my car gives smoke at the stime of starting why?

Answer 1

Two things come to mind... piston rings and valve seals.

You don't tell us how old or how many miles are on the car... that would help diagnose but I'll give you my $.02.

Piston rings: These rings seal the pistons against the cylinder walls. They make a metal to metal moving contact so oil must be present or they crash and burn. Metal parts shrink when they are cold and expand when they are hot. When these parts have shrunk, you have more clearance and more oil can get past the rings into the combustion chamber where it burns and makes a little smoke. When they expand, they seal off better and the problem diminishes or goes away.

Valve seals: These are little rubber seals sitting on each valve inside the head. Hard to get to little buggers as the valve spring forms a secure little cage around it. They are on both the intake and exhaust valves. The head is loaded with oil to lubricate all the moving parts of the valve train and sloshes everywhere. The valve seal keeps this oil from migrating too much down the valve stem where it can enter the combustion chamber. Leaking valve seals will allow oil to build up behind closed valves and literally drip into the combustion chamber on open valves. When you go to start the engine, this excess oil burns off and producest the smoke you see. Yes, the valve stems are leaking oil even when you are running but with a very low flow rate, you might not see the light smoke.

With the limited description, this should cover most smoking problems.

Good luck!

Answer 2

Take a look. Someone may have spilled a bit of oil on the engine that is smoking. Next time, open the hood and have someone else start the car.

Answer 3

hi there
if car is giving blackish smoke then u better check lubrication system either engine is being over lubricated or if ur car is old or had ran far distances engines pistons sometimes could not able to keep seal effect as desirable and either leak gas or draw lubricating oil upwards and thus burning it with gas
third possibility is just my guess but it could have been happened that oil filter needs to be replaced

Answer 4

I would never sleep with a prostitute, so no. Although instead of smoking, try vaping. After I started vaping (I use a crystal mini VGO2) I'd never touch a cigarette again. Plus it does a hell of a lot less harm that smoking cigarettes.

Answer 5

Sounds like valve stem/ guide seals - blue smoke

Answer 6

If it only does it when you start your engine, it's your valve guide seals. When your engine sets for a period of time oil drains past your valves from your into your cylinders, an burns off when you start your vehicle.

Answer 7

me too - here is my 2 cents

Where is the smoke coming from?
It could just be water vaporization from the exhaust... really - but if it continues to happen and it is white - well, what happened to me is it turned out the be the catylic converter needing replacement - it chopped itself up and took the muffler with it -- true!

Answer 8

yes, you are burning oil if it is blue smoke, could be bad piston rings or oil seeping by the valve seals, if it is more of a black or grey smoke it could be too rich of a mixture of gas and oxygen, check your carburetor or injectors for that..

Answer 9

What color is the smoke, black or blue grey, or even white? That can help give you a clue what's wrong.

Answer 10

car always letout smoke but may not be of visible colour to you..
so tell the colour of it and follow similar experienced car owners