2009 SUBARU TRIBECA cylinder

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

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) Check the piston pin snap ring for distortion,
cracks and wear.
4. PISTON RING
1) If the piston ring is broken, damaged or worn, or
if its tension is insufficient, or when the piston is re-
placed, replace the piston ring with a new one of
the same size as piston.
CAUTION:
•Marks are displayed on the end of top and
second rings. When installing the ring to pis-
ton, face this mark upward.
•Oil ring consists of the upper rail, expander
and lower rail. When installing on the piston, be
careful of the direction of each rail
2) Squarely place the piston ring and oil ring in cyl-
inder, and measure the piston ring gap with a thick-
ness gauge.
3) Measure the clearance between piston ring and
piston ring groove with a thickness gauge.
NOTE:
Before measuring the clearance, clean the piston
ring groove and piston ring.
(A) Top ring
(B) Second ring
(C) Oil ring
(a) Upper rail
(b) Expander
(c) Lower rail
ME-00175
(A)
(a)
(c)
(b)
(A)
(B)
(C)
ME-00591
Standard
mm (in)
Piston ring gap
To p r i n g0.20 — 0.35
(0.0079 — 0.0138)
Second ring0.35 — 0.50
(0.0138 — 0.0197)
Oil ring0.20 — 0.60
(0.0079 — 0.0236)
Standard
mm (in)
Clearance
between piston
ring and piston
ring groove
To p r i n g0.040 — 0.080
(0.0016 — 0.0031)
Second ring0.030 — 0.070
(0.0012 — 0.0028)
Clearance between oil ring and oil
ring groove
0.045 — 0.125
(0.0018 — 0.0049)
ME-00592
ME-00178

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
aligner. Replace the connecting rod if it has the
bend or twist.
3) Install the connecting rod fitted with bearing to
crankshaft and measure the thrust clearance. If the
clearance exceeds the standard or offset wear oc-
curs, replace the connecting rod.
Connecting rod thrust clearance:
Standard
0.070 — 0.330 mm (0.0028 — 0.0130 in)
4) Inspect the connecting rod bearing for scar,
peeling, seizure, melting, wear, etc.
5) Measure the oil clearance on each connecting
rod bearing using plastigauge. If any oil clearance
is not within the standard, replace the defective
bearing with a new one of standard size or under-
size as necessary. (See the table below.)
Connecting rod oil clearance:
Standard
0.016 — 0.043 mm (0.0006 — 0.0017 in)
6) Inspect the bushing at connecting rod small end,
and replace if worn or damaged. Also measure the
piston pin clearance at connecting rod small end.
Clearance between piston pin and bushing:
Standard
0 — 0.022 mm (0 — 0.0009 in)(A) Thickness gauge
(B) Connecting rod
(A)
(A)
(B)
(B)
ME-00179
ME-00180
Unit: mm (in)
Bearing
Bearing size
(Thickness at cen-
ter)
Outer diameter of
crank pin
Standard1.490 — 1.506
(0.0587 — 0.0593)
51.984 — 52.000
(2.0466 — 2.0472)
0.03
(0.0012)
undersize
1.509 — 1.513
(0.0594 — 0.0596)
51.954 — 51.970
(2.0454 — 2.0461)
0.05
(0.0020)
undersize
1.519 — 1.523
(0.0598 — 0.0600)
51.934 — 51.950
(2.0446 — 2.0453)
0.25
(0.0098)
undersize
1.619 — 1.623
(0.0637 — 0.0639)
51.734 — 51.750
(2.0368 — 2.0374)
ME-00181
ME-00174

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 periphery of bushing.
ST 18350AA000 CONNECTING ROD BUSH-
ING REMOVER & INSTALL-
ER
(3) Make two 3 mm (0.12 in) holes in bushing.
Ream the inside of bushing.
(4) After completion of reaming, clean the bush-
ing to remove chips.
6. CRANKSHAFT AND CRANKSHAFT
BEARING
1) Clean the crankshaft completely, and check it for
cracks using liquid penetrant tester. Replace if de-
fective.
2) Check the crankshaft for bend, and repair or re-
place if needed. Repair or replace if bended.
NOTE:
If a suitable V-block is not available, install #1 and
#5 crankshaft bearing on cylinder block, position
the crankshaft on these bearings, and then check
the crankshaft bend using a dial gauge.
3) Inspect the crank journal and crank pin for wear.
If they are not within the specification, replace the
bearing with a suitable (undersize) one, and re-
place or readjust crankshaft as necessary. When
grinding the crank journal or crank pin, finish them
to the specified dimensions according to the under-
size bearing to be used.
Crank pin and crank journal:
Out-of-roundness
0.005 mm (0.0002 in)
Cylindricality
0.006 mm (0.0002 in)
ST
ME-00597
ME-00598
ME-00184

