Install bearing halves dry for the following clearance checks.
Refer to end play data measured earlier in Removal, Step (1). If crankshaft (1) end play is not
within 0.005 - 0.010 in. (0.13 - 0.25 mm), install a new, appropriate oversize thrust bearing (2).
Install a dry main upper bearing half (5) over the crankshaft (1) journal such that the bearing
tab will fit into the notch in cylinder block. If used main bearing half is being installed, install
upper bearing half in the same position it was removed from.
Insert bearing removal/installation
tool 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
Slowly turn crankshaft (1) in the
correct direction until upper bearing tab is in the cylinder block notch.
Remove bearing removal/installation tool from crankshaft oil hole.
After each upper bearing half is
installed, install the respective
lower bearing half and bearing cap
as described in the following steps.
Install a dry lower main bearing
half (6) in bearing cap (3). Tab on
bearing must be in the notch in
bearing cap. If used main bearing is
being installed, install bearing in
the same bearing cap it was
Do not turn crankshaft after
plastigage is in position. Plastigage
will be distorted.
Place plastigage on the surface of
lower bearing half (6).