Why PCV
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
It won't hurt anything with the engine as long as you have some type of air filter there, and the hole is not sealed. If you have emissions inspections, they will fail you for that. Also make sure the vacuum line to the intake manifold is plugged.
Tuned
Joined: Mar 2004
Posts: 281
Likes: 1
From: Petersburg, MI
Why do you want to get rid of it? It works in conjunction with the breather filter. Manifold vacuum puts a slight vacuum on the engine through the pcv valve, air is "made up" in the engine through the breather filter on the opposite side. So with a properly operating pcv system the breather filter is filtering air before it enters the engine. If you get rid of the pcv valve then your engine will be at a positive pressure(especially if it's old and has blowby) and instead of filtering incoming air it will have oil and other crap from inside the motor coming out of it and will make a mess.
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
I'd put a filter on both sides of the engine, but it should work if at least one side is open. Just make sure there's a breather filter there, otherwise the oil could get a bunch of dirt in it.
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Senior User
Joined: Apr 2004
Posts: 368
Likes: 0
From: NH
pcv
some one told me that the pcv was also there to put a vacume on the crank case to aide in piston ring seal.is that true? 
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Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
A PCV is required to keep the combustion products and moisture out of the oil. Always run a PCV system. The system is easy to set up properly. Of course if you want your engine to rust and corrode inside eaten up by acids, and want to change your oil every thousand miles or every month etc you don't need one...
What "works" on a race car has very little to do with a street vehicle.
What "works" on a race car has very little to do with a street vehicle.
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
Originally Posted by Torque1st
What "works" on a race car has very little to do with a street vehicle.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Before the PCV engines lasted 25-50,000 miles, you changed oil every thousand miles and the engines were absolutely filthy inside.
Of course even with a PCV if you use Penzoil you need to scrape the sludge away... -hehe
Of course even with a PCV if you use Penzoil you need to scrape the sludge away... -hehe