head gasket SUBARU TRIBECA 2009 1.G Service Workshop Manual
[x] Cancel search | Manufacturer: SUBARU, Model Year: 2009, Model line: TRIBECA, Model: SUBARU TRIBECA 2009 1.GPages: 2453, PDF Size: 46.32 MB
Page 1149 of 2453
CO(H6DO)-30
Engine Cooling System Trouble in General
COOLING
12.Engine Cooling System Trouble in General
A: INSPECTION
Tr o u b l e P o s s i b l e c a u s e C o r r e c t i v e a c t i o n
Overheating
a. Insufficient engine coolantReplenish engine coolant, inspect for leakage, and
repair it if necessary.
b. De fe c ti ve t he r mo st a t Rep la c e.
c. Malfunction of water pump Replace.
d. Clogged engine coolant passage Clean.
e. Improper ignition timing
Inspect and repair ignition control system.
Procedure.>
f. Clogged or leaking radiator Clean, repair or replace.
g. Improper engine oil in engine coolant Replace engine coolant.
h. Air/fuel mixture ratio too lean
Inspect and repair the fuel injection system.
Procedure.>
i. Excessive back pressure in exhaust system Clean or replace.
j. Insufficient clearance between piston and cylinder Adjust or replace.
k. Slipping clutch Correct or replace.
l. Dragging brake Adjust.
m. Faulty transmission gear oil Replace.
n. Malfunction of radiator fanInspect the radiator fan relay, engine coolant tempera-
ture sensor or fan motor and replace them.
Over-coolinga. Ambient temperature extremely low Partly cover radiator front area.
b. De fe c ti ve t he r mo st a t Rep la c e.
Engine coolant
leaks
a. Loosened or damaged connecting units on hoses Correct or replace.
b. L ea k ag e f r o m wat e r pu mp Rep la c e.
c. Leakage from water pipe Correct or replace.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crankcase Correct or replace.
f. Damaged or cracked ther mostat case Correct or replace.
g. Leakage from radiator Correct or replace.
Strange noise
a. Defective drive belt Replace.
b. De fe c ti ve ra di a t or fan Rep la c e.
c. Defective water pump bearing Replace water pump.
d. Defective water pump mechanical seal Replace water pump.
Page 1559 of 2453
EX(H6DO)-5
Front Exhaust Pipe
EXHAUST
B: INSTALLATION
1) Install the front oxygen (A/F) sensor and rear ox-
ygen sensor.
Sensor.>
2) Install the front exhaust pipe (RH) to front ex-
haust pipe assembly.
NOTE:
Use a new gasket.
Tightening torque:
30 N·m (2.5 kgf-m, 22.4 ft-lb)
3) Install the front exhaust pipe assembly to vehi-
cle.
4) Temporarily tighten the bolts which hold front ex-
haust pipe assembly to hanger bracket.
5) Install the nuts to cylinder head which hold front
exhaust pipe.
Tightening torque:
30 N·m (2.5 kgf-m, 22.4 ft-lb)
6) Install the under cover.
7) Tighten the bolts which install front exhaust pipe
to rear exhaust pipe.
Tightening torque:
18 N·m (2.5 kgf-m, 13.0 ft-lb)
8) Tighten the bolts which hold front exhaust pipe
assembly to hanger bracket.
Tightening torque:
35 N·m (2.5 kgf-m, 26.0 ft-lb)
9) Connect the front oxygen (A/F) sensor connec-
tor (A) and rear oxygen sensor connector (B).
10) Lower the vehicle.
11) Connect the ground cable to battery.
C: INSPECTION
1) Check the connections and welds for exhaust
leaks.
2) Make sure there are no holes or rusting.
