1939-1940 Engine photo request

kration

Gear Grinder
Feb 8, 2024
11
Triad
First Name
Mar
Willys Model
  1. Other
Willys Year:
  1. Other
If anyone on the pre war section can provide a photo of the 1939-40 Engine intake manafold and the crankcase vent down tube it would be greatly appreciated !
 
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Most of my experience with these engines are from the Military models.. so I'm not up on different types of Intakes or other things that may be common to only the car engines.. Comparing the pic that Joe B posted and the one I posted here there are differences in the intakes.. can anyone elaborate..? earlier ? later ?

My end goal is finding the exhaust & intake manifolds as shown in this photo.. rebuildable carb/linkage would be a +

1940-americar-engine-ny.jpg
 
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I edited my comment above with some links to the most recent prices I could find. I try to price anything I sell at the going rate or a little less. It funds my parts purchases, or in this case, funds my wrong parts purchases. I bought this for my GPW but it already had one in a box of parts that came with it. It’s not F-marked so I assume it’s Willys part. If you’re interested I can post some pictures of it. That picture above is something I quickly grabbed from the g503 site. I also have the screen if you need it.
 
JABJEEP said:
I edited my comment above with some links to the most recent prices I could find. I try to price anything I sell at the going rate or a little less. It funds my parts purchases, or in this case, funds my wrong parts purchases. I bought this for my GPW but it already had one in a box of parts that came with it. It’s not F-marked so I assume it’s Willys part. If you’re interested I can post some pictures of it. That picture above is something I quickly grabbed from the g503 site. I also have the screen if you need it.
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As I'm new on this forum is there a PM msg function ? I ask because I didn't see one.. if not sure shoot me a pic.. I'm also looking for an early round edge intake without the vac or cast bosses..
 
kration said:
As I'm new on this forum is there a PM msg function ? I ask because I didn't see one.. if not sure shoot me a pic.. I'm also looking for an early round edge intake without the vac or cast bosses..
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I don’t have the intake manifold, but I’ll post a picture here later today or tomorrow (busy weekend). I’ll try to send you a private message later too.
 
To send a private, or direct, message, you just click on the screen name of the person and then click on start conversation. If you're too new you might have to have a certain amount of posts to be eligable, but I'm not sure about that. I just sent you one with the pictures. Yesterday the picture part of this website wasn't working, but apparently that got fixed.

For everyone watching, here's a picture of a long and short draft tube. I believe that the earlier ones were MA and pre-war 441 or Americar, but were replaced by the shorter version early in MB production until finally beging replaced with the PCV system. Be careful when installing these or the PCV adapter. Apparently there were a few different types and styles and the bolt length is critical. Too short of a bolt won't reach the block and too long of a bolt can bottom out and when overtightened (to try to get the cap tight and leak-free) can actually crack the block or push out the bottom of the hole into the water jacket (or cylinder, don't remember which).

I'll have to post a picture later, but the valve cover that goes with the draft tube actually has a little supporting bracket on it that prevents the tube from "swinging" like a pendulum. Other than the spot-welded bracket I can't see any difference between the valve cover for the draft tube or the one with the PVC fitting adapter.

IMG_1901.jpgIMG_1900.jpgIMG_1899.jpgIMG_1898.jpg
 
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JABJEEP said:
the valve cover that goes with the draft tube actually has a little supporting bracket on it that prevents the tube from "swinging" like a pendulum. Other than the spot-welded bracket I can't see any difference between the valve cover for the draft tube or the one with the PVC fitting adapter.
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It looks like the valve cover might differ based on the picture above, so you may be looking for one more unique part. I'm pretty sure the draft tube goes on the front end of the cover on the early WWII jeeps, but that picture upthread shows it on the rear end of the cover.

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" " I'm pretty sure the draft tube goes on the front end of the cover on the early WWII jeeps, but that picture upthread shows it on the rear end of the cover. " "
Yes, all they did in that pic is spin the cover around ..

I could use an exhaust pipe clamp like is on that photo coming off of the manifold..
 
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kration said:
all they did in that pic is spin the cover around
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I think there's a difference. The little bracket that keeps it from moving too far is spotwelded under the mounting hole. If you spun it around it would be on above the hole. There must be two versions of that cover with the bracket, plus the later cover without the bracket. I'm sure that it could be cut off and re-welded, but I just wanted to point out that there are some differences.
 
my engine was in a CJ2A and all the bolt on parts were the CJ2A version. I’ll look for a manifold. I think the early 46-50 2wd intake manifold may be very close to yours. water pump probably the same. Is your engine block a rounded casting type around the cyllinders? Or flat like the military? My block is in very good shape, I think no cracks if you know somebody.
diggerG
 
if the pass. side block casting is flat then you don’t have a 39 - 40 engine block. I believe that when Willys strengthened the 134 block for the military that is what they did, beefed up the casting. You have a 1941 and up engine bolted into an earlier pre war Willys car. I had the exact opposite, a pre war engine bolted into a CJ2A. I COULD be proven wrong but I doubt it. I’ll see if I can get a pic.
diggerG
 
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