Subaru 2009 IMPREZA Service Manual page 298

MECHANICAL
(3) Apply a coat of engine oil to the pistons and
cylinders and insert pistons in their cylinders us-
ing ST2.
ST2 498747300 PISTON GUIDE
ST2
NOTE:
Face the piston front mark towards the front of the
engine.
R H
(A) Front mark
21) Install the piston pin.
(1) Apply a coat of engine oil to ST3.
(2) Insert ST3 into the service hole to align pis-
ton pin hole with connecting rod small end.
ST3 499017100 PISTON PIN GUIDE
ST1
(3) Apply a coat of engine oil to piston pin, and
insert the piston pin into piston and connecting
rod through service hole.
Cylinder Block
ST1
ME-00157
(A)
L H
ME-02725
ST3
ME-00158
ME(H4SO)-80
(4) Install the snap ring.
NOTE:
Use new snap rings.
(5) Apply liquid gasket to the threaded portion
of the service hole plug.
Liquid gasket:
THREE BOND 1105 (Part No. 004403010) or
equivalent
ME-00159
ME-00160