EX-02017
EX-00061
EX-02016
EX-02015
EX-00061
EX-02014
(A)
(B)
Page 1875 of 2453
ME(H6DO)-9
General Description
MECHANICAL
(1) Rocker cover (RH) (16) Cylinder head (RH) (31) Exhaust camshaft cap (Front LH)
(2) Oil switching solenoid valve (RH) (17) Gasket (32) Front camshaft cap (LH)
(3) Oil switching solenoid valve holder
(RH)
(18) Cylinder head gasket (RH) (33) Plug
(19) Oil switching solenoid valve (LH) (34) Oil pipe (LH)
(4) Oil switching solenoid valve gas-
ket
(20) Oil switching solenoid valve holder
(LH)
(35) Rocker cover (LH)
(5) Rear chain cover (21) Oil switching solenoid valve gas-
ket
Tightening torque: N·m (kgf-m, ft-lb)
(6) Oil pipe (RH)T1:
(RH)
(22) Cylinder head gasket (LH)
(23) Cylinder head (LH)T2:
(9) Intake camshaft cap (Rear RH) (25) Exhaust camshaft (LH)T3:
(11) Exhaust camshaft cap (Center
RH)
(27) Intake camshaft cap (Rear LH)T4:6.4 (0.65, 4.7)
(28) Intake camshaft cap (Center LH)T5: 9.75 (1.0, 7.2)
(12) Exhaust camshaft cap (Front RH) (29) Exhaust camshaft cap (Rear LH)T6:16 (1.6, 12)
(13) Front camshaft cap (RH) (30) Exhaust camshaft cap (Center
LH)
T7: 60 (6.1, 44)
(14) Intake camshaft (RH)T8: 29 (3.0, 21.4)
(15) Exhaust camshaft (RH)
Page 1920 of 2453
ME(H6DO)-54
Camshaft
MECHANICAL
B: INSTALLATION
1) Apply engine oil to camshaft journals, and install
the camshaft.
2) Install the camshaft cap.
(1) Apply liquid gasket sparingly to back side of
front camshaft cap as shown in the figure.
CAUTION:
Do not apply liquid gasket excessively. Apply-
ing excessively may cause excess gasket to
flow toward cam journal, resulting in engine
seizure.
Liquid gasket:
THREE BOND 1280B (Part No. K0877YA018)
Applying liquid gasket diameter:
2.0±0.5 mm (0.079±0.020 in)
(2) Apply engine oil to cap bearing surface, and
install the cap to camshaft.
(3) Tighten the rocker cover bolts in the numer-
ical order as shown in the figure.
Tightening torque:
(1) — (12): 16 N·m (1.6 kgf-m, 12 ft-lb)
(13) — (16): 9.75 N·m (1.0 kgf-m, 7.2 ft-lb)
3) Install the plugs.
Tightening torque:
60 N·m (6.1 kgf-m, 44 ft-lb)
4) Install the rocker cover.
(1) Apply liquid gasket sparingly to the mating
surface of cylinder head and rocker cover as
shown in the figure.
CAUTION:
Do not apply liquid gasket excessively. Apply-
ing excessively may cause excess gasket to
flow toward cam journal, resulting in engine
seizure.
Liquid gasket:
THREE BOND 1280B (Part No. K0877YA018)
•LH side
•RH side
ME-02057
ME-02058
(1)
(2)
(8)
(7)(9)
(3)
(4)
(5)
(6)
(10)
(11)(13)
(14)
(15)
(16)
(12)
ME-02055
ME-02059
ME-02060
Page 1921 of 2453
ME(H6DO)-55
Camshaft
MECHANICAL
(2) Tighten the rocker cover bolts in the numer-
ical order as shown in the figure.
Tightening torque:
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
•LH side
•RH side
5) Connect the oil pipe.
CAUTION:
•Be careful not to mistake the location of (A)
and (B).
•Be sure to use a new gasket.
Tightening torque:
(A), (B)
29 N·m (3.0 kgf-m, 652.27 cm-lb)
(C)
6.4 N·m (0.65 kgf-m, 4.7 ft-lb)
6) Install the rear chain cover.
7) Install the crank sprocket.
8) Install the cam sprocket.
9) Install the timing chain assembly.
10) Install the front chain cover.
11) Install the crank pulley.
C: INSPECTION
1) Measure the bend of camshaft. Repair or re-
place if bended.
2) Check the journal for damage and wear. Re-
place if faulty.
3) Measure the outside diameter of camshaft jour-
nal. If the journal diameter is not within specifica-
tion, check the oil clearance.
4) Measurement of the camshaft journal oil clear-
ance:
(1) Clean the bearing caps and camshaft jour-
nals.
(2) Place the camshafts on cylinder head.
(Without installing the valve rocker.)
(3) Place a plastigauge across each camshaft
journals.
(4) Install the bearing cap.
NOTE:
Do not turn the camshaft.
(5) Remove the bearing caps.
