Mitsubishi 4G1 Service Manual page 403

Oil groove
Timing belt side
CRANKSHAFT BEARING (UPPER) /
THRUST BEARING A / THRUST BEARING B /
CRANKSHAFT BEARING (LOWER) INSTALLATION
whether there is an oil groove or not. Then, assemble as
shown in the illustration.
(2) Assemble the thrust bearings (A and B) on the No.3 journal
area as shown.
Caution
Install them with the groove side facing outward.
Crankshaft
bearing (upper)
Timing belt side
No oil groove