3-9. CRANKSHAFT MAIN BEARINGS - REPLACE (Contd)
If main bearing position number on bearing
cap is missing or hard to read, etch the
correct number on the bearing cap so that it
is facing the oil cooler side of the engine.
Remove one main bearing set at a time.
Remove two capscrews (1) and bearing cap
(2) from main bearings 2, 3, 4, 5, or 6 only.
DO NOT remove bearing caps from main
bearings 1 and 7 at this time.
If crankshaft is turned in the wrong direction,
the tab on the upper bearing half will be
pushed between the crankshaft and main
bearing bore in the block. This could cause
damage to the block and the crankshaft.
(App. C, Fig. C-7) into oil hole in crankshaft
journal for main bearing being removed.
Slowly turn crankshaft so the bearing
removal/installation tool pushes against the
end of the bearing opposite the tab, and
upper bearing half (3) is out of the cylinder
Remove bearing removal/installation tool
from crankshaft oil hole.
Remove lower bearing half (4) from bearing
cap (2). Keep main bearings and bearing
caps together as a set.
When bearings are reused, each bearing
must be installed in its original location
because the bearing surfaces have a wear
pattern matched to the crankshaft journals.