At 11:36 PM 11/4/98 -0500, you wrote:
>Ed wrote:
>
>>...silly questions... MY turn! MY turn!!
>> Could someone please explain to me
>>just what the function of the PCV -valve-
>>is? Why is a 'valve' needed?
>> I understand that the purpose is to pull
>>crankcase vapors back thru the intake to
>>be burned with the fuel charge; but, why
>>do we need this valve? Why not just an
>>open hose from the crankcase vent to
>>the air cleaner?
>> Thanks
Aside from ecology reasons, the true function of the PCV we care about is
simple. It removes blow-by from the crankcase so the pressure doesn't
build up and cause oil leaks (like you find on all the LBC motors that have
had them removed). Older engines didn't use PCV valves, but had a draft
tube to suck vapors out of the crankcase when the car moves through the air.
Les Myer
67 Sprite (with PCV - still no oil leaks after 3 years)
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