(A) Bolt without filter (with white mark)
(B) Bolt with filter (without white mark)
(C) Oil pipe bolt
ME-02061(2)
(7)(3)(1)(10)
(6)
(8)(4)
(5)
(9)
ME-02566
(8)(4)(1)
(5)
(7)
(9)(3)(2)
(6)
(10)
ME-02567
(A)
(C)
(B)
Camshaft journal
Front Except for front
Standard
mm (in)
37.946 — 37.963
(1.4939 — 1.4946)
25.946 — 25.963
(1.0215 — 1.0222)
ME-00539
Page 1923 of 2453
ME(H6DO)-57
Cylinder Head
MECHANICAL
20.Cylinder Head
A: REMOVAL
1) Remove the crank pulley.
2) Remove the front chain cover.
3) Remove the timing chain assembly.
4) Remove the cam sprocket.
5) Remove the crank sprocket.
6) Remove the rear chain cover.
7) Remove the camshaft.
8) Remove the cylinder head bolts in the numerical
order as shown in the figure.
Leave bolts (2) and (4) engaged by three or four
threads to prevent the cylinder head from falling.
9) While tapping the cylinder head with a plastic
hammer, separate it from cylinder block.
10) Remove the bolts (2) and (4) to remove cylin-
der head.
11) Remove the cylinder head gasket.
CAUTION:
Be careful not to scratch the mating surface of
cylinder head and cylinder block.
12) Similarly, remove the cylinder head (RH).
B: INSTALLATION
1) Install the cylinder head and gaskets on cylinder
block.
CAUTION:
•Use new cylinder head gaskets.
•Be careful not to scratch the mating surface
of cylinder head and cylinder block.
2) Tighten the cylinder head bolts.
(1) Apply a coat of engine oil to washers and
cylinder head bolt threads.
(2) Install the cylinder head to cylinder block,
and then tighten the bolts with torque of 20 N·m
(2.0 kgf-m, 14 ft-lb) in numerical sequence as
shown in the figure.
(3) Tighten the bolts with torque of 50 N·m (5.1
kgf-m, 37 ft-lb) in numerical sequence as shown
in the figure.
(4) Back off all the bolts by 180° in reverse order
of installation, and back them off again by 180°.
(5) Tighten the bolts with torque of 20 N·m (2.0
kgf-m, 14 ft-lb) in numerical sequence as shown
in the figure.
(6) Tighten the bolts (1) — (4) with torque of 48
N·m (4.9 kgf-m, 35.4 ft-lb) in numerical se-
quence.
(7) Tighten the bolts (5) — (8) with torque of 44
N·m (4.5 kgf-m, 33 ft-lb) in numerical sequence.
(8) Tighten all bolts 90° in the numerical order
as shown in the figure.
(9) Tighten the bolt (1) — (4) by 45° in the nu-
merical order.
3) Install the camshaft.
4) Install the rear chain cover.
5) Install the crank sprocket.
6) Install the cam sprocket.
7) Install the timing chain assembly.
(2)
(8) (6)
(5) (7)
(4)
(1)(3)
ME-02063
(2)
(8) (6)
(5) (7)
(4)
(1)(3)
ME-02063
(7)
(1) (3)
(4) (2)
(5)
(8)(6)
ME-02064
Page 1924 of 2453
ME(H6DO)-58
Cylinder Head
MECHANICAL
8) Install the front chain cover.
9) Install the crank pulley.
C: DISASSEMBLY
1) Set the cylinder head on ST.
ST 18250AA010 CYLINDER HEAD TABLE
2) Remove the valve lifter.
3) Set the ST on valve spring retainer. Compress
the valve spring and remove the valve spring re-
tainer key. Remove each valve and valve spring.
ST 499718000 VALVE SPRING REMOVER
NOTE:
Keep all the removed parts in order for re-installing
in their original positions.
CAUTION:
•Mark each valve to prevent confusion.
•Pay careful attention not to damage the lips
of intake valve oil seals and exhaust valve oil
seals.
D: ASSEMBLY
1) Installation of valve spring and valve:
(1) Set the cylinder head on ST.
ST 18250AA010 CYLINDER HEAD TABLE
(2) Coat the stem of each valve with engine oil
and insert the valve into valve guide.
NOTE:
When inserting the valve into valve guide, use spe-
cial care not to damage the oil seal lip.
(3) Install the valve spring and retainer.
NOTE:
•Be sure to install the valve spring with its close-
coiled end facing the seat on cylinder head.
•For the valve spring on intake side, install two of
them (inner and outer).
•Install the valve spring with the painted side fac-
ing to retainer.
(4) Set the ST on valve spring.
ST 499718000 VALVE SPRING REMOVER
(5) Compress the valve spring and fit the valve
spring retainer key.
