timing belt ISUZU TF SERIES 2004 Owner's Manual

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-351
Step Action Value (s) Yes No
17
Check for the following engine mechanical problems
(refer to Engine Mechanical Section):

Low compression. -Leaking cylinder head gaskets.

Worn camshaft. -Sticking or leaking valves.

Valve timing. -Broken valve springs.

Camshaft drive belt slipped or stripped.
Was a problem found?
- Verify repair Go to Step 18
18
1. Check for faulty engine mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 19
19
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit
and/or system.
Was a problem found?
- Verify repair Go to Step 20
20
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 21
21
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

6E-354 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Step Action Value (s) Yes No
15
Check items that can cause the engine to run lean. Refer to
DTC P0171 "O2 Sensor System Too Lean (Bank 1)" or DTC
P0174 "O2 Sensor System Tool Lean (Bank 2)".
Was a problem found?
- Verify repair Go to Step 16
16
Check for proper ignition voltage output with the spark tester.
Was a problem found?
- Verify repair Go to Step 17
17
Check the ignition coils for cracks or carbon tracking. If a
problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 18
18
1. Remove the spark plugs and check for gas or oil fouling
cracks, wear, improper gap, burned electrodes, heavy
deposits, or improper heat range.
2. If spark plugs are fouled, the cause of fouling must be
determined before replacing the spark plugs.
Was a problem found?
- Verify repair Go to Step 19
19
Visually/physically check the vacuum hose for splits, kinks and
proper connections and routing.
Was a problem found?
- Verify repair Go to Step 20
20
Check the exhaust system for a possible restriction:

Damaged or collapsed pipes.

Internal muffler failure.
Was a problem found?
- Verify repair Go to Step 21
21
Check the torque converter clutch (TCC) for proper operation
(if A/T model). If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 22
22
Check for the following engine mechanical problems (refer to
Engine Mechanical Section):

Low compression.

Leaking cylinder head gaskets.

Worn camshaft.

Sticking or leaking valves.

Valve timing.

Broken valve springs.

Camshaft drive belt slipped or stripped.
Was a problem found?
- Verify repair Go to Step 23
23
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no malfunctions
have been found, review/inspect the following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit and/or
system.
Was a problem found?
- Verify repair Go to Step 24

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-367
Step Action Value (s) Yes No
10
Check for the following engine mechanical problems
(refer to Engine Mechanical):

Low compression.

Leaking cylinder head gaskets.

Worn camshaft.

Sticking or leaking valves.

Valve timing.

Broken valve springs.

Camshaft drive belt slipped or stripped.
Was a problem found?
- Verify repair Go to Step 11
11
Check the intake and exhaust manifold for casting
flash. Refer to Engine Mechanical.
Was a problem found?
- Verify repair Go to Step 12
12
1. Review all diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:

Visual/physical inspection.

Tech 2 data.

All electrical connections within a suspected circuit
and/or system.
Was a problem found?
- Verify repair Go to Step 13
13
Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the "SPS (Service Programming System)".
Was the problem solved?
- Verify repair Go to Step 14
14
Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual. Following
ECM programming, the Immobilizer system (if
equipped) must be linked to the ECM. Refer to section
11 “Immobilizer System-ECM replacement” for the
ECM/Immobilizer linking procedure.
- Verify repair -

ENGINE LUBRICATION (6VE1 3.5L) 6G-9
Oil Pump
Removal
1. Disconnect battery ground cable.
2. Drain engine oil.
3. Remove crankcase assembly.
 Refer to removal procedure for Oil Pan and
Crankcase in this manual.
4. Remove crankshaft pulley.
 Refer to removal procedure for Crankshaf
t
Pulley in this manual.
5. Remove timing belt.
 Refer to removal procedure for Timing Belt in
this manual.
6. Remove timing pulley from crankshaft.
7. Remove four fixing bolts from oil filter assembly.
8. Remove oil strainer fixing bolts, remove oil straine
r
assembly with O-ring.
9. Remove three bolts from oil pipe and O-ring.
10. Remove eight oil pump fixing bolts, then oil pump
assembly.
11. Remove sealant from mounting surface of oil pump
assembly, cylinder block and take care not to
damage mounting surfaces of oil pump and cylinde
r
block.
Installation
1. Install oil pump assembly
 Apply sealant (TB-1207B or equivalent) to the oil
pump mounting surfaces as shown in the
illustration.
 The oil pump assembly must be installed within
5 minutes after sealant application before the
sealant hardens.
NOTE: Do not apply sealant to the oil ports.




