How To Rebuild Your Ford V-8 351C-351M-400-429-460.pdf - Index of

One valve can be saved and the other can't. Backside of intake valve is so badly carboned
that air flow to its cylinder was reduced 20%. That means the engine's performance was
also reduced. Because its stem wear was within acceptable limits, a good cleaning and
refacing put it back into shape. Burned exhaust valve was discarded.
Get the gasket surfaces clean, right down
to bare metal. This is necessary for good
gasket sealing.
their components on heads still installed
on their engines. The C-type compressor
is easier to use on the bench because it
straddles the head and pushes on the
valve head and spring retainer simultaneously.
This forces the spring into a
compressed position while the valve stem
projects out of the spring retainer so the
keepers can be installed or removed.
Loosening Sticky Keepers-When compressing
valve springs, you'll probably encounter
sticky keepers. The trick here is
to place the head right-side-up on your
bench with a small block of wood under
the head of the particular valve. Using a
9116-inch, 318-inch-drive deep socket as a
driver* Place the socket
Over the
Valve tip and On the retainer. A sharp
on the socket with your soft-faced mallet
will not only break loose the spring-retainer
keepers, it may pop them out as
well, releasing the retainer and spring. If
you're lucky you won't have to use a
spring compressor. If this method doesn't
work 100%-it won't-you'll have to revert
to the spring compressor and finish
removing the keepers.
With the keepers out of the way and in
a container where they won't get lost,
you can release the pressure on the spring
and remove the retainer and spring-if
you're using a compressor. Slide the valve
out of its seal and valve guide. This may
not be as easy as it sounds. There's usually
a burr around the tip of each valve which
can cause a valve to hang up in its guide
as it's being removed. This being the case,
use a flat file to remove the burr by rotating
the at its head
bers the finishing touch.
k
1 14.p.-fL
I
/
-.+ ..
L-
exh
ombustion cha&rs a". intake and
big chunks and a wire 6rush gives the cham-
Cnec~lng neaa-surtace t~arness wlrn rnls precision bar and feeler gage. If a thicker than
2 file at an on the edge of the valve 0.006-inch-thick feeler gage fits between the bar and the head surface, resurface the
tip. To keep the valves in order, use head.