Vortec 1600 - Crankshaft Bearing Clearance, Check (Determine Crankshaft Bearing Clearnace Using External Micrometer and Inside Micrometer)

Industrial 1.6L Engine Mechanical 1-71
Removal Procedure
1. Remove crankshaft bearing cap.
Measure
1. Compare width of flattened plastic thread (arrow) with
measuring scale.
”Plastigage” is available for various measuring ranges.
Perm. crankshaft bearing play: 0.015 to 0.041 mm.
Torque – Angle Method
1. Attach crankshaft bearing cap to cylinder block with new
bolts.
Tighten
Tightening torque 50 Nm / 37 lb. ft. + 45° + 15°.
Crankshaft Bearing Clearance, Check
(Determine Crankshaft Bearing Clearance
Using External Micrometer and Inside
Micrometer)
Notice: The crankshaft is removed.
Installation Procedure
1. Install crankshaft bearing cap with crankshaft bearing
shell at cylinder block.
Tighten
Tightening torque 50 Nm / 37 lb. ft. + 45° + 15°. To check
the crankshaft bearing play, bolt can be reused.
Measure
The average crankshaft bearing diameter is determined us-
ing an inside micrometer at points I, II and III and then calcu-
lated.
Formula for calculating the average crankshaft bearing diam-
eter: I + II + III
3
Example:
I 54.972 mm
II 54.981 mm
III + 54.984 mm
164.937 mm / 3 = 54.979 mm
The average crankshaft bearing diameter is 54.979 mm.