1998 OPEL FRONTERA timing belt

6E–182
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Lack of Power, Sluggish or Spongy Symptom
StepNo Ye s Va l u e ( s ) Action
111. Check for an engine mechanical problem. Check
for low compression, incorrect or worn camshaft,
loose timing belt, etc. Refer to
Engine Mechanical.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 12
121. 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
Te c h 2 d a t a
Freeze Frame data/Failure Records buffer
All electrical connections within a suspected
circuit and/or system.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–184
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Rough, Unstable, or Incorrect Idle, Stalling Symptom
StepNo Ye s Va l u e ( s ) Action
91. Check for the following engine mechanical items.
Refer to
Engine Mechanical for diagnosis
procedures:
Low compression
Sticking or leaking valves
Worn camshaft lobe(s)
Camshaft drive belt slipped or stripped
Incorrect valve timing
Valves clearance
Broken valve springs
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 10
101. Check for faulty engine mounts. Refer to Engine
Mechanical
for inspection of mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 11
111. 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
Te c h 2 d a t a
Freeze Frame data/Failure Records buffer
All electrical connections within a suspected
circuit and/or system.
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6E–190
4JX1–TC ENGINE DRIVEABILITY AND EMISSIONS
Cuts Out, Symptom
StepNo Ye s Va l u e ( s ) Action
91. Injector Test
Operate the each injector by Tech 2 with the
ignition “ON” and check if the working noise
confirm.
2. If a problem is found, check the harness or replace
the injector.
Is the action complete?
—Verify repairGo to Step 10
101. Check the following engine mechanical items.
Refer to
Engine Mechanical for diagnosis
procedures:
Low compression
Sticking or leaking valves
Worn camshaft lobe(s)
Camshaft drive belt slipped or stripped
Incorrect valve timing
Broken valve springs
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 11
111. Check for faulty motor mounts. Refer to Engine
Mechanical
for inspection of mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
—Verify repairGo to Step 12
121. 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
Te c h 2 d a t a
Freeze Frame data/Failure Records butter
All electrical connections within a suspected
circuit and/or system
3. If a problem is found, repair as necessary.
Was a problem found?
—Verify repair
Contact
Te c h n i c a l
Assistance

6A–1
ENGINE MECHANICAL
ENGINE
CONTENTS
Engine Mechanical 6A. . . . . . . . . . . . . . . . . . . . . .
Engine Cooling 6B. . . . . . . . . . . . . . . . . . . . . . . . .
Engine Fuel 6C. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Electrical 6D1. . . . . . . . . . . . . . . . . . . . . . . .
Ignition System 6D2. . . . . . . . . . . . . . . . . . . . . . . . .
Starting and Charging System 6D3. . . . . . . . . . . . Driveability and Emissions 6E. . . . . . . . . . . . . . . .
Engine Exhaust 6F. . . . . . . . . . . . . . . . . . . . . . . . .
Engine Lubrication 6G. . . . . . . . . . . . . . . . . . . . . .
Engine Speed Control System 6H. . . . . . . . . . . .
Inducton 6J. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE MECHANICAL
CONTENTS
Service Precaution 6A–2. . . . . . . . . . . . . . . . . . . . . .
General Description 6A–3. . . . . . . . . . . . . . . . . . . . .
Engine Diagnosis 6A–4. . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Cover LH 6A–18. . . . . . . . . . . . . . . . .
Removal 6A–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Cover RH 6A–21. . . . . . . . . . . . . . . . .
Removal 6A–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common Chamber 6A–24. . . . . . . . . . . . . . . . . . . . . .
Removal 6A–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Manifold LH 6A–26. . . . . . . . . . . . . . . . . . . . .
Removal 6A–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–26. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Manifold RH 6A–27. . . . . . . . . . . . . . . . . . . .
