Sable V6-183 3.0L DOHC VIN S MFI (1997)
Crankshaft: Testing and Inspection
Fitting/Oil Clearance Check
INSPECTION
1. Clean crankshaft journals. Inspect journals and thrust faces for nicks, burrs or roughness that would cause premature bearing wear.
CAUTION: To maintain proper main bearing bore alignment, the lower cylinder block must be loosened and tightened as a unit.
2. If crankshaft main journals are not damaged or worn excessively, use select-fit codes on cylinder block and crankshaft with the select-fit grade
chart to determine appropriate replacement grade for the crankshaft main bearings.
3. If crankshaft journals are worn or damaged, replace crankshaft and use select-fit grade chart to determine appropriate replacement grade for the
crankshaft main bearings.
SELECTING BEARINGS
1. Using the 11-character code located on the cylinder block and crankshaft, select the proper grade of crankshaft main bearings as follows:
2. Read the 11-character code on the cylinder block face and the crankshaft flange.
A. The first two numbers after the first asterisk are the code for the No.1 main journal.
B. The second two numbers after the first asterisk are the code for the No. 2 main journal.
C. The first two numbers after the second asterisk are the code for the No.3 main journal.
D. The last two numbers are the code for the No.4 main journal.
3. Using the Select Fit Main Bearing Grade Chart and the character codes noted above, move across and down the appropriate row and column to
select the bearing grade for the No. 1 main journal.
4. Repeat the procedure for the other main journals.
5. When installing bearings, visually check seating and squareness of all bearings. Make sure all oiling holes align with cylinder block oil feed holes.
