Cooling System - Opel Zafira B MPV 2006 Owners Workshop Manual

Engine (continued)
Engine noises (continued)
Whistling or wheezing noises
D
Leaking inlet manifold or throttle body gasket - petrol models
(Chapter 4A)
D
Leaking exhaust manifold gasket or pipe-to-manifold joint
(Chapter 4A or 48)
D
Leaking vacuum hose (Chapter 4A, 48, 4C or 9)
D
Blowing cylinder head gasket (Chapter 2A, 28, 2C or 20)
D
Partially blocked or leaking crankcase ventilation system (Chap-
ter 4C)
Tapping or rattling noises
D
Worn valve gear or camshaft (Chapter 2A, 28, 2C or 20)
D
Ancillary component fault (coolant pump, alternator, etc) (Chap-
ter 3, 5A, etc)
Cooling system
Overheating
D
Insufficient coolant in system (see Weekly checks)
O
Thermostat faulty (Chapter 3)
D
Radiator core blocked, or grille restricted (Chapter 3)
D
Cooling fan or cooling module faulty (Chapter 3)
D
Inaccurate coolant temperature sensor (Chapter 3)
D
Airlock in cooling system (Chapter 1 A, 1 B or 3)
D
Expansion tank pressure cap faulty (Chapter 1 A or 1 B)
D
Engine management system fault (Chapter 4A, 48 or 4C)
Overcooling
D
Thermostat faulty (Chapter 3)
D
Inaccurate coolant temperature sensor (Chapter 3)
D
Cooling fan faulty (Chapter 3)
O
Engine management system fault (Chapter 4A, 48 or 4C)
Fuel and exhaust systems
Excessive fuel consumption
D
Air filter element dirty or clogged (Chapter 1 A or 1 B)
D
Fuel injection system fault (Chapter 4A or 48)
D
Engine management system fault (Chapter 4A, 48 or 4C)
D
Crankcase ventilation system blocked (Chapter 4C)
D
Tyres under-inflated (see Weekly checks)
D
Brakes binding (Chapter 1 A, 18 or 9)
D
Fuel leak, causing apparent high consumption (Chap-
ter 1A, 18, 4A, 48 or 4C)
Fault finding
REF•19
Knocking or thumping noises
D
Worn big-end bearings (regular heavy knocking, perhaps less
under load) (Chapter 2E)
D
Worn main bearings (rumbling and knocking, perhaps worsening
under load) (Chapter 2E)
D
Piston slap - most noticeable when cold, caused by piston/bore
wear (Chapter 2E)
D
Ancillary component fault (coolant pump, alternator, etc) (Chap-
ter 3, 5A, etc)
D
Engine mountings worn or defective (Chapter 2A, 28, 2C or 20)
D
Front suspension or steering components worn (Chapter 10)
External coolant leakage
D
Deteriorated or damaged hoses or hose clips (Chapter 1A or 1 B)
D
Radiator core or heater matrix leaking (Chapter 3)
D
Expansion tank pressure cap faulty (Chapter 1 A or 1 B)
D
Coolant pump internal seal leaking (Chapter 3)
D
Coolant pump gasket leaking (Chapter 3)
D
Boiling due to overheating (Chapter 3)
D
Cylinder block core plug leaking (Chapter 2E)
Internal coolant leakage
D
Leaking cylinder head gasket (Chapter 2A, 28, 2C or 20)
D
Cracked cylinder head or cylinder block (Chapter 2A, 28, 2C, 20
or2E)
Corrosion
D
Infrequent draining and flushing (Chapter 1 A or 1 B)
D
Incorrect coolant mixture or inappropriate coolant type (see
Weekly checks)
Fuel leakage and/or fuel odour
D
Damaged or corroded fuel tank, pipes or connections (Chapter 4A
or48)
D
Evaporative emissions system fault - petrol models (Chapter 4C)
Excessive noise or fumes from exhaust system
D
Leaking exhaust system or manifold joints (Chapter 1A, 18, 4A
or48)
D
Leaking, corroded or damaged silencers or pipe (Chap-
ter 1A, 18, 4A or 48)
D
Broken mountings causing body or suspension contact (Chap-
ter 1A, 1 B, 4A or 48)