(6) After installing, tap the valve spring retainers
lightly with a wooden hammer for better seating.
2) Apply oil to the surface of valve lifter and valve
shim.
3) Install the valve lifter and valve shim.
E: INSPECTION
1. CYLINDER HEAD
1) Make sure that no crack or other damages do
not exist. In addition to visual inspection, inspect
important areas using liquid penetrant tester.
Check that there are no marks of gas leaking or wa-
ter leaking on gasket installing surface.
2) Set the cylinder head on ST.
ST 18250AA010 CYLINDER HEAD TABLE
ST
ME-00545
(1) Seat
(2) Valve spring
(3) Retainer
(4) Painted face
(1)
(2)(3)
(4)
ME-00546
ST
ME-00545
Page 1944 of 2453
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.
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.
6) Remove the oil temperature 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.
3) Install the variable valve lift diagnosis oil pres-
sure switch.
4) Install the oil switching solenoid valve.
5) Connect the connector to oil switching solenoid
valve.
6) Install the air intake chamber.
ME-02071
ME-02072
ME-02073
(2)(1)
(5)
(4)
(3)
ME-02071
Page 1949 of 2453
ME(H6DO)-83
Engine Trouble in General
MECHANICAL
28.Engine Trouble in General
A: INSPECTION
NOTE:
The “RANK” shown in the chart shows the possibilities of the cause of trouble in order from “most likely” to
“rarely”.
A — Most likely
B — Sometimes
C — Rarely
Symptom Problem parts etc. Possible cause RANK
1. Engine does not start.
1) Starter does not turn. Starter Defective battery-to-starter harness B
Defective starter switch C
Defective inhibitor switch or neutral switch C
Defective starter B
Battery Improper connection of terminal A
Run-down battery A
Defective charging system B
Fr iction Seizure of crankshaft and connecting rod bear ing C
Seized camshaft C
Seized or stuck piston and cylinder C
2) Initial combustion does
not occur.
Starter Defective starter C
Engine control system
Fuel line Defective fuel pump and relay A
Lack of or insufficient fuel B
Chain Trouble B
Defective timing B
Compression Incorrect valve clearance C
Loosened spark plug or defective gasket C
Loosened cylinder head bolt or defective gasket C
Improper valve sealing C
Defective valve stem C
Wor n or broken valve spr ing B
Wor n or stuck piston r ings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
Tr o u b l e o f t a p p e t C
Tr o u b l e o f t a p p e t . I n c a s e n o i s e o c c u r s w i t h v a l v e m o v -
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
B
Page 1950 of 2453
ME(H6DO)-84
Engine Trouble in General
MECHANICAL
3) Initial combustion occurs. Engine control system
Intake system Defective intake manifold gasket B
Defective throttle body gasket B
Fuel line Defective fuel pump and relay C
Clogged fuel line C
Lack of or insufficient fuel B
Chain Trouble B
Defective timing B
Compression Incorrect valve clearance C
Loosened spark plug or defective gasket C
Loosened cylinder head bolt or defective gasket C
Improper valve sealing C
Defective valve stem C
Wor n or broken valve spr ing B
Wor n or stuck piston r ings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
Tr o u b l e o f t a p p e t C
Tr o u b l e o f t a p p e t . I n c a s e n o i s e o c c u r s w i t h v a l v e m o v -
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
B
4) Engine stalls after initial
combustion.
Engine control system
Intake system Loosened or cracked intake duct B
Loosened or cracked PCV hose C
Loosened or cracked vacuum hose C
Defective intake manifold gasket B
Defective throttle body gasket B
Dirty air cleaner element C
Fuel line Clogged fuel line C
Lack of or insufficient fuel B
Chain Trouble B
Defective timing B
Compression Incorrect valve clearance C
Loosened spark plug or defective gasket C
Loosened cylinder head bolt or defective gasket C
Improper valve sealing C
Defective valve stem C
Wor n or broken valve spr ing B
Wor n or stuck piston r ings, cylinder and piston C
Incorrect valve timing B
Improper engine oil (low viscosity) B
Tr o u b l e o f t a p p e t C
Tr o u b l e o f t a p p e t . I n c a s e n o i s e o c c u r s w i t h v a l v e m o v -
ing. Or the harness involved to oil switching solenoid
valve, variable valve lift diagnosis oil pressure switch
and variable valve lift has trouble in a past.
B
Symptom Problem parts etc. Possible cause RANK