The Stovebolt Page Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Helping out ...


EVENTS

Check in for status!

Jump over to the Events Forum, to post events -- new ones or the ones we have been enjoying for some time.
Look to see what's been cancelled or postponed.

Encourage one another!

Stovebolt Site Search
 
Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
13 members (Justhorsenround, Frank50, Mike K, dougs, Napco Man, 1 invisible), 156 guests, and 1 robot.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums50
Topics120,988
Posts969,911
Members43,811
Most Online1,229
Jan 21st, 2020
Image Posting Policy
Previous Thread
Next Thread
Print Thread
Replacement PCV Valve
#1332748 Wed Nov 06 2019 01:52 PM
Joined: Feb 2019
Posts: 839
P
Phak1 Online OP
AD Addict
Having recently obtained a NOS Ventilator Assembly (3698844) for my ’59 235, I’m now looking to assemble the rest of the parts needed to complete the system. I’m not going to drive myself crazy looking for all of the original parts but instead I just want to get the system to function correctly. The ventilator assembly has a 1/4” female NPT thread. The original PCV valve has a 1/4” male NPT and it appears to have a tubing fitting on the other side. Its part number 1544935 as per diagram from RPO 417 sheet 1.00.

I’m looking for a replacement PCV valve that has 1/4” male NPT on the inlet side and a nipple for hose on the other. I think that would be the easiest option to hook this system up. But sizing the valve for the correct flow is my problem.

Any suggestions?

Attached Files
2365F187-50B8-438D-B118-03D4C66E2ECC.jpeg (182.01 KB, 136 downloads)
Last edited by Phak1; Wed Nov 06 2019 01:53 PM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Replacement PCV Valve
Phak1 #1332767 Wed Nov 06 2019 04:17 PM
Joined: Apr 2005
Posts: 1,773
R
Shop Shark
Military vehicles used a threaded PCV valve. Take a look at the Kaiser Willys catalog. They show a valve with a male pipe on one end and a female pipe on the other.
Fred

Re: Replacement PCV Valve
Phak1 #1332769 Wed Nov 06 2019 04:23 PM
Joined: Jun 2004
Posts: 8,221
W
Master Gabster
The small block Chevs from the mid 60's had a PCV valve on the back of the carb with 1/4in. pipe threads that screwed into the back of the 2 barrel carb.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Replacement PCV Valve
Phak1 #1332770 Wed Nov 06 2019 04:25 PM
Joined: Feb 2004
Posts: 21,021
H
Boltergeist
Check Ebay for "vintage PCV valve"- - - -there are dozens of them listed, and a lot of them have male NPT threads. Pay close attention to the direction of flow- - - -the NPT thread is the inlet side on the correct valve.
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Replacement PCV Valve
Phak1 #1332881 Thu Nov 07 2019 04:04 PM
Joined: Feb 2019
Posts: 839
P
Phak1 Online OP
AD Addict
I thank you all for your suggestions. I was hoping that some of our fellow ‘Bolters” may have run into this and solved this issue. I have looked at all of your suggestions and they would all work to make the connections, but the flow is what I am most concerned about. To much flow and the engine and wipers won’t work properly and too little the system won’t evacuate the vapors. I suppose I may have to be the guinea pig and experiment with different valves. On Deve’s site, his testing for PCV valves said he was looking for 1 to 3 Hg vacuum measured at the oil dip stick tube to get the proper flow.

As to the direction of flow, I suppose where the valve is mounted doesn’t matter as long as the direction of flow is correct. Some of the valves I have seen the direction of flow is toward the male NPT thread. In this case the valve could be mounted at the manifold.

Your thoughts would be appreciated!


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator

Moderated by  Woogeroo 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.4