Subaru Legacy 2004 Service Manual page 1184

NOTE:
Piston front mark faces towards the front of engine.
(A) Front mark
21) Installation of piston pin:
(1) Apply a coat of engine oil to ST3 before in-
sertion, and then insert it into the service hole to
align piston pin hole with connecting rod small
end.
ST3 499017100 PISTON PIN GUIDE
ST1
(2) Apply a coat of engine oil to piston pin, and
insert the piston pin into piston and connecting
rod through service hole.
(3) Install the snap ring.
NOTE:
Use new snap rings.
Cylinder Block
(A)
ME-00722
ST3
ME-00158
ME-00159
ME(H4DOTC)-73
(4) Apply liquid gasket around the service hole
plug.
Liquid gasket:
THREE BOND 1215 (Part No. 004403007) or
equivalent
(5) Install the service hole plug and gasket.
NOTE:
Use a new gasket.
MECHANICAL
ME-00160
ME-00140