Removal 6A–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–27. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Pulley 6A–28. . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–28. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Belt 6A–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–30. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft 6A–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–33. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 6A–37. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–37. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Stem Oil Controller , Valve Spring and
Valve Guide 6A–39. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–39. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Piston, Piston Ring and Connecting Rod 6A–40. . . Removal 6A–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–41. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft and Main Bearings 6A–42. . . . . . . . . . . .
Removal 6A–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–43. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Oil Seal 6A–47. . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–47. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Assembly 6A–48. . . . . . . . . . . . . . . . . . . . . . . .
Removal 6A–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6A–48. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 6A–52. . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Associated Parts 6A–52. . . . .
Disassembly 6A–52. . . . . . . . . . . . . . . . . . . . . . . . . .
Clean 6A–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6A–53
. . . . . . . . . . . . . . . . . .
Reassembly 6A–53. . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Spring, Oil Controller, Valve,
Valve Guide 6A–56. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Spring, Oil Controller, Valve,
Valve Guide and Associated Parts 6A–56. . . . . . .
Disassembly 6A–56. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6A–57. . . . . . . . . . . . . . . . . .
Reassembly 6A–60. . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Clearance Adjustments 6A–61. . . . . . . . . . . . .
Camshaft 6A–63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft and Associated Parts 6A–63. . . . . . . . .
Disassembly 6A–63. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6A–64. . . . . . . . . . . . . . . . . .
Reassembly 6A–66. . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 6A–69. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft and Associated Parts 6A–69. . . . . . . .
Disassembly 6A–69. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6A–70. . . . . . . . . . . . . . . . . .
Inspection and Repair 6A–71. . . . . . . . . . . . . . . . . .
Reassembly 6A–73. . . . . . . . . . . . . . . . . . . . . . . . . .

6A–3
ENGINE MECHANICAL
General Description
Engine Cleanliness And Care
An automobile engine is a combination of many
machined, honed, polished and lapped surfaces with
tolerances that are measured in the thousandths of a
millimeter (ten thousandths of an inch). Accordingly,
when any internal engine parts are serviced, care and
cleanliness are important. Throughout this section, it
should be understood that proper cleaning and protection
of machined surfaces and friction areas is part of the
repair procedure. This is considered standard shop
practice even if not specifically stated.
A liberal coating of engine oil should be applied to all
friction areas during assembly to protect and lubricate
the surfaces on initial operation.
Whenever valve train components, pistons, piston
rings, connecting rods, rod bearings, and crankshaft
journal bearings are removed for service, they should
be retained in order.
At the time of installation, they should be installed in
the same locations and with the same mating
surfaces as when removed.
Battery cables should be disconnected before any
major work is performed on the engine. Failure to
disconnect cables may result in damage to wire
harness or other electrical parts.
The six cylinders of this engine are identified by
numbers; Right side cylinders 1, 3 and 5, Left side
cylinders 2, 4 and 6, as counted from crankshaft
pulley side to flywheel side.
General Information on Engine Service
The following information on engine service should be
noted carefully, as it is important in preventing damage
and contributing to reliable engine performance:
When raising or supporting the engine for any reason,
do not use a jack under the oil pan. Due to the small
clearance between the oil pan and the oil pump
strainer, jacking against the oil pan may cause
damage to the oil pick–up unit.
The 12–volt electrical system is capable of damaging
circuits. When performing any work where electrical
terminals could possibly be grounded, the ground
cable of the battery should be disconnected at the
battery.
Any time the intake air duct or air cleaner is removed,
the intake opening should be covered. This will
protect against accidental entrance of foreign
material into the cylinder which could cause extensive
damage when the engine is started.
Cylinder Block
The cylinder block is made of aluminum die–cast casting
for 75
V–type six cylinders. It has a rear plate integrated
structure and employs a deep skint. The cylinder liner is
cast and the liner inner diameter and crankshaft journal
diameter are classified into grades. The crankshaft is
supported by four bearings of which width of No.3 bearing
on the body side is different in order to support the thrust
bearing. The bearing cap is made of nodular cast iron and
each bearing cap uses four bolts and two side bolts.
