Opel Frontera UBS. Service 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
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