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Pcv Valve Woes In The 4k


Tham

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Do those of you who own the KE70 with the 4K engine,

find that the PCV valve tends to be a source of trouble,

particularly in an aging engine with loose rings/valve seals

and burning quite a bit of oil ?

 

Moreover, the 4K, even when new, tends to have quite a

lot of blowby.

 

My engine suddenly started to idle a bit rough today, and

I suspected the PCV valve was clogging up again. This had

happened on quite a few occasions before, with the mechanic

scratching his head after checking the plugs, distributor,

carburettor, fuel pump, once even suspecing a burnt valve

on the 3rd cylinder, before finally unplugging the PCV, plugged

its inlet with his thumb, causing the engine to idle normally again.

 

So I pulled out the valve from its grommet in the head cover,

sprayed some Philips contact cleaner, followed by silicon spray

into its inlet, shook it a few times, and plugged it back in.

 

Initially it didn't appear to work, but I guess the sprays took some

time to loosen the spring-activated valve inside, and finally it

idled normally again after some time.

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