lock ISUZU TROOPER 1995 Workshop Manual

6A 1-52 ENGINE (V6 3.2L DOHC AND SOHC)
OIL PUMP
7
2
•
4
3
5
Removal steps 1. Timing belt 2. Crankshaft timing pulley
3.
Oil pan
4. Oil pipe and rubber ring 5. Oil strainer and rubber ring
6. Oil cooler assembly
7. Oil pump
Installation steps To install, follow the removal steps in the reverse order.
Fig. 6A1-61
1••1 REMOVAL
1. Timing belt
• See "Timing Belt Removal and Installation".
2. Crankshaft timing pulley
3. Oil pan
• See "Oil Pan Removal and Installation".
4. Oil pipe and rubber ring
5. Oil strainer and rubber ring
6. Oil cooler assembly
7. Oil pump
• Remove sealant from mounting surfaces of oil
pump and cylinder block.
•
Take care not to damage mounting surfaces of
oil pump and cylinder block.
1••1 INSTALLATION
7. Oil pump (Fig. 6A1·62)
rEi1 • Apply sealant (TB-12078 or equivalent) to the
l:!!J oil pump mounting surface as shown in Fig.
6A1-62.
Do not apply sealant to the oil ports.
Fig. 6A1-62
I
~)
•

1®.1• Use special tool when installing new oil seal.
(Fig. 6A 1-63)
Fig. 6A1-63
OIL PUMP OIL SEAL
'
3
ENGINE (V6 3.2L DOHC AND SOHC) 6A 1-53
l'l::r.l :
Installer: J-39202
Apply
engine oil to the oil seal lip.
Install oil
pump assembly on the cylinder block.
NOTE:
Do not damage oil seal during installation of oil
pump assembly.
~~~· Tighten fixing bolts to the specified torque.
Torque
N·m (lb·ft) 18 (13)
NOTE:
Take care notto drop lip spring of oil seal during
oil pump reassembly.
6. Oil cooler assembly
5. Oil pipe and rubber ring
4.
Oil strainer and rubber ring
3. Oil pan
• See "Oil Pan Removal and Installation".
2. Crankshaft timing pulley
1. Timing belt
• See "Timing Belt Removal and Installation".
Removal steps 1. Timing belt 2. Crankshaft timing pulley 3. Oil pump oil seal
Installation steps To install, follow the removal steps in the reverse order.
Fig. 6A1-64

,): .. • T·
6A 1-58 ENGINE (V6 3.2L DOHC AND SOHC)
EJ REMOVAL
1. Engine assembly
• See "Engine Assembly
Removal and Instal-
lation".
2. Crankshaft pulley
3. Timing belt cover
4. Timing belt
5. Oil pan
6. Oil pipe and rubber ring
7. Oil strainer and rubber ring
8. Oil pump assembly
9. Crankcase side bolts
10.
Oil gallery
11. Flywheel
12.
Rear oil seal retainers
13.
Connecting rod caps
14.
Crankshaft main bearing caps
15.
Crankshaft and main bearings
1•+1 INSTALLATION
15. Crankshaft and main bearings
• Install main bearings in the cylinder block and
main bearing cap respectively. (Fig. 6A1-72)
r-r-'
II-
!:=
Upper and lower
#1,4
~
!::
E:
Upper
#2,3
Fig. 6A1-72
Lower
#2,3
1~1· Apply new engine oil to upper and lower main
bearings.
NOTE:
• Do not apply engine oil to the bearing back
faces.
• Make sure that main bearings are in correct
position.
• Install crankshaft with care.
• Apply engine oil to the thrust washer.
1•1• Install thrust washer on No.3 journal. Oil
grooves in thrust washer must face the
crankshaft. (Fig. 6A1-73) Fig.
6A1-73
14. Crankshaft main bearing caps
C1 • Apply engine oil to the thread and seating
L:::J surface of each bearing cap fixing bolt.
NOTE:
• Do not apply engine oil to the bearing back
faces.
• Install bearing caps in the order of numbers,
starting
with cylinder block front side.
