||
A(A) | B(B) | C(C) | ||
Crankshaft main journal mark | I(A) | A(Blue) | B(Black) | C(Red) |
II(B) | B(Black) | C(Red) | D(Green) | |
III(C) | C(Red) | D(Green) | E(Yelllow) | |
Class | Mark | Cylinder block journal bore inner diameter |
A | A | 64.000 ~ 64.006 mm (2.5197 ~ 2.5199 in) |
B | B | 64.006 ~ 64.012 mm (2.5199 ~ 2.5202 in) |
C | C | 64.012 ~ 64.018 mm (2.5202 ~ 2.5204 in) |
Class | Mark | Crankshaft main journal outer diameter |
I | A | 60.012 ~ 60.018 mm (2.3627 ~ 2.3629 in) |
II | B | 60.006 ~ 60.012 mm (2.3624 ~ 2.3627 in) |
III | C | 60.000 ~ 60.006 mm (2.3622 ~ 2.3624 in) |
Class | Color | Crankshaft main bearing thickness |
A | Blue | 1.975 ~ 1.978 mm (0.0778 ~ 0.0779 in) |
B | Black | 1.978 ~ 1.981 mm (0.0779 ~ 0.0780 in) |
C | Red | 1.981 ~ 1.984 mm (0.0780 ~ 0.0781 in) |
D | Green | 1.984 ~ 1.987 mm (0.0781 ~ 0.0782 in) |
E | Yellow | 1.987 ~ 1.990 mm (0.0782 ~ 0.0783 in) |
