Vaz -21213 Repair Manual page 11

1. Oil leaking through engine gaskets
2. Restricted crankcase ventilation system
3. Worn piston rings
4. Broken piston rings
5. Foul windows of oil scraper rings or foul slots in piston grooves due to
wrong oil
6. Worn or damaged valve oil caps
7. Badly worn valve stems or guides
1. Choke not fully opened
2. Excessive resistance to vehicle motion
3. Incorrect ignition timing
4. Defective distributor vacuum unit
5. High fuel level in carburettor:
- leaking needle valve or its gasket;
- seizure or excessive friction hindering normal float operation
6. Choked carburettor air jets
7. Leaking part throttle enrichment diaphragm
8. Carburettor solenoid failed to shut off fuel at overrun:
- no earthing of idle switch sliding contact;
- broken wire between control module and carburettor idle switch;
- faulty control module
Coolant temperature gauge needle is in the red sector. Start tracing the failure with checking coolant temperature gauge and its sender (Refer
to section «Instrumentation»).
1. Slackened pump and alternator drive belt
2. Insufficient coolant in system
3. Incorrect ignition timing
4. Dirty radiator outside
5. Defective thermostat
6. Faulty radiator cap inlet valve (opening pressure is below 0.07 MPa
(0.7 kgf/cm 2 )
7. Defective coolant pump
1. Damaged radiator
2. Damaged cooling hoses or pipe gaskets, loose clips
3. Leaking heater tap or heater matrix
4. Leaking water pump seal
5. Damaged radiator cap or cap seal
6. Defective cylinder head gasket
7. Leaks from fissures in cylinder block or cylinder head
8. Leaks from fissures in water pump housing, water jacket return pipe,
thermostat, expansion tank or intake pipe
Excessive oil consumption
1. Tighten fittings or replace gaskets and oil seals
2. Wash components of crankcase ventilation system
3. Rebore and renew pistons and rings
4. Renew rings
5. Clean windows and slots of carbon, change motor oil as recommended in
Attachment 4
6. Renew oil caps
7. Renew valves, repair cylinder head
Excessive fuel consumption
1. Adjust choke linkage
2. Check and adjust pressures in tyres, braking system, wheel alignment
3. Adjust ignition timing
4. Renew vacuum unit or ignition distributor
5. Carry out the following:
- check for any foreign matter entrapped between needle and valve seat;
renew valve or gasket as applicable;
- check and when necessary replace floats
6. Clean jets
7. Replace diaphragm
8. Following to be done:
- clean solenoid contact surfaces;
- check wiring and connections, renew damaged wire;
- renew control unit
Engine overheating
1. Adjust drive belt tension
2. Top up coolant to cooling system
3. Adjust ignition timing
4. Clean radiator outside with water jet
5. Renew thermostat
6. Renew cap
7. Check pump operation, renew or repair pump
Sudden coolant drop in expansion tank
1. Repair or renew radiator
2. Renew damaged hoses or gaskets, tighten hose clips
3. Renew tap or heater matrix
4. Renew seal
5. Renew cap
6. Renew gasket
7. Check cylinder block and cylinder head for leakage; renew damaged com-
ponents in case of evident cracking
8. Check for leaks; renew components in case of fissures; minor leaks can
be cured by adding a radiator sealant such as çààëë-1
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