~~~ • Tighten main bearing fixing bolts to the
specified torque.
Torque
N·m (lb·ft) I 39 (29)
• After tightening the bolts, make sure that the
crankshaft rotates
smoothly.
13. Connecting rod caps
• The cap number must be same as connecting
rod number.
1~1· Apply engine oil to the thread and sealing
surface of each nut.
~~~· Tighten nuts to the specified torque.
Torque
N·m (lb·ft) 54 (49)
• After tightening the nuts, make sure that the
crankshaft rotates
smoothly.
12. Rear oil seal retainers
• Remove oil on cylinder block and retainer
fitting surface.
~~~· Apply sealant (TB1207 or equivalent) to
retainer fitting surface, as shown in Fig. 6A 1-
74.
C1 • Apply engine oil to oil seal lip, and align a
El positioning pin hole< in the cylinder block with
that in the retainer.
~~~· Tighten retainer fixing bolts to the specified
torque.
Torque
N·m (lb·ft) 18 (13)
IIIII

Fig. 6A1-74
11. Flywheel
• Clean the tapped holes in the crankshaft.
• Remove oil on crankshaft and flywheel fitting
surface.
NOTE:
• Do not reuse the bolts.
•
Do not apply oil or thread lock to the bolts.
~~~ • Tighten bolts to the specified torque.
Torque
N-m (lb·ft) 54 (40)
10. Oil gallery
m • Clean contact surfaces of oil gallery and main
~ bearing.
D • Apply engine oil to oil gallery fixing bolts and
L:::J tighten bolts to the specified torque. (Fig. 6A 1-
75)
~~~ Torque N·m (lb·ft) 29 (22) -55° to 65°
9. Crankcase side bolts
• Cylinder block side bolts and tighten bolts in
order
to the specified torque. (Fig. 6A 1-75)
~~~ Torque N·m (lb·ft) 39 (29)
NOTE:
• Do not apply the oil to the bolts
0 :Oil gallery fixing bolts 0: Crankcase bolts
Fig. 6A1-75
ENGINE (V6 3.2L DOHC AND SOHC) 6A1-59
8. Oil pump assembly
• Remove oil on cylinder block and oil pump
mounting surface.
ll:JI• Apply sealant (TB12078 or equivalent) to the oil
pump mounting surface. (Fig. 6A1-76)
19Y·I •. Apply engine oil to seal lip.
Install oil
pump in the cylinder block, and
tighten fixing
bolts to the specified torque.
1~1 Torque N·m (lb·ft)
Fig. 6A1-76
7. Oil strainer and rubber ring
6. Oil pipe and rubber ring
5. Oil pan
18 (13)
• Remove oil on oil pan mounting surface, and
dry the surface.
~~~· Apply a proper wide bead of sealant (TB1207C
or equivalent) to the oil pan mounting surface.
The bead
must be continuous. (Fig. 6A1-77)
• Oil pan must be installed within 5 minutes after
sealant application.
~~~· Tighten fixing bolts to the specified torque.
Torque
N·m (lb·in) 10 (87)
4.3mm (0.17in.) width bead of sealant
Portions between bolt holes I Bolt hole portions
D
Fig. 6A1-77

NOTE:
• Do not reuse the bolts.
•
Do not apply oil or thread lock to the bolts.
~~~ • Tighten bolts to the specified torque.
Torque
N·m (lb·ft) 54 (40)
1. Transmission
• See "Transmission Removal and Installation"
in Section 7.
Fig. 6A1-79
ENGINE ASSEMBL V
ENGINE (V6 3.2L DOHC AND SOHC) 6A 1-61
U7 CAUTION
VI 1) When assembling the engine and transmission,
confirm that
dowels have been mounted in the
specified positions at the engine side. Besides,
take care that
dowel positions are different
between the
manual transmission and the
automatic transmission.
If assembled in the
condition that
dowels have not been mounted in
the specified positions,
it results in the trans­
mission broken.
