2009 SUBARU TRIBECA Service Workshop Manual

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Page 1937 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-71
Cylinder Block
MECHANICAL
E: INSPECTION
1. CYLINDER BLOCK
1) Visually check for cracks and damage. Especial-
ly, inspect the important parts using liquid pene-
trant tester.
2) Chec

Page 1938 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-72
Cylinder Block
MECHANICAL
4) How to measure the outer diameter of each pis-
ton:
Measure the outer diameter of each piston at the
height as shown in the figure. (Thrust direction)

ME(H6DO)-72
Cylinder Block
MECHANICAL
4) How to measure the outer diameter of each pis-
ton:
Measure the outer diameter of each piston at the
height as shown in the figure. (Thrust direction)
NOTE:
Measurement should be performed at a tempera-
ture of 20°C (68°F).
Piston grade point H:
37.3 mm (1.4865 in)
Piston outer diameter:
Standard
A: 89.205 — 89.215 mm (3.5120 — 3.5124
in)
B: 89.195 — 89.205 mm (3.5116 — 3.5120
in)
0.25 mm (0.0098 in) oversize
89.445 — 89.465 mm (3.5215 — 3.5222 in)
0.50 mm (0.0197 in) oversize
89.695 — 89.715 mm (3.5313 — 3.5321 in)
5) Calculate the clearance between cylinder and
piston.
NOTE:
Measurement should be performed at a tempera-
ture of 20°C (68°F).
20 Cylinder to piston clearance at 20°C (68°F):
Standard
–0.010 — 0.010 mm (–0.00039 — 0.00039 in)
6) Boring and honing:
(1) If the value of cylindricality, out-of-round-
ness, or cylinder-to-piston clearance measured
is out of standard or if there is any damage on
the cylinder wall, rebore it to use an oversize
piston.
CAUTION:
When any of the cylinders needs reboring, all
other cylinders must be bored at the same time,
and use oversize pistons. Do not perform bor-
ing on one cylinder only. Nor use an oversize
piston for one cylinder only.
(2) If the cylinder inner diameter exceeds
89.715 mm (3.5321 in) after boring and honing,
replace the crankcase.
NOTE:
Immediately after reboring, the cylinder diameter
may differ from its real diameter due to temperature
rise. Thus, pay attention to this when measuring
the cylinder diameter.
3. PISTON AND PISTON PIN
1) Check the pistons and piston pins for damage,
cracks and wear, and the piston ring grooves for
wear and damage. Replace if faulty.
2) Measure the piston-to-cylinder clearance at
each cylinder. AND PISTON, INSPECTION, Cylinder Block.>If
any of the clearances is not within standard, re-
place the piston or bore the cylinder to use an over-
size piston.
3) Make sure that the piston pin can be inserted
into the piston pin hole with a thumb at 20°C (68°F).
Replace if faulty.
Standard clearance between piston pin and
hole in piston:
Standard
0.004 — 0.008 mm (0.0002 — 0.0003 in)
ME-00172
H
ME-00173
ME-00174

Page 1939 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-73
Cylinder Block
MECHANICAL
4) Check the snap ring installation groove (A) on
the piston for burr. If necessary, remove burr from
the groove so that the piston pin can lightly move.
5

Page 1940 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-74
Cylinder Block
MECHANICAL
5. CONNECTING ROD
1) Replace the connecting rod, if the large or small
end thrust surface is damaged.
2) Check for bend or twist using a connecting rod
al

Page 1941 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-75
Cylinder Block
MECHANICAL
7) Replacement procedure is as follows.
(1) Remove the bushing from connecting rod
with ST and press.
(2) Press the bushing with ST after applying oil
on the

Page 1942 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-76
Cylinder Block
MECHANICAL
4) Measure the thrust clearance of crankshaft at
center bearing. If clearance exceeds the standard,
replace the bearing.
Crankshaft thrust clearance:
Standa

Page 1943 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-77
Oil Flow Control Solenoid Valve
MECHANICAL
22.Oil Flow Control Solenoid
Valve
A: REMOVAL
Oil flow control solenoid valve is a unit with cam-
shaft cap.
Refer to "Camshaft" for re

Page 1944 of 2453

SUBARU TRIBECA 2009 1.G Service Workshop Manual ME(H6DO)-78
Oil Switching Solenoid Valve
MECHANICAL
23.Oil Switching Solenoid Valve
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the air intake chamber.
<Ref. to IN(H6DO)-6, REMOV

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