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:
Standard
0.030 — 0.115 mm (0.0012 — 0.0045 in)
5) Inspect individual crankshaft bearings for signs
of flaking, seizure, melting and wear.
6) Measure the oil clearance on each crankshaft
bearing using plastigauge. If the measured value is
out of standard, replace the defective bearing with
an undersize one, and replace or recondition the
crankshaft as necessary.
Crankshaft oil clearance:
Standard
0.010 — 0.030 mm (0.0004 — 0.0012 in)
Unit: mm (in)
Crank journal diameterCrank pin outer diameter#1, #3, #5, #7 #2, #4, #6
Standard
Journal O.D.63.992 — 64.008
(2.5194 — 2.5200)
51.984 — 52.000
(2.0466 — 2.0472)
Bearing size
(Thickness at
center)
1.992 — 2.005
(0.0784 — 0.0789)
1.996 — 2.009
(0.0786 — 0.0791)
1.490 — 1.506
(0.0587 — 0.0593)
0.03 (0.0012)
undersize
Journal O.D.63.962 — 63.978
(2.5182 — 2.5188)
51.954 — 51.970
(2.0454 — 2.0461)
Bearing size
(Thickness at
center)
2.011 — 2.014
(0.0792 — 0.0793)
2.015 — 2.018
(0.0793 — 0.0794)
1.509 — 1.513
(0.0594 — 0.0596)
0.05 (0.0020)
undersize
Journal O.D.63.942 — 63.958
(2.5174 — 2.5180)
51.934 — 51.950
(2.0446 — 2.0453)
Bearing size
(Thickness at
center)
2.021 — 2.024
(0.0796 — 0.0797)
2.025 — 2.028
(0.0797 — 0.0798)
1.519 — 1.523
(0.0598 — 0.0600)
0.25 (0.0098)
undersize
Journal O.D.63.742 — 63.758
(2.5095 — 2.5102)
51.734 — 51.750
(2.0368 — 2.0374)
Bearing size
(Thickness at
center)
2.121 — 2.124
(0.0835 — 0.0836)
2.125 — 2.128
(0.0837 — 0.0838)
1.619 — 1.623
(0.0637 — 0.0639)
ME-00600

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.
ber.>
3) Disconnect the connector from oil switching so-
lenoid valve.
4) Remove the oil switching solenoid valve.
5) Remove the variable valve lift diagnosis oil pres-
sure switch.
Lift Diagnosis Oil Pressure Switch.>
6) Remove the oil temperature sensor.
ture Sensor.>
7) Remove the oil flow control solenoid valve hold-
er from cylinder head.
B: INSTALLATION
1) Install the oil switching solenoid valve holder.
NOTE:
Always use new gasket.
(1) Temporarily tighten the bolts by tightening
torque of 5 — 10 N·m (0.5 — 1.0 kgf-m, 3.7 —
7.4 ft-lb) in order shown in the figure.
(2) Tighten the bolts by tightening torque of
10±0.5 N·m (1.0±0.05 kgf-m, 7.4±0.37 ft-lb) in
order shown in the figure.
2) Install the oil temperature sensor.
perature Sensor.>
3) Install the variable valve lift diagnosis oil pres-
sure switch.
Valve Lift Diagnosis Oil Pressure Switch.>
4) Install the oil switching solenoid valve.
5) Connect the connector to oil switching solenoid
valve.
6) Install the air intake chamber.
Chamber.>
ME-02071
ME-02072
ME-02073
(2)(1)
(5)
(4)
(3)
ME-02071

ME(H6DO)-79
Intake and Exhaust Valve
MECHANICAL
24.Intake and Exhaust Valve
A: SPECIFICATION
Refer to “Cylinder Head” for removal and installa-
tion procedures of intake and exhaust valves to ME(H6DO)-57, REMOVAL, Cylinder Head.>,
Head.>.

ME(H6DO)-80
Piston
MECHANICAL
25.Piston
A: SPECIFICATION
Refer to “Cylinder Block” for removal and installa-
tion procedures of pistons. REMOVAL, Cylinder Block.> 64, INSTALLATION, Cylinder Block.>