Opel Frontera UBS. Manual - part 1257

SERVICE INFORMATION 00 – 11

8.

DARK EXHAUST SMOKE

Checkpoint

Possible cause

Correction

Air cleaner

Clogged air cleaner element

Clean or replace the air cleaner 
element

Injection nozzle

Injection nozzle injection starting pressure
too low 
Improper spray condition

Adjust or replace the injection
nozzle

Fuel injection timing

Fuel injection timing improperly adjusted

Adjust the fuel injection timing

Injection pump

Defective Delivery valve resulting is fuel
drippage after fuel injection

Replace the delivery valve

Excessive injection volume

Adjust the injection volume

9.

OIL PRESSURE DOES NOT RISE

Checkpoint

Possible cause

Correction

Engine oil

Improper viscosity engine oil.  Insufficient
engine oil

Replace the engine oil
Correct the engine oil volume

Oil pressure gauge
or unit
Oil pressure indicator
light

Defective oil pressure gauge or unit
Defective indicator light

Repair or replace the oil pressure 
gauge or unit
Replace the indicator light

Oil filter

Clogged oil filter element

Replace the oil filter element or the
oil filter cartridge

Relief valve and by-
pass valve

Relief valve sticking and/or weak by-pass
valve spring

Replace the relief valve and/or the
by-pass valve spring

Oil pump

Clogged oil pump strainer

Clean the oil pump strainer

Worn oil pump related parts

Replace the oil pump related parts

Rocker arm shaft

Worn rocker arm bushing

Replace the rocker arm bushing

Camshaft

Worn camshaft and camshaft bearing

Replace the camshaft and the
camshaft bearing

Crankshaft and
bearings

Worn crankshaft and bearings

Replace the crankshaft and/or the
bearings

00 – 12 SERVICE INFORMATION

10.

ABNORMAL ENGINE NOISE

Checkpoint

Possible cause

Correction

Fuel

Fuel unsuitable

Replace the fuel

1.  ENGINE KNOCKING

2.  GAS LEAKAGE NOISE

Exhaust pipes

Loosely connected exhaust pipes.  Broken
exhaust pipes

Tighten the exhaust pipe
connections
Replace the exhaust pipes

Check to see that the engine has been thoroughly warmed up before begining the troubleshooting 
procedure.

Fuel injection timing

Fuel injection timing improperly adjusted

Adjust the fuel injection timing

Injection nozzle

Improper injection nozzle starting pressure
and spray condition

Adjust or replace the injection
nozzle

Compression
pressure

Blown out head gasket
Broken piston ring

Replace the head gasket or the
piston ring

Injection nozzles
and/or glow plugs

Loose injection nozzles and/or glow plugs

Replace the washers
Tighten the injection nozzles and/or
the glow  plugs

Exhaust manifold

Loosely connected exhaust manifold and/or
glow plugs

Tighten the exhaust manifold
connections

Cylinder head gasket

Damaged cylinder head gasket

Replace the cylinder head gasket

3.  CONTINUOUS NOISE

Fan belt

Loose fan belt

Readjust the fan belt tension

Cooling fan

Loose coling fan

Retighten the cooling fan

Water pump bearing

Worn or damaged water pump bearing

Replace the water pump bearing

Alternator or vacuum
pump

Defective alternator or vacuum pump

Repair or replace the alternator or
the vacuum pump

Valve clearance

Clearance improperly adjust

Adjust the valve clearance

SERVICE INFORMATION 00 – 13

Checkpoint

Possible cause

Correction

4.  SLAPPING NOISE

Valve clearance

Valve clearance improperly adjusted

Adjust the valve clearance

Rocker arm

Damaged rocker arm

Replace the rocker arm

Flywheel

Loose flywheel bolts

Retighten the flywheel bolts

Crankshaft and
thrust bearings

Worn or damaged crankshaft and/or
thrust bearings

Replace the crankshaft and/or the
thrust bearings

Crankshaft and
connecting rod
bearings

Worn or damaged crankshaft and/or
connecting rod bearings

Replace the crankshaft and/or the
connecting rod bearings

Connecting rod
bushing and piston
pin

Worn or damaged connecting rod bushing
and piston pin

Replace the connecting rod bushing
and/or the piston pin

Piston and cylinder
liner

Worn or damaged piston and cylinder liner.
Foreign material in the cylinder.

Replace the piston and the cylinder
liner.

00 – 14 SERVICE INFORMATION

Condition

Possible cause

Correction

Engine overheating

Low coolant level

Replenish

Thermo unit faulty

Faulty thermostat

Faulty coolant unit

Clogged radiator

Faulty radiator cap

Low engine oil level or use of improper

engine oil

Damaged cylinder head gasket

Clogged exhaust system

Loose fan belt

Excessive fuel injected

Improper injection timing

Injection timing improper

Faulty thermostat

Faulty thermostat

Replace

Replace

Repair or replace

Clean or replace

Replace

Replenish or change oil

Replenish

Replace

Clean exhaust system or replace

faulty parts

Adjust

Adjust

Adjust

Replace

Replace

Thermo unit faulty

Replace

Engine overcooling

Too long engine

warm-up time

Adjust

ENGINE COOLING TROUBLE