More information on exhaust repairs
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Signs of exhaust problems
- Unusual noises such as rattling, hissing, etc
- A strong smell of exhaust fumes inside your car
- Any visible damage, or rust on the exhaust system itself
- Noticeable decrease in fuel efficiency/consumption
Colours of an exhaust smoke
Possible indications and problems
Blue smoke
Blue smoke is a sign of burning in the engine, this is often due to worn seals, piston rings, a faulty PCV valve (positive crankcase ventilation).
White smoke
White exhaust smoke could suggest a coolant leakage which means the coolant inside the engine, or condensation. This can be due to a blown head gasket, cracked cylinder head, a cracked engine block etc.
Black smoke
This usually indicates to an overly rich fuel mixture, or burning oil.
Excessive thick smoke
This can indicate to a possible blown head gasket, cracked cylinder head, engine damage etc. This can be a severe problem and if left untreated, this could lead to overheating and further engine damage and more costs if not addressed promptly.