Cylinder Head
The cylinder head, made of aluminum alloy casting
employs a pent–roof type combustion chamber with a
spark plug in the center. The intake and exhaust valves
are placed in V–type design. The ports are cross–flow
type.
Va l v e Tr a i n
Intake and exhaust camshaft on the both side of banks
are driven through an camshaft drive gear by timing belt.
The valves are operated by the camshaft and the valve
clearance is adjusted to select suitable thickness shim.
Intake Manifold
The intake manifold system is composed of the aluminum
cast common chamber and intake manifold attached with
six fuel injectors.
Exhaust Manifold
The exhaust manifold is made of nodular cast iron.
Pistons and Connecting Rods
Aluminum pistons are used after selecting the grade that
meets the cylinder bore diameter. Each piston has two
compression rings and one oil ring. The piston pin is made
of chromium steel is offset 1mm toward the thrust side,
and the thrust pressure of piston to the cylinder wall varies
gradually as the piston travels. The connecting rods are
made of forged steel. The connecting rod bearings are
graded for correct seze selection.
Crankshaft and Bearings
The crankshaft is made of Ductile cast–iron. Pins and
journals are graded for correct size selection for their
bearing.
Engine Lubrication
The oil discharged by a trochoid–type oil pump driven by
the crankshaft is fed through full–flow oil filter and to the oil
gallery provided under the crankshaft bearing cap. The oil
is then led to the crankshaft journals and cylinder head.
The crank pins are lubricated with oil from crankshaft
journals through oil holes. Also, an oil jet is fed to each
cylinder from crankshaft juornals on the connecting rod
for piston cleaning. The oil pan flange is dealed with liquid
packing only; do not deform or damage the flange surface
during removal or installation.

6A–12
ENGINE MECHANICAL
ConditionPossible causeCorrection
Noise from connecting rods or from
connecting rod bearings
(Faulty connecting rods orBearing or crankshaft pin wornReplace connecting rod bearings
and crankshaft or regrind crankshaft
pin and install the undersize bearing
yg
connecting rod bearings usually
make an abnormal noise slightly
higher than the crank bearing noise,
which becomes more evident when
Crankpin out of roundReplace connecting rod bearings
and crankshaft or regrind crankshaft
pin and install the undersize bearing
which becomes more evident when
engine is accelerated)Connecting rod bentCorrect or replaceg)
Connecting rod bearing seizedReplace connecting rod bearings
and crankshaft or regrind crankshaft
pin and install the undersize bearing
Troubleshooting Procedure
Abnormal noise stops when the spark plug on the cylinder
with defective part is shorted out.
Condition
Possible causeCorrection
Piston and cylinder noise
(Faulty piston or cylinder usually
kbidhil
Piston clearance increased due to
cylinder wearReplace piston and cylinder body
makes a combined mechanical
thumping noise which increasesPiston seizedReplace piston and cylinder bodyg
when engine is suddenly accelerated
but diminishes
gradually as thePiston ring brokenReplace piston and cylinder bodybut diminishes gradually as the
engine warms up)Piston defectiveReplace pistons and others
Troubleshooting Procedure
Short out each spark plug and listen for change in engine
noise.
Condition
Possible causeCorrection
Piston pin noise
(Piston makes noise each time it
goes up and down)Piston pin or piston pin hole wornReplace piston, piston pin and
connecting rod assy
Troubleshooting Procedure
The slapping sound stops when spark plug on bad
cylinder is shorted out.
