> Date: Sun, 27 Mar 94 16:08:44 GMT
> From: waddy@vsfl.demon.co.uk (Simon Waddington)
>
>...
> view mirror I was getting puffs of smoke as I changed gear (on the
> overrun). I discussed this with a friend and we decided it must be
> the valve guides which were worn and oil was being sucked in and
> burned off on the overrun. So just as I'm contemplating a head change
>...
Nope, the valve guides will cause it to smoke the most on start-up. It
sounds like rings to me. When you shift gears, there is a vacuum in the
cylinders which helps to draw the oil past the rings. That's why it doesn't
smoke under load, there is pressure in the cylinder preventing the oil from
getting past the rings.(as much) Under load, there is a stronger vacuum in
the intake ports due to the velocity of the flow, this would draw _more_ oil
from leaky valve guides.
>
> Ta,
Sorry for the bad news,
Kevin
(for your sake, I hope I'm wrong)
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