L26 engine, low mileage, but 15 years old:
When starting in the morning, misfires and spews out white smoke.
Pulling off spark plug leads, it appears that the cylinders 5 and 6 are
the guilty ones. But once the temperature guage reaches 1/4, the smoke
stops and it runs smoothly. So the white smoke usually means coolant
from a buggered gasket. Intake manifold gaskets are a common failure on
old GM3800 engines. But why only part-time problem? Is it possible that
when the engine is hot, the gap in the gasket is closed?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Kyle Einarsson <[email protected]> wrote:

L26 engine, low mileage, but 15 years old:
When starting in the morning, misfires and spews out white smoke.
Pulling off spark plug leads, it appears that the cylinders 5 and 6 are
the guilty ones. But once the temperature guage reaches 1/4, the smoke
stops and it runs smoothly. So the white smoke usually means coolant
from a buggered gasket. Intake manifold gaskets are a common failure on
old GM3800 engines. But why only part-time problem? Is it possible that
when the engine is hot, the gap in the gasket is closed?

Could be. Or maybe the block or manifold is cracked. You'll know once
you have it apart.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)