Subaru Impreza 2003, Service Manual

Page: 294 / 3610

ME(H4SO)-82
MECHANICAL
CYLINDER BLOCK
25) Installation of oil pump
(1) Discard the front oil seal after removal. Re-
place with a new one using the ST.
ST 499587100 OIL SEAL INSTALLER
(2) Apply fluid packing to the matching surface
of oil pump.
Fluid packing:
Part No. 004403007
THREE BOND 1215 or equivalent
(3) Apply a coat of engine oil to the inside of oil
seal.
(4) Install the oil pump on cylinder block. Be
careful not to damage the oil seal during instal-
lation.
Tightening torque:
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
CAUTION:
• Do not forget to the install the O-ring and seal
when installing oil pump.
• Align flat surface of oil pump's inner rotor
with crankshaft before installation.
26) Install the water pump and gasket.
Tightening torque:
First; 12 N·m (1.2 kgf-m, 8.7 ft-lb)
Second; 12 N·m (1.2 kgf-m, 8.7 ft-lb)
CAUTION:
• Be sure to use a new gasket.
• When installing the water pump, tighten the
bolts in two stages in alphabetical sequence as
shown in the figure.
27) Install the water by-pass pipe for heater.
28) Install the oil filter using ST.
ST
498547000 OIL FILTER WRENCH
29) Tighten the cylinder head bolts.
(1) Apply a coat of engine oil to the washers and
bolt threads.
(2) Tighten all bolts to 29 N·m (3.0 kgf-m, 22 ft-
lb) in alphabetical sequence.
Then tighten all bolts to 69 N·m (7.0 kgf-m, 51 ft-
lb) in alphabetical sequence.
(3) Back off all bolts by 180
°
first; back them off
by 180
°
again.
(4) Tighten the bolts (a) and (b) to 34 N·m (3.5
kgf-m, 25 ft-lb).
(5) Tighten the bolts (c), (d), (e) and (f) to 15
N·m (1.5 kgf-m, 11 ft-lb).
(6) Tighten all bolts by 80
°
to 90
°
in alphabetical
sequence.
CAUTION:
Do not tighten bolts more than 90
°°°°
.
(A) O-ring
ME-00164
ME-00165
(A)
ME-00312
ME-00333
(F)
(B)
(D)
(E)
(A)
(C)