PCV Valve plumbing...

Jeff_Lee · Posted: Sat Aug 18, 2018 3:00 pm Post subject: PCV Valve plumbing...

I am recreating the plumbing for the PCV valve on an early (51) M38.

The short nipple and 90 degree pipe fitting that comes off the manifold, what was the material they were made of - black iron, galv, or brass?? I can't tell from photos and the parts book doesn't specify.

If someone has an original set up, what is the length of the nipple coming off the manifold?

Thanks, Jeff
_________________
1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
Southeast Florida

wesk · Posted: Sat Aug 18, 2018 11:55 pm Post subject:

Bob Westerman has already done all the leg work on the M38 fording & vent system both early & late. He contributed a lot of it to the CJ3A page. We have some of it shared here.

In your case I strongly suggest you view all of Bob's documents and become familiar with both early & late systems. Then follow Bob's parts listing which marries the ORD 9 with the civvy parts market.

http://www.cj3a.info/sibling/cjv35u/evolution.html

http://www.cj3apage.com/index/m38.htm

http://www.gvrdeu.org/M38%20Service%20Manual/M38.Underwater.Ventilating.System.12.04.pdf

http://www.cj3a.info/sibling/m38vent/vent4.htm

There are a thousand or so technical photos in my mjeeps photo album. a very good reference library where you can find the answers to about 90% of the questions asked on these boards.

http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

From my M38 Fuel Sys sub-album:

_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

radtech · Member Joined: Aug 09, 2010 Posts: 183

The nipple is 1/4" black iron 1 1/2" long the elbow is 1/4" black iron.

wesk · Posted: Sun Aug 19, 2018 2:04 pm Post subject:

From Bob's paperwork parts list:

1 ELBOW, pipe, 90 deg, MI, glvd, 1/4 pipe thd (vent control valve to carburetor choke body nipple) WO-801447 304.5 M38 Parts ORD 9 SNL-G740 1955 1/4 galvanized 90deg elbow 1 between manifold and pcv valve

1 NIPPLE, PIPE, S, cd or zn-fin, style No. 2, RH hd, 1/4-18NPT 11/4 in (carburetor choke body to crankcase vent control valve elbow) 219621 304.5 M38 Parts ORD 9 SNL-G740 1955 1/1 x 1-1/4 steel nipple 1 intake manifold to elbow by pcv valve
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

radtech · Member Joined: Aug 09, 2010 Posts: 183

The nipple is 1/4" black iron 1 1/4" long the elbow is 1/4" black iron.

Jeff_Lee · Posted: Sun Aug 19, 2018 10:09 pm Post subject:

Wes, you always step in to save the day.
I had looked in my G-740 parts book, Miller's M38 book, paged thru your gallery a couple of times (always see something new, so not time wasted), searched the M forum directly and using GOOGLE. I found, and printed out the great Bob Westerman diagram for Early M38's Ventilation System, but none of it had the lengths and material type I was looking for...

Then I opened up the CJ3A page link you posted above to Bob's detailed ventilation "Parts Database", which had eluded me until then, and there it was looking at me - galvanized and 1 1/4" long!

Thanks again, and I am one step closer to getting her back on the road!
Jeff
_________________
1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
Southeast Florida

wesk · Posted: Sun Aug 19, 2018 10:41 pm Post subject:

Glad to help.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

Eades · Posted: Mon Aug 20, 2018 6:51 pm Post subject:

Here is what is on mine and some measurements. Actually I installed the fording valve (NOS) and 90 degree fitting but the other was there and bubba'd in differently.

_________________
Rick Eades
1951 M38 & 1967 M715

Jeff_Lee · Posted: Wed Aug 22, 2018 10:38 am Post subject:

That works Rick. Thanks for the photo.

Now I need to find the fording valve... without breaking the bank... again.

Jeff
_________________
1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
Southeast Florida

wesk · Posted: Wed Aug 22, 2018 11:47 am Post subject:

Try google searching Weatherhead Shut off valve
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

Jeff_Lee · Posted: Fri Aug 24, 2018 8:21 am Post subject:

Thanks Wes, will keep looking.
_________________
1951 M38 restoration project - Flightline Jeep MC 23923 DoD 6-51
1954 M-100 Trailer USMC Dunbar Kapple s/n M-750759 DoD 1-54
1947 Willys CJ2A - Harvest Green
1954 Ford F-100 Parts chaser - blueprinted Y-Block
Southeast Florida


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