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December 27, 2003
Paul....
Assuming you are using the normal
intake manifold mounted stock PCV
valve, most likely the rubber diaphragm
is "weak"....we all know what happens
to rubber exposed to ozone (air) either
sitting on a shelf in a parts wharehouse
or mounted on an engine which has sat
for a long period of time.
The high idle along with intermitten
excessive "smoking" is almost a dead
giveaway. Check that hose between
the flame arrester and the PCV valve
as well. Rubber develops "hairline"
cracks with age.
Like most rubber, it lasts longer when used (not abused) while exposed
to whatever fluids it was "built" to operate
with or within.
Fr'instance, brake system rubber seals
"like" exposure to the right hydraulic fluid.
If the connecting hose is in good order,
may I suggest you try a "new rubber"
NEW rubber diaphram in the intake manifold mounted PCV valve before you
decide "the hell with this" and go old
style "free vented".
The "early style" (<'68) simple PCV
system really works quite well when
operating normally and does a great
job of preventing oil seal leakage out
the rear of the engine (and other places),
so it's a nice thing to retain if you can
get the system to work as designed.
Cap'n. Bob
'60 :{)
PilotRob@... 27884
Posted on December 27, 2003 04:13 PM
Posted to category(s) Braking System | Cooling System | Cylinder Head | Engine (external) | Engine (internal) | Exhaust System | Gauges | Intake System | Lubrication System | Restoration
