CRANKSHAFT REPLACEMENT (CONT)
Make sure all main bearing saddles and thrust bearing counterbores in cylinder
block are clean.
Each upper main bearing shell is grooved with oil hole. Register oil hole in
each upper main bearing shell with oil hole in each main bearing saddle of
Install main bearings in sets only. Do not mix old and new main bearing shells
on same journal. If old bearings are installed, they must be installed in same
journal they were removed from.
INVERT ENGINE BLOCK. INSTALL SEVEN UPPER MAIN BEARING SHELLS (5) IN CYLINDER
BLOCK JOURNALS (6).
WIPE OIL FROM BEARING SHELLS AND CRANKSHAFT JOURNALS TO BE CHECKED.
Crankshaft weighs 408 lb (185.23 kg). Use suitable lifting device to lift and
support crankshaft. Failure to do so could result in serious injury to personnel.
USING NYLON ROPE AND SUITABLE LIFTING DEVICE, POSITION CRANKSHAFT (7) IN CYLINDER
BLOCK (8) ON UPPER MAIN BEARING SHELLS (5).
USING STRIP OF PLASTIGAUGE. MEASURE BEARING CLEARANCES BETWEEN Crankshaft
JOURNALS OF MAIN BEARINGS. PLASTIGAUGE TYPE PG-1 (GREEN) HAS CLEARANCE RANGE
OF 0.001-0.003 IN. (0.0254-0.0762 mm). TYPE PR-21 (RED) HAS CLEARANCE RANGE OF
0.002-0.006 IN. (0.0508-0.01524 mm). TYPE PB-I (BLUE) HAS CLEARANCE OF 0.004-0.009 IN.