M/Tdowel position
AIT dowe I Y~---...rr"lr-'1--' position
Fig. 6A1-79a
A/Tdowel position
Fig. 6A1-80

·-------------------------------------
ENGINE (V6 3.2L DOHC AND SOHC) 6A1-63
MAIN DATA AND SPECIFICATIONS
GENERAL SPECIFICATIONS
Items S pacifications
Engine type,
number of cylinders and Water-cooled, four cycle V6 vertical
arrangement
Form
of combustion chamber
Pent-roof type
Valve mechanism SOHC/DOHC belt drive
Cylinder liner type
Casted in cylinder block
Total
piston displacement
3165 cc
Cylinder bore X stroke 93.4mm X 77mm (3.677in X 3.031 in)
Compression ratio
SOHC: 9.3 DOHC: 9.8
Compression pressure
at
300rpm SOHC: 12.0kg/cm2 DOHC: 12.5kg/cm2
Engine idling speed rpm Non-Adjustable (750)
Valve clearance Non-Adjustable
Oil capacity SOHC: 6.0 liters DOHC:
6.0 liters
Ignition
timing Non-Adjustable (16.BTDC at Idle rpm)
Spark
plug FR2LS, BKR6E-11, K20PR-U11
FR3LS, BKR5E-11 I K16PR-U11
Plug gap 1.0-1.1 mm (0.03937in-0.043307in)

ENGINE COOLING 68-1
SECTION 68
ENGINE COOLING
CONTENTS
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1 Radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-7
Diagnosis........................................ 68-3 Drive Belt Adjustment . . . . . . . . . . . . . . . . . . . . 68-1 0
On-Vehicle Service............................ 68-4 Main Data and Specifications .............. 68-12
Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-4
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-6
Torque Specifications .................... 68-12
Special Tools ................................... 68-13
GENERAL DESCRIPTION
DOHC MODEL
Reserve tank
/ Radiator
SOHC MODEL
Radiator
Oil cooler
Throttle body
Fig. 68-1
Cylinder head
"'
RH Bank
' Cylinder bloc~~
Cylinder block
LH Bank
Cylinder block
~
lololol ~ I
~L: - -~,t
Cylinder head LH Bank d
d

68 - 4 ENGINE COOLING
ON-VEHICLE SERVICE
DRAINING AND REFILLING COOLING
SYSTEM
Before draining the cooling system, inspect the sys­
tem and perform any necessary service to ensure that
it is clean, does not leak and is in proper working
order. The Engine Coolant (EC) level should be be­
tween the "MIN" and "MAX" lines of reserve tank
when the engine is cold. If low, check for leakage and
add
EC up to the "MAX" line. There should not be any
excessive deposit of rust or scales around the radiator
cap
or radiator filler hole, and the EC should also be
free
from oil. Replace the EC if excessively dirty.
1. Completely drain the cooling system by opening
the drain petcock at the bottom of the radiator.
2. Remove the radiator cap.
W WARNING
To avoid the danger of being burned, do not
remove the cap while the engine and radiator
are still hot. Scalding fluid and steam can be
blown out under pressure.
3. Disconnect all hoses from the EC reserve tank.
Scrub and clean the inside of the reserve tank with
soap and water. Flush it well with clean water,
then drain it. Install the reserve tank and hoses.
WATER PUMP
3
j
2
4. Refill the cooling system with the EC using a
solution that is at least 50 percent antifreeze but no
more than 70 percent antifreeze.
5. Fill the radiator to the base of the filler neck.
Fill the EC reserve tank to "MAX" line when the
engine is cold.
6. Block the drive wheels and firmly apply the park­
ing brake.
Shift an automatic transmission to "P"
(Park) or a manual transmission to neutral.
7. Remove the radiator cap. Start the engine and
warm it up at 2,500 -3,000 rpm for about 30
minutes.
8. When the air comes out from the radiator filler
neck and the EC level has gone down, replenish
with the EC. Repeat this procedure until the EC
level does not go down. Then stop the engine and
install the radiator cap. Let the engine cool down.
9. After the engine has cooled, replenish with EC up
to the "MAX" line of the reserve tank.
