Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have purchased a second hand maruti 800(1996 model) car and is in good running condition, but black smoke is coming out from the engine. I took to mechanic and he said that, the black smoke coming out of the engine is due to failure of one cylinder and need to be go for changing cylinder and overhauling the cylinder head. Is it black smoke is due to failure of one of engine cylinder?

share|improve this question
Do you know why your mechanic thinks there is a problem with one of the cylinders? Did he do any tests that you know of? Cylinder is a fairly vague term, did he give you any other specifics? Can you pinpoint where the smoke is coming from? – Seminecis Sep 4 '13 at 11:11

If your 3-cylinder, ~800cc engine was only running on 2 cylinders, I would not think that anyone would describe it as being in "good running condition".

Black smoke from a gasoline engine is generally unburned fuel. This can be due to a variety of causes.

If the smoke is coming from the exhaust pipe, the problem could possibly be resolved by a simple tune-up (maybe a clogged air filter, bad spark plug, problem with the fuel delivery system, etc).

If the smoke is coming from the engine itself, then a tune-up is not sufficient--you likely have a leaking or blown gasket, either exhaust manifold gasket or head gasket.

However, the source of the problem may be deeper still, and it may be possible that cylinder head work is required.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.