350 PCV valve question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

spookylynx · 11-14-2015, 09:08 PM

Pretty rookie question, but then again... I'm new to this.

On my SBC 350 valve covers, is it better to do two breather caps? (one on each side) or one breather cap and a PCV valve back to the carb?

It's a '72 SBC 350, bored .30 over with an otherwise stock build, with Edelbrock Performer intake and carb.

Thanks

b454rat · 11-14-2015, 09:24 PM

One breather. One PVC on opposite side, going to the carb or intake.

cableguy0 · 11-15-2015, 01:30 AM

You absolutely need a pcv valve. Without it the engine will sludge up inside and turn the oil into a milkshake. Basically the pcv pulls the moisture and combustion gasses out of the engine. Pcv on one corner and the breather on the opposite corner allows for good air flow and will clear all the bad stuff out.

GRX · 11-15-2015, 04:12 PM

Yes indeed. The more worn the engine, the more blow by, the more important a properly working PCV system.

spookylynx · 11-19-2015, 07:42 PM

awesome that is what I needed to know

thanks

11-14-2015, 09:08 PM	#1
spookylynx Registered User Join Date: Mar 2013 Location: Vail, Colorado Posts: 163	350 PCV valve question Pretty rookie question, but then again... I'm new to this. On my SBC 350 valve covers, is it better to do two breather caps? (one on each side) or one breather cap and a PCV valve back to the carb? It's a '72 SBC 350, bored .30 over with an otherwise stock build, with Edelbrock Performer intake and carb. Thanks

11-14-2015, 09:24 PM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,454	Re: 350 PCV valve question One breather. One PVC on opposite side, going to the carb or intake. __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS

11-15-2015, 01:30 AM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: 350 PCV valve question You absolutely need a pcv valve. Without it the engine will sludge up inside and turn the oil into a milkshake. Basically the pcv pulls the moisture and combustion gasses out of the engine. Pcv on one corner and the breather on the opposite corner allows for good air flow and will clear all the bad stuff out. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

11-15-2015, 04:12 PM	#4
GRX Registered User Join Date: Jul 2010 Location: MD Posts: 1,937	Re: 350 PCV valve question Yes indeed. The more worn the engine, the more blow by, the more important a properly working PCV system.

11-19-2015, 07:42 PM	#5
spookylynx Registered User Join Date: Mar 2013 Location: Vail, Colorado Posts: 163	Re: 350 PCV valve question awesome that is what I needed to know thanks



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