Exhaust pipe on one side is sooty

Maybe a minor air leak in the intake system on the leaner side? The
intake gaskets have a straight side & I've seen them suck in. Maybe a
loose hose clamp?

A leaking primer is also a possibility - as I recall they usually only
prime on one side.

A test would be to apprach under power, land and check immediately,
avoiding any taxi at low power & see if it is fouling at cruise. I'd
be concerned if the black stuff is generated on one side at cruise.

This calls for a compression check and a timing check on the engine.

wrote in message
oups.com...
This calls for a compression check and a timing check on the engine.


What would a timing check accomplish?

Mike
MU-2

"nrp" wrote in message
oups.com...
Maybe a minor air leak in the intake system on the leaner side?

That's a good point. Just because the symptom is on one side, that doesn't
mean that the problem isn't on the other.

Absolutely nothing. The man is a jerknose.

Jim



What would a timing check accomplish?

Mike
MU-2

Casey Wilson wrote:

I'm talking about soot in the pipe. Right side is dusty brownish -- left
side is black grimy.

Either burning or pumping oil. Check the plugs on those cylinders -- if the
ceramic is also black and sooty, that's the cylinder with the problem.
Compression tests are in order. If the black grime is deamp and smeary, suspect
a broken ring.

George Patterson
Why do men's hearts beat faster, knees get weak, throats become dry,
and they think irrationally when a woman wears leather clothing?
Because she smells like a new truck.