M38A1 points replacement - terminal screw access?

Discussion topics on Willys Overland M series vehicles

Moderators: TomM, Moderator, wesk

Post Reply
JeepdaddyRC
Member
Posts: 184
Joined: Thu Jan 09, 2020 6:00 pm

M38A1 points replacement - terminal screw access?

Post by JeepdaddyRC »

A previous post on this topic identified the same challenge, but a solution was not explained.

http://www.willysmjeeps.com/v2/modules. ... ic&t=11247

The author stated: "what is especially hard to get at it is that terminal screw. I cannot use a screw driver to remove the screw because the screw head is below the edge of the distributor.
Perhaps I can remove the screw with a small ignition wrench, but cannot replace the screw with it."

I have the same challenge. There is ridge on the distributor housing preventing access to the screw with a screw driver. The screw is below the edge of the distributor housing ridge.
Am I missing something simple?
Does the entire top plate need to be removed or rotated just to change the points?

Image

Image

Image
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16413
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Image

You have several choices. Sometimes you can rotate the advance plate slightly and get a regular common screwdriver blade on the slot at a slight angle or you can invest in a multitude of specialty offset drivers.

Image

Image

Image

Image

Image
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. ... _album.php
JeepdaddyRC
Member
Posts: 184
Joined: Thu Jan 09, 2020 6:00 pm

Post by JeepdaddyRC »

Tried the first three tools shown. No space.
Not enough clearance between distributor ridge and terminal screw.
Turning the advance plate clockwise might move the screw past the ridge for access with a screwdriver.
How do you turn the advance plate clockwise?
Do you have to remove the two screws indicated in first post photo?

Do you know the size if the terminal screw head? Is it 1/4 inch?
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16413
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Looks like you need set #4

Image

https://www.ebay.com/i/324147499433?chn ... 1&mkcid=28

I keep all the sets shown in my tool box. I do not recall ever having to spend more than a couple of minutes removing that screw. If you wish you can remove the rotor and the two plate screws/retainers and lift the plate enough to get that terminal screw out. I believe it's a #8 screw which would use a 5/16" socket normally but you still have no room for the socket.
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. ... _album.php
User avatar
cabinfever
Member
Posts: 201
Joined: Mon May 13, 2013 6:00 pm
Location: Between Crosslake and Emily, Minnesota

Post by cabinfever »

What I did so I will never have this problem again was to replace the ring terminals on the coil wire and the condenser wire with fork terminals.

Now I never have to remove the terminal screw in order to remove or attach the wires.

Just loosen the screw with an ignition wrench and the wires will easily pull out or slip back into place without removing the screw.

Use the same ignition wench to tighten the screw.

Image
Steve Stark - 1955 M38A1 MD #85388

Member - MVPA #35153
Member - Red Bull Historic Military Vehicle Association
JeepdaddyRC
Member
Posts: 184
Joined: Thu Jan 09, 2020 6:00 pm

Post by JeepdaddyRC »

My terminal screw is a good 15 degrees counterclockwise from that pictured. It is completely behind the ridge on the distributor housing, making it very difficult to access.
Your picture shows a terminal screw with much easier access. Is the photo from an M38A1 distributor? Wonder why the difference?
User avatar
cabinfever
Member
Posts: 201
Joined: Mon May 13, 2013 6:00 pm
Location: Between Crosslake and Emily, Minnesota

Post by cabinfever »

I just borrowed that photo from Wes K. The terminal screw on my M38A1 distributor is like yours. It took me hours to get the screw back into place after the first time I removed it with an ignition wrench.

The second time I removed it is when I changed the wire connector ends. Now I will never have to remove the terminal screw again, thank goodness!

Actually, it was a bit easier getting the terminal screw started the second time without any of the wires attached.
Steve Stark - 1955 M38A1 MD #85388

Member - MVPA #35153
Member - Red Bull Historic Military Vehicle Association
User avatar
wesk
Site Administrator
Site Administrator
Posts: 16413
Joined: Sun Apr 03, 2005 6:00 pm
Location: Wisconsin
Contact:

Post by wesk »

Image

When I rotate the viewing angle of Jeepdaddy's distributor to match my photo both appear to be exactly alike except for that small empty hole I have marked.

The level of difficulty would be exactly the same from this view.
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. ... _album.php
JeepdaddyRC
Member
Posts: 184
Joined: Thu Jan 09, 2020 6:00 pm

Post by JeepdaddyRC »

Neiko low clearance screw driver arrived today. Thanks for the suggestion. Will give it a try and change the points and condenser - after I get my rings freed up (hopefully).
Waiting for warmer weather, hands too cold for delicate work in cold garage. Finally above zero today - nice! Thanks for the excellent photo comparison.
RonD2
Member
Posts: 2065
Joined: Wed Oct 01, 2014 6:00 pm
Location: South Carolina, Dorchester County

Post by RonD2 »

I think my condenser and points all came with fork terminals but could be mistaken.

An easy field expedient to make one from the other is to use a sharp pair of side-cutting wire pliers. Two snips to open the ring just wide enough to fit.

And I always thought a snipped ring terminal fit a round screw better than a straight fork terminal. Good luck!
Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

User avatar
45auto
Moderator
Moderator
Posts: 153
Joined: Tue Apr 05, 2005 6:00 pm
Location: Georgia

Post by 45auto »

If I understand the situation--you are trying to remove the small bolt where the points, condenser and primary wire all connect.

Looking at the points sets and condenser I use, they all have the forked terminal ends so All you have to do is loosen the bolt, not remove it, with an ignition wrench and slip the points and condenser wire out and replace the same way. A little bit of jugging, but not hard. I use the Heavy Duty Standard Blue Streak points and condenser which have the forked terminal. There are others that have the eyelet but they are usually off shore brands. Blue Streak points and condensers are pricey but I have had excellent results (years of service) and keep a few sets on hand for new projects and if I ever need a replacement.

Standard Blue Streak Breaker Points AL-4556XP
Standard Blue Streak Condenser AL-111X
Harold W.
MVPA #6833
1945 GPW
1950 CJV-35/U
1951 M38 1952 M38
1962 USMC Contract M38A1
1953 Strick M100 1967 Johnson M416
1968 CJ5 4-Speed 1969 CJ5 V6
Post Reply