Opel Frontera UBS. Manual - part 371

SERVICE INFORMATION 00 – 7

3.

INSUFFICIENT POWER

Clogged air cleaner element

Clean or replace the air cleaner 
element

Air cleaner

Checkpoint

Possible cause

Correction

Water particle in the fuel

Replace fuel

Fuel

Clogged fuel filter element

Replace the fuel filter element or
the fuel filter cartridge

Fuel filter

Defective fuel feed pump

Repair or replace the fuel feed pump

Fuel feed pump

Injection nozzle sticking

Replace the injection nozzle

Injection nozzle

Injection nozzle injection starting pressure
too low
Improper spray condition

Adjust or replace the injectionn
nozzle

Fuel injection pipes damaged or obstructed

Replace the fuel injection pipes

Fuel injection pipes

Defective regulating valve

Repair or replace the regulating
valve

Injection pump

Defective delivery valve

Replace the delivery valve

Defective timer

Repair or replace the timer

Worn cam disk

Replace the cam disk

Improper control lever operation

Adjust or replace the control lever

Defective injection timing

Adjust the injection timing
Repair or replace the injection pump
timer

Weak governor spring

Replace the governor spring

Worn plunger

Replace the plunger saaembly

Worn cam disk

Replace the cam disk

00 – 8 SERVICE INFORMATION

Checkpoint

Possible cause

Correction

Booster compensator pipe broken or
cracked

Replace the booster compensator
pipe

Turbocharger

Exhaust gas leakage from the exhaust
system
Air leakage from the intake system

Repair or replace the related parts

Defective waste gate

Repair or replace the waste gare

Defective turbocharger assembly

Replace the turbocharger assembly

Blown out cylinder head gasket.  Worn 
cylinder liner.
Piston ring sticking between the valve and
valve seat

Replace the related parts

Compression
pressure

Valve clearance improperly adjusted

Adjust the valve clearance

Valve clearance

Valve spring weak or broken

Replace the valve spring

Valve spring

Exhaust pipe clogged

Clean the exhaust pipe

Exhaust system

Open and improperly set adjusting screw
seal

Adjust and reseal the adjusting
screw

Full load adjusting
screw seal

SERVICE INFORMATION 00 – 9

4.

EXCESSIVE FUEL CONSUMPTION

5.

EXCESSIVE OIL CONSUMPTION

Checkpoint

Possible cause

Correction

Engine oil

Engine oil unsuitable
Too mauch engine oil

Replace the engine oil
Correct the engine oil level

Oil seal and gasket

Oil leakage from the oilseal and/or the
gasket

Replace the oil seal and/or the
gasket

Air breather

Clogged air breather

Clean the air breather

Intake and exhaust
valve

Worn valve stems and valve guides

Replace the intake and exhaust
valves and the valve springs

Checkpoint

Possible cause

Correction

Fuel system

Fuel leakage

Repair or replace the fuel system
related parts

Air cleaner

Clogged air cleaner element

Clean or replace the air cleaner
element

Idling speed

Poorly adjusted idling speed

Adjust the idling speed

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

Adjust the fuel injection timing

Injection pump

Defective Delivery valve resulting is fuel
drippage after fuel injection

Replace the delivery valve

Turbocharger

Air leakage from the turbocharger intake
side

Repair the turbocharger intake side

Defective turbocharger assembly

Replace the turbocharger assembly

Valve clearance

Valve clearance improperly adjusted

Adjust the valve clearance

Compression
pressure

Blown out cylinder head gasket.  Worn
cylinder liner.
Piston ring sticking between the valve and
valve seat

Replace the related parts

Valve spring

Valve spring weak or broken

Replace the valve spring

00 – 10 SERVICE INFORMATION

6.

OVERHEATING

7.

WHITE EXHAUST SMOKE

Checkpoint

Possible cause

Correction

Fuel

Water particles in the fuel

Replace the fuel

Fuel injection timing

Delayed fuel injection timing

Adjust the fuel injection timing

Compression
pressure

Blown out cylinder head gasket.  Worn
cylinder liner. 
Piston ring sticking between the valve and
valve seat

Replace the related parts

Turbocharger

Defective turbocharger

Replace the turbocharger

Inlet and exhaust
valves
Valves seals

Defective valve seales.
Worn valves stems and valve guides

Replace the valve seales, the valves,
and the valve guides

Checkpoint

Possible cause

Correction

Cooling water

Insufficient cooling water

Replace the cooling water

Fan clutch

Oil leakage from the fan clutch

Replace the fan clutch

Fan belt

Fan belt loose or cracked causing slippage

Replace the fan belt

Radiator

Defective radiator cap or clogged radiator
core

Replace the radiator cap or clean the
radiator core

Water pump

Defective water pump

Repair or replace the water pump

Cylinder head and
cylinder body sealing
cap

Defective searing cap resulting in water
leakage

Replace the sealing cap

Thermostat

Defective thermostat

Replace the thermostat

Cooling system

Cooling system clogged by foreign
material

Clean the foreign material from the
cooling system

Fuel injection timing

Fuel injection timing improperly adjusted

Adjust the fuel injection timing