Thread: Crankcase Venting

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Does Anyone Know The Proper Pcv Setup For A 350 Chevy? Should The Engine Be Sealed,or Should A Pcv Valve Go On The Drivers Side With A Breather On The Passenger Side?? Ive Also Seen Them Run Each Side Down To The Headers. Im Gonna Use The Car More At The Strip,but It Will Be Street Driven Also From Time To Time.thanks Again!

run a pcv on either both sides or a pcv on one side and a vent cap on the other

Originally Posted by thesals

run a pcv on either both sides or a pcv on one side and a vent cap on the other

thesals, i dont believe 2 pcv valves will work.

http://www.clubhotrod.com/forums/att...&postid=100112

Yea I think with two you'd get half the efficency at best. It doesn't mater which side you have one on as long as the other side is vented.
I sure if I'm wrong you'll find out here.
Charlie

i've seen factory motors with 2 pcv valves and they run just fine.... they have one on each side and a non venting filler cap

Originally Posted by thesals

i've seen factory motors with 2 pcv valves and they run just fine.... they have one on each side and a non venting filler cap

you have to have a vent with a pcv valve or it will suck the gaskets out of the motor if you don't. i've never seen a motor with 2 of them, and i've changed a lot of them.

this is the only way i've ever seen them from the factory.

In order to have airflow from the crankcase thru the pcv valve, (or valves)and into the carburetor, the air has to come from somewhere. Without a vented fill pipe or vented fill cap or vented valve covers, where would the air come from????

1. Never seen two pcv valves on one engine.

2. Must have a breather for the crankcase somewhere.

3. If you try to flow crankcase gasses through both sides of a "v" arrangement engine at the same time, with or without a breather, you will have flow problems.

Thanks For The Pic Mike,that Is The Most Common Setup Ive Seen In Use On The Street.thanks To All For The Input,it Will Be A Great Help. Nick

Originally Posted by SMOKEDOG7142000

Thanks For The Pic Mike,that Is The Most Common Setup Ive Seen In Use On The Street.thanks To All For The Input,it Will Be A Great Help. Nick

truth is with pcv valves is about the only way to do it. you could use just 2 breathers , but that gets messy. you could do the exhaust thing but thats a lot of trouble to set up, and don't work all that well in town.

Yeah,i Did Have Big Doubts About How Well It Would Work In Town,stop N Go,not Very Well.thanks!