10. Start the engine. With the engine running at 3,000
rpm, make sure there is no running water sound
from the heater core (behind the center console).
11. If the running water sound is heard, repeat steps 7
to 10.
Removal steps
1. Timing
belt 2. Idle pulley 3. Water pump assembly
4. Gasket
Installation steps To install, follow the removal steps in the reverse order.
Fig. 6B-7
•

'.,~-' r.
68-8 ENGINE COOLING
2. Radiator hose
• Disconnect inlet hose and outlet hose from the
engine.
3. Fan guide, lower
• Remove clips on both sides and the bottom
lock. (Fig. 68-13)
~ Cooling fan guide; lower
~
Clip
Fig. 68-13
4. Reserve tank hose
• Disconnect the hose from radiator.
5. Bracket
6. Radiator assembly
• Remove upward the radiator assembly with
hose, taking care not to damage the radiator
core
with a fan blade.
• Remove cushion rubbers on both sides at the
bottom.
~ INSPECTION
Radiator Cap
Measure the valve opening pressure of the pressuriz­
ing valve with a radiator filler cap tester. Replace the
cap
if the valve opening pressure is outside the
standard range (Fig. 68-14).
~;!v(~~i~ening pressure 88.3-117.7 (12.8-17.1)
l'i':'il Cap tester: J-24460-01
~ Adapter: J-33984-A
Check the
condition of the negative pressure valve in
the center
of the valve seat side of the cap. If consid­
erable rust
or dirt is found, or if the valve seat cannot
be
moved by hand, clean or replace the cap.
Negative
valve opening
pressure kPa (psi) 1.96-4.91 (0.28-0.71)
Fig. 68-14
Radiator Core
1. A bent fin may result in reduced ventilation and
overheating
may occur. All bent fins must be
straightened. Pay
close attention to the base of the
fin when it is being straightened.
2. Remove all dust, bugs and other foreign material.
Flushing the Radiator
Thoroughly wash the inside of the radiator and the
Engine
Coolant passages with cold water and mild
detergent. Remove all signs of scales and rust.
Cooling System Leakage Check
Use a radiator cap tester to force air into the radiator
through the filler neck at the specified pressure of 196
kPa (28.5 psi) with a cap tester:
• Leakage from the radiator
• Leakage from the coolant pump
• Leakage from the water hoses
• Check the rubber hoses for swelling.
rt:\1 Cap tester: J-24460-01
~ Adapter: J-33984-A
Fig. 68-15
•

68 -10 ENGINE COOLING
DRIVE BELT ADJUSTMENT
Power steering oil pump
Lock bolt
Bolt position
Adjuster
Crank
pulley
Crank; AC. Generator cooling fan
Crank;
Air Conditioning compressor
Crank; Power steering
oil pump
Air Conditioning compressor
Lock bolt Crank pulley
Fig. 68-17
(b!] INSPECTION
Check drive belts for wear or damage, and replace
with new ones as necessary. Check belts for tension,
and
adjust as necessary.
WCAUTION:
• Unlike the conventional V-type belt, auto ten­
sion
belt must use a belt tension gauge, if
possible, for its tension adjustment because
feel based adjustment may not lead to accu­
rate
belt tension.
Tension
readjustment of auto tension belt
should be made only once when V-type HM'
tension has dropped to 40 lb or less and polyV­
type's to 50 lb or less after the vehicle's total
running mileage of 621 miles.
As for air conditioning (A/C) compressor driv­
ing belt, it is difficult to use a belt tension
gauge.
Depress
belt with 98N (221b) and make sure
that slackness is in the range of0.315-0.472 in.
AC. Generator and cooling fan drive belt
Air Conditioning compressor drive belt
Fig. 68-18
Belt tension range to be targeted for cold setting.
Using a
Borrough drive belt tension gauge.
(I b)
Kind of Initial Tension at belt tension readjustment
AC generator & fan Poly V type 180 110 pulley drive belt ±10
±10
A/C compressor Poly V type 120
100
drive belt ±20
±20
Power steering
V-type HM 90 ±20 pump drive belt
•