MC using oil and fouling plug.

[Joshua Van Tol]

>it's not a hard job in itself - there is a tool for compressing the
>valve springs that is pretty much necessary.  The job will be easier on
>a bench (head off) but it's ok on the car.  It is hard to tell if the
>seals are seated properly when you put them in, but I guess mine worked
>out as they halved oil consumption.  there are these little clear
>plastic aids to installation you, will want to have a few on hand (they
>go over the top of the stem and prevetn damage to the seal).  You will
>want to have a way to keep the valves in place while doing the job,
>compressed air into the spark plug hole worked ok for me, I suspect even
>putting each cylinder at TDC would work, too.  The compressed air trick
>is cute because the piston will go to BDC under the pressure - and if
>the rings are really bad you'll hear air coming out in interesting
>places...

Keep in mind if you decide to replace the valve stem seals on the car 
that the usual cause of failure of these (and a problem in itself) is 
worn valve guides. I'd recommend on a higher milage car pulling the 
head, and having it rebuilt. Also, it pays to replace the exhaust 
studs at this point.
-- 
Joshua Van Tol -- josh at spiny.com