broken turbo

[Fredrik Skog]

On 18 Dec 1998, Tom Parker wrote:

> West, David <djwest at subcorp.com.au> wrote:
> 
> >If a turbo housing failed in some way near the oil galleries is it
> >true that you generally only get oil into the combustion chamber when
> >under vacuum conditions where as boost will pressurise the oil
> >galleries? Secondly, when this oil burns will it be mainly whitish
> >smoke? Thirdly, should this oil be present throughout the intake
> >manifold or is it fine enough mist that it is hard to detect.
> 
> I have had experiance with Minis sucking up oil through their crank case
> breather system. When a Mini with the right type of breathers goes hard round
> a corner the oil can get thrown into the breathers and it goes straight into
> the inlet manifold. If this happens you get huge clouds of white smoke. If the
> rings have gone, then you get blue smoke. 
> 
> I don't know about turbos, but large amounts of oil into the inlet manifold
> can produce white smoke.

I run my turbo engine without valve seals on the exhaust valves, because
they don't get enough lubrication othervise. On every startup this
produces a large cloud of white smoke due to oil running down the valve
shafts into the cylinder.


> --
> Tom Parker - tparker at nznet.gen.nz
>            - http://www.geocities.com/MotorCity/Track/8381/

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	Student at the Department of Computing Science Umeå University

Fredrik Skog			       E-mail: c95fsg at cs.umu.se
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