3-9. CRANKSHAFT MAIN BEARINGS - REPLACE (Contd)
Clean main bearing surfaces in the cylinder
block and bearing caps with cleaning
solvent P-D-680. Dry surfaces thoroughly
with low pressure compressed air (15 psig
Install bearing halves dry for the following
Refer to end play data measured earlier in
REMOVAL, STEP 1. If crankshaft end play
is not within 0.005 to 0.010 inch, install a
new, appropriate oversize thrust bearing
Install a dry upper main bearing half (3)
over the crankshaft journal such that the
bearing tab will fit into the notch in cylinder
block. If used main bearing is being
installed, install upper bearing half in the
same position it was removed from.
(App. C, Fig. C-7) into bearing journal oil
hole so that it will push against tab end of
If the crankshaft is turned in the wrong
direction, the bearing tab will be pushed
between the crankshaft and bearing area in
the block. This could cause damage to the
block and the crankshaft.
direction until upper bearing tab is in the
cylinder block notch.
Remove bearing removal/installation tool
from crankshaft oil hole.