051RW002
 Use 5–8840–2287–0 installer when installing
new oil seal.
 Apply engine oil to oil seal lip.
 Install oil pump assembly to the cylinder block.
NOTE: Do not damage oil seal during installation of oil
pump assembly.





015RS001

6G-10 ENGINE LUBRICATION (6VE1 3.5L)
 Tighten fixing bolts to the specified torque.
Torque : 25 N




m (2.5 kg




m/18 lb ft)



051RW001
2. Install oil pipe with O-ring, tighten fixing bolt to the
specified torque.
Torque : 10 N




m (1.0 kg




m/7 lb ft)
3. Install oil strainer with O-ring, tighten fixing bolt to
the specified torque.
Torque : 25 N




m (2.5 kg




m/18 lb ft)
4. Install oil filter assembly and tighten bolts to the
specified torque.
Torque : 25 N




m (2.5 kg




m/18 lb ft)





050RW001
Legend
(1) Oil Pump
(2) Oil Filter
(3) Oil Gallery
(4) From Oil Filter
(5) To Oil Filter


5. Install timing pulley on crankshaft.
Install timing belt.
 Refer to installation procedure for Timing Belt in
this manual.
6. Install crankshaft pulley.
 Refer to install procedure for Crankshaft Pulley
in this manual.
7. Install crankcase assembly.
 Refer to installation procedure for Oil Pan and
Crankcase in this manual.
8. Refill engine oil until full level on engine oil dipstick.

ENGINE LUBRICATION (6VE1 3.5L) 6G-11
Oil Pump Oil Seal
Removal
1. Disconnect battery ground cable.
2. Drain engine oil.
3. Remove crankshaft pulley.
 Refer to removal procedure for Crankshaf
t
Pulley in this manual.
4. Remove timing belt.
 Refer to removal procedure for Timing Belt in
this manual.
5. Remove timing pulley from crankshaft.
6. Remove oil pump oil seal using a sealer puller.
NOTE: Take care not to damage sealing surfaces of oil
pump and crankshaft when removing oil seal.

Installation
1. Install oil pump oil seal, apply engine oil to oil seal
lip, then install oil seal using 5–8840–2287–0
installer.





015RS001
2. Install timing pulley to crankshaft.
3. Install timing belt.
 Refer to installation procedure for Timing Belt in
this manual.
4. Install crankshaft pulley.
 Refer to installation procedure for Crankshaf
t
Pulley in this manual.
5. Refill engine oil until full level.

6G-12 ENGINE LUBRICATION (6VE1 3.5L)
Main Data and Specifications
General Specifications

Item Specifications
Oil capacity 5.3 liters

Torque Specifications
Crankcase, Oil pan, Timing belt tensioner, Timing pulley, timing belt cover, Oil pump, Oil gallery, Oil strainer
N




m (kg




m/lb ft)




RTW46GLF000101

6-10 ENGINE DIAGNOSIS (C24SE)
Troubleshooting Procedure

Condition Possible cause Correction
Piston pin noise
(Piston makes noise each time it
goes up and down) Piston pin or piston pin hole worn Replace piston, piston pin and
connecting rod assy

Troubleshooting Procedure
The slapping sound stops when spark plug on bad
cylinder is shorted out.

Condition Possible cause Correction
Timing belt noise Timing belt tension is incorrect Replace pusher or adjust the
tension pulley or replace timing
belt
Tensioner bearing defective Replace
Timing belt defective Replace
Timing wheels defective Replace
Timing belt comes in contact with
timing cover Replace timing belt and timing
cover
Valve noise Valve and valve guide seized Replace valve and valve guide
Valve spring broken Replace
Valve seat off-positioned Correct
Crankshaft noise Crankshaft end play excessive
(noise occurs when clutch is
engaged) Replace thrust bearing
Engine knocking Preignition due to use of spark
plugs of inadequate heat range Install Spark Plugs of adequate
heat range
Fuel too low in octane rating Replace fuel
Wide Open Throttle enrichment
system failure Refer to Section 6E
Selection of transmission gear
incorrect Caution operator or incorrect gear
selection
Engine overheating Refer to "Engine Lacks Power"
Others Water pump defective Replace
V-belt slipping Adjust tension of V-belt or replace
V-belt