Condition
Possible causeCorrection
Timing belt noiseTiming belt tension is incorrectReplace pusher or adjust the tension
pulley or replace timing belt
Tensioner bearing defectiveReplace
Timing belt defectiveReplace
Timing pulley defectiveReplace
Timing belt comes in contact with
timing coverReplace timing belt and timing cover
Valve noiseValve clearance incorrectReplace adjusting shim
Valve and valve guide seizedReplace valve and valve guide
Valve spring broken or weakenedReplace
Valve seat off–positionedCorrect
Camshaft worn outReplace
Crankshaft noiseCrankshaft end play excessive
(noise occurs when clutch is
engaged)Replace thrust bearing

6A–19
ENGINE MECHANICAL
Legend
(1) Crankshaft Pulley
(2) Generator
(3) Auto Tensioner
(4) Idle Pulley
(5) Cooling Fan Pulley
(6) Power Steering Oil Pump
(7) Drive Belt
(8) Air Conditioner Compressor
12. Remove power steering oil pump pulley.
13. Remove fan pulley and bracket assembly.
14. Remove idle pulley assembly.
15. Remove auto tensioner assembly.
16. Remove crankshaft pulley using 5–8840–0133–0
crankshaft holder.
17. Remove timing belt covers from the right bank side to
the left bank side in order.
18. Remove ignition coil assemblies for the left side bank.
060RW018
Legend
(1) Ignition Coil Connectors
(2) Bolts
(3) Ignition Coil Assemblies
19. Remove cylinder head cover assembly.
Installation
1. Install cylinder head cover.
Clean the sealing surface of cylinder head and
cylinder head cover to remove oil and sealing
materials completely.
Apply sealant (TB-1207B or equivalent) of bead
diameter 2-3 mm at eight place of arched area of
camshaft bracket on front and rear sides.
The cylinder head cover must be installed within 5
minutes after sealant application to prevent
premature hardening of sealant.
014RW144
Tighten bolts to the specified torque.
Torque : 9 Nꞏm (0.9 Kgꞏm/78 lb in)
010RW008
2. Install ignition coil assemblies and tighten the fixing
bolts to the specified torque.
Torque : 4 Nꞏm (0.4 Kgꞏm/35 lb in)
3. Install timing belt covers from left bank side to right
bank side, and tighten the fixing bolts and nut to the
specified torque.
Torque : 19 Nꞏm (1.9 Kgꞏm/14 lb ft)
4. Install crankshaft pulley and tighten the fixing bolt
using 5–8840–0133–0 crankshaft holder to the
specified torque.
Torque : 167 Nꞏm (17.0 Kgꞏm/123 lb ft)

6A–22
ENGINE MECHANICAL
16. Remove timing belt covers for right bank side.
17. Reomve timing belt covers for right bank side.
060RW001
Legend
(1) Ignition Coil Connectors
(2) Bolts
(3) Ignition Coil Assemblies
18. Remove ignition coil assemblies for the right side
bank.
19. Remove cylinder head cover assembly.
Installation
1. Install cylinder head cover.
Clean the sealing surface of cylinder head and
cylinder head cover to remove oil and sealing
materials completely.
Apply sealant (TB-1207B or equivalent) of bead
diameter 2-3 mm at eight place of arched area of
camshaft bracket on front and rear sides.
The cylinder head cover must be installed within 5
minutes after sealant application before the sealant
hardens.
014RW143
Tighten bolts in turn to the specified torque.
Torque : 8.8 Nꞏm (0.9 Kgꞏm/78 lb in)
010RW007
2. Install ignition coil assemblies and tighten the fixing
bolts to the specified torque.
Torque : 4 Nꞏm (0.4 Kgꞏm/35 lb in)
3. Install timing belt cover and tighten the fixing bolts and
nut to the specified torque.
Torque : 19 Nꞏm (1.9 Kgꞏm/14 lb ft)
4. Install crankshaft pulley and tighten the fixing bolt
using 5–8840–0133–0 crankshaft holder to the
specified torque.
Torque : 167 Nꞏm (17 Kgꞏm/123 lb ft)
5. Install auto tensioner assembly and tighten the fixing
bolts to the specified torque.
Torque :
Shorter Bolt : 20 Nꞏm (2.0 Kgꞏm/14.8 lb ft)
Longer Bolt : 39 Nꞏm (4.0 Kgꞏm/28.8 lb ft)