The Ford Barn

TinCup · 02-20-2017, 08:03 PM

I have lost the write up I found on adding a PCV valve to control blow by. It used some jeep parts if I remember. If anyone still has this conversion article and can share it will certainly be appreciated.

Mike V. Florida · 02-20-2017, 11:52 PM

From a long time ago,

https://www.fordbarn.com/forum/showpo...55&postcount=4

Special Coupe Frank · 02-21-2017, 07:50 AM

Is the (minimal) amount of scavenging through the PCV valve bleed and the 9/64" hole through the valve-cover bolt enough to effectively combat blow-by, especially on a tired engine ?

Ideally, the PCV draws through a 5/16" or 3/8" id tube, so when manifold vacuum drops and the PCV valve weight opens-up (high-load conditions, where blow-by will be greatest), the intake vacuum can draw a fair amount of volume off the crankcase.

When the load lessens or the engine is at idle, and vacuum is high, the PCV valve closes to a bleed, so that smooth idle is not destroyed.

While I am impressed with the engineering utilizing a drilled bolt to minimize the invasiveness of connecting the PCV draw to the valve chamber, I think it might function better to somehow have larger plumbing on the PCV draw.

Perhaps connecting the PCV via a rubber hose to a modified oil filler cap ?

Tom Wesenberg · 02-21-2017, 09:12 AM

Sponsored Links (Register now to hide all advertisements)

Keep the engine breathing stock.
If you feel the engine needs a PVC, it more likely needs to be rebuilt.

02-20-2017, 08:03 PM	#1
TinCup Senior Member Join Date: May 2010 Location: OKC / Tonkawa, Ok. Posts: 1,977	PCV Valve conversion I have lost the write up I found on adding a PCV valve to control blow by. It used some jeep parts if I remember. If anyone still has this conversion article and can share it will certainly be appreciated. __________________ Oklahoma City Model A Restorers Group.

02-20-2017, 11:52 PM	#2
Mike V. Florida Senior Member Join Date: May 2010 Location: South Florida Posts: 14,054	Re: PCV Valve conversion From a long time ago, https://www.fordbarn.com/forum/showpo...55&postcount=4 __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

02-21-2017, 07:50 AM	#3
Special Coupe Frank Senior Member Join Date: May 2010 Location: Northeast Penna Posts: 2,108	Re: PCV Valve conversion Is the (minimal) amount of scavenging through the PCV valve bleed and the 9/64" hole through the valve-cover bolt enough to effectively combat blow-by, especially on a tired engine ? Ideally, the PCV draws through a 5/16" or 3/8" id tube, so when manifold vacuum drops and the PCV valve weight opens-up (high-load conditions, where blow-by will be greatest), the intake vacuum can draw a fair amount of volume off the crankcase. When the load lessens or the engine is at idle, and vacuum is high, the PCV valve closes to a bleed, so that smooth idle is not destroyed. While I am impressed with the engineering utilizing a drilled bolt to minimize the invasiveness of connecting the PCV draw to the valve chamber, I think it might function better to somehow have larger plumbing on the PCV draw. Perhaps connecting the PCV via a rubber hose to a modified oil filler cap ?

02-21-2017, 09:12 AM	#4
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: PCV Valve conversion Sponsored Links (Register now to hide all advertisements) Keep the engine breathing stock. If you feel the engine needs a PVC, it more likely needs to be rebuilt.