ENGINE MECHANICAL (C24SE) 6A-1
SECTION 6A
ENGINE MECHANICAL
CONTENTS
PAGE
General Description......................................................................................................... 6A- 4
ENGINE PICTORIAL .................................................................................................... 6A- 6
Main Data and Specification ........................................................................................... 6A-11
CRANKCASE VENTILATION SYSTEM ....................................................................... 6A-16
ENGINE ASSEMBLY & LOOSE PARTS ..................................................................... 6A-17
OPERATIONS ON ENGINE AGGREGATES .................................................................... 6A-18
Engine Damping Blocks(Engine without Transmission)......................................... 6A-18
Toothed Belt and Timing Check ............................................................................... 6A-21
Toothed Belt Tension, Adjust .................................................................................... 6A-23
Toothed Belt, Replace ................................................................................................ 6A-24
OPERATIONS ON INSTALLED ENGINE ......................................................................... 6A-26
Gasket, Exhaust Manifold, Cylinder Head ................................................................ 6A-26
Gasket, Intake Manifold, Cylinder Head .................................................................... 6A-26
Seal Ring, Camshaft Housing, Timing Side .............................................................. 6A-27
Seal Ring, Thermostat Housing, Cylinder Head ....................................................... 6A-27
Seal Ring - Front Camshaft Housing, Replace ......................................................... 6A-28
Toother Belt Rear Cover ............................................................................................. 6A-30
Toother Belt Tension Roller ....................................................................................... 6A-31
COMPONENT PARTS ...................................................................................................... 6A-32
Cylinder Head .............................................................................................................. 6A-32
Hydraulic Valve Lifter.................................................................................................. 6A-33
OPERATIONS ON CYLINDER HEAD AND CAMSHAFT HOUSING ............................... 6A-34
Camshaft...................................................................................................................... 6A-34
Camshaft Housing Removal and Installation ........................................................... 6A-35
Cylinder Head .............................................................................................................. 6A-35
Hydraulic Valve Lifers, Replace ................................................................................. 6A-37
Camshaft Housing, Replace....................................................................................... 6A-37

ENGINE MECHANICAL (C24SE) 6A-11
Main Data and Specifications
Engine - General C24SE
Engine type Four-cycle, water cooled cross-flow with single over head
camshaft
Micro-computer control, fuel injection
Combustion chamber type (Volume) Hemispherical (43.3cm3)
Timing train system Belt drive
No. of cylinders-bore
stroke mm (in) 4-87.5
100.0 (3.44
3.93)
Bore Spacing(C/L to C/L) 93.0 mm (3.66 in)
Firing Order 1-3-4-2
Bore
Stroke mm (in) 87.5
100.0 (3.44
3.93)
Total piston displacement cm3 (in3) 2,405(146.80)
Combustion Chamber Volume 43.3cm3
No. of piston ring Compression ring: 2, Oil ring: 1
Compression pressure kg/cm2 (psi/pa) 12.2-16.3 (174-232/1200-1600)
Ignition timing (BTDC) No adjustment
Idling speed: rpm(WO/AC,W/AC) A/C off 825
Valve clearances (At cold)
Intake mm (in) 0 (0) (Hydraulic valve lash adjustment)
Exhaust mm (in) 0 (0) ( " )
Open at (BTDC) deg 1730’
Close at (ABDC) deg 7630’
Exhaust valves
Open at (BBDC) deg 5830’
Close at (ATDC) deg 3530’
Ignition system Fully transistorized battery ignition
Distributor type Not applicable, Electronic Spark Timing control
Distributor advance type Not applicable, Electronic Spark Timing control
Spark plug type RN9YC4
Spark plug gap mm (in) 1.0--1.1 (0.039--0.043)
Lubrication system
Lubricating method Fully flow pressure circulation
Special engine oil (API grade) SE, SF, SG or SH grade
Oil pressure kg/cm2 (psi/Pa) rpm 4-4.6 (56.9-65.4/400-450)
Oil pump type Gear
Oil filter type Cartridge full flow
Oil capacity lit. (US/UK gal.) 4.25
Cooling system
Radiator type Corrugated fin with reserve tank
Coolant capacity lit.
(US/UK gal.) 2.3 (0.66/0.55)
Water pump type Centrifugal
Thermostat Wax pellet with jiggle hole