[Shotimes] Deposits on the backs of the valves?

[Bruce Malachuk]

Since day one of owning my 94 MTX it has always had deposits on the backs of
the valves down at the bottom where they seal. At first they were big thick
cone haped deposits of crap that over time I have since gotten down to a
manageable layer of crud. I've done 2-3 seafoam carbon cleanings and pissed
off my neighbors with the smoke screen, I've done numerous cans of berryman's
b-12 in the gas tank, I've done the race around at redline aof a few min to
get everything good and hot and hopefully knock some carbon and gunk free, all
of this to no real final solution to remove the stuff. I still have this black
chunky crap hanging on the backs of the valves. Now I know that I'm gonna see
some coating of junk in there, but this stuff is kinda heavy. Which brings me
to why I ask what I should be doing to remove it.

Right now my fully hot car hads the intake off and 4 of the 6 cylinders have
thier valves soaking in what appears to be boiling berrymans b12 that I
sprayed in there. I plan on letting this sit overnight and soak at which point
I will use a vacuum pump and 2gal pail that I modified to suck the remaining
berrymans out. Now I'm hoping this will disolve the deposits overnight and
I'll have nice clean valves in the morning on 4 of the 6. While watching
Mark's 60k video I saw the valve areas completely filled with berrymans or
similar cleaner, and I believe that the cylinders themsleves has significant
amounts in them too. Would filling the valve area to the top to soak also
break up anything stuck on the outter face of the injectors? And also could I
pour a few ounces of the liquid berrymans into each of the cylinders and let
that soak overnight? Provided that I pump them dry in the mornign before
putting the car back together?

I figure that the cylinders being filled up might leak some by the rings and
wash the walls clean which I would think would be not good, as well as
contaminating my fresh load of AMSoil 0w30 that I have in there, so I haven't
done that yet. But I was thinking about it, and wanted the thoughts from some
of you that might have tackled this yourselves in the past.

Bruce
94 Opal Frost MTX
93 Black ATX - winter beater then parts car :-)