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A bad PCV can actually give a multitude of different problems, ranging from hard starting (rare) to smoking, to poor mileage. PCV's are cheap and easy to replace, if in doubt, replace it.
 

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what exactly does the PCV valve do?
 

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As an engine runs, the gasses inside the combustion chamber leak past the rings. I don't care what motor, who built it or what ever, but NO engine is 100% sealed. These gasses travel down into the crankcase (where the crankshaft and stuff is). The PCV valve allows the engine to suck in a moderated amount of the gasses to return to the cumbustion chamber to be burnt. If you've ever shaken a PCV, you'll hear it rattle. It ain't broke, it's supposed to do that. There's a 'ball and spring' type set-up in there that meters how much gass goes by it. A stuck open valve could create a 'Rich' condition while a stuck closed valve could create a 'Lean' condition. Now my fingers are hurting, so thats' enuf of that.........
 

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Now exactly how often should the PCV's be changed on a second gen?
 

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they are basicly like a fuel filter ussally once a year or if you notice it goes bad.
 

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The PCV allows the crankcase of an engine to BREATHE. Pre early 1960's, the crankcase was vented to the outside air, via the tube that dumped under the engine. When emissions laws came into effect, that was stopped. The crankcase is now SEALED and the PCV allows the nasty contaminated air in the crankcase to be burnt and replaced with fresh outside air thru the crankcase breather inlet filter. If the crankcase was NOT VENTED, it could cause a massive pressure buildup which could cause major leaks at ALL the seals and gaskets. Change the PCV regularly. It is CHEAP INSURANCE and will help you engine live a long life. It will ALSO help you pass your emissions test easier.
I hope this helps.

GOOD LUCK :wink:
 

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thump186 said:
they are basicly like a fuel filter ussally once a year or if you notice it goes bad.
What are the symptoms of a bad PCV?? And does anyone know where I can find the part #? Also where at? IE; Autozone, PepBoys, etc,etc?
Thanks!
Tony :)
 
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