It was asked:
> What do people use at PCV Valves on the U20's... Did it originally have
> one?
The later R- and (I believe all) U- engines use crankcase ventilation,
but no PCV valve.
The stock air cleaner plate has internal tubes in the short venturi stacks
that create a slight suction as the air rushes into the engine. A hose
connects from the base plate to the fitting on the top of the valve
cover and creates a slight negative pressure in the crankcase.
The hose is NLA but a workaround is to use copper elbows and a
straight piece of high quality (emissions-rated) hose.
-- John
John F Sandhoff sandhoff@csus.edu Sacramento, CA
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