Create an account Home  ·  ·  Forums  ·  ·  Articles  ·  ·  Downloads  ·  ·  Photo Gallery  
Login
Nickname

Password

Don't have an account yet? You can create one here.

Navigation
· Home
· Article Archive
· Article Submit
· Downloads
· FAQ
· Forums
· Members List
· Photo Gallery
· Private Messages
· Web Links
· Your Account

Search Articles



Forums

6 volt waterproof distributor ??
How to connect a 12 V tach.
Radio installations
M38A1s used by The Civil Defense
Willys overland service bulletin tappet settings
M170 brackets
Hood Number
9 digit hood number on M170 Any ideas?
Oil on top of Vacuum chamber of fuel pump
Double lipped rear pinion seal direction.

Willys M Jeeps Forums


willysmjeeps.com :: View topic - Setting Timing
 Forum FAQForum FAQ   SearchSearch   UsergroupsUsergroups   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Setting Timing

 
Post new topic   Reply to topic    willysmjeeps.com Forum Index -> Technical Knowledge Base
View previous topic :: View next topic  
Author Message
Boze
Member


Joined: Aug 13, 2008
Posts: 87
Location: Bloomfield Twp., Michigan

PostPosted: Fri Dec 21, 2018 2:00 pm    Post subject: Setting Timing Reply with quote

I want to set the timing on my M38. I have no timing light, so I'll need to get one. How does one set the timing on a 24 volt system? All of the lights I see for sale are 12v. Plus, what effect does the metal braiding have on the function of the timing light? Are there lights with connectors to the waterproof plugs? Or, is there a light made for M series motors? Lastly, is it wise to advance the timing more than the 5 degree mark? Say, 8 degrees? I'm in a bit over my head here. I'm also on a budget.

Thanks for any info.
Back to top
View user's profile Send private message
wesk
Site Administrator
Site Administrator


Joined: Apr 04, 2005
Posts: 14343
Location: Wisconsin

PostPosted: Fri Dec 21, 2018 11:19 pm    Post subject: Reply with quote

Quote:
How does one set the timing on a 24 volt system?


The shortest answer:
The same way one sets it on a 12 or 6 volt system using the same type distributor arrangement.

The second shortest anaswer:
Read the Par 142 on pages 176 thru 181 of the M38's Operator Manual TM 9-8012.

Quote:
All of the lights I see for sale are 12v.


You connect the 12V timing lights black ground clip to the engine's bare metal. You then connect the 12V timing light's red + clip to the underhood battery's + terminal. This terminal will read 12 V's.

Quote:
Plus, what effect does the metal braiding have on the function of the timing light? Are there lights with connectors to the waterproof plugs? Or, is there a light made for M series motors?


The metal braiding prevents the timing light's connector from getting to the primary ignition wire inside the braid. If Fig 59 on page 180 of TM 9-8012 didn't answer this for you then go to my photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

Then open my sub-album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=album119&op=modload&name=gallery&file=index&include=view_album.php

Then go to my Jeep Tools subalbum: http://www.willysmjeeps.com/v2/modules.php?set_albumName=album69&op=modload&name=gallery&file=index&include=view_album.php&page=1

Then open the Military Test Lead Adapter Sets subalbum: http://www.willysmjeeps.com/v2/modules.php?set_albumName=album95&op=modload&name=gallery&file=index&include=view_album.php






High Tension Adapter allows the timing light to connect to the primary plug lead.





Quote:
Lastly, is it wise to advance the timing more than the 5 degree mark? Say, 8 degrees?

NO it is not wise. Usually results in one of the following: 1-Overheating of the coolant, 2-Hard Starting, 3-Pre-ignition.

Finally a few notes that may help.

1 - Static timing is easily done without a timing light by using an ohm meter, continuity checker or just a piece of paper..

2 - The timing light becomes a necessity if you are unsure of the governor (Centrifugal) advance system's proper operation.

You should read TM 9-1825B Auto-Lite Electrical Equipment Chapter 5 carefully and completely concentrating on the Sections I, II, & V, before embarking on this new adventure.


Must use the 1952 edition, the 1944 edition doesn't cover your distributor.

You can find most of it here: http://www.willysmjeeps.com/v2/modules.php?name=Downloads&d_op=viewdownload&cid=46&min=10&orderby=titleA&show=10

Specifically this subalbum: http://www.willysmjeeps.com/v2/modules.php?name=Downloads&d_op=getit&lid=15
_________________
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
Back to top
View user's profile Send private message Send e-mail Visit poster's website
dpcd67
Member


Joined: Nov 25, 2016
Posts: 130
Location: Iowa

PostPosted: Sat Dec 22, 2018 7:13 pm    Post subject: Reply with quote

I don't use a timing light on any of my vehicles regardless of voltage. I static time them and they will start; then fine tune the timing using your ear, and a vacuum gauge. This method works. As far as timing too advanced, you will find out immediately when you drive it as it will ping badly, overheat, and be hard to start, especially on a 6 volt system.
_________________
M38 23100 June 1951
M37B1 1963
Willys MB 1944
Ford GPW 1942
Dodge WC63 1943
Dodge Power Wagon WM300 1967 (Not Military)
Plymouth Barracuda, 1973, 340 4 barrel (Army staff car) Not.
All ground up restored by me.
Lots of others over the years.
Back to top
View user's profile Send private message
wesk
Site Administrator
Site Administrator


Joined: Apr 04, 2005
Posts: 14343
Location: Wisconsin

PostPosted: Sat Dec 22, 2018 8:41 pm    Post subject: Reply with quote

For the newby timing by ear or vacuum gauge is a learned technigue and stumbling thru it will lead to advancing your timing too far and causing damage.

Having taken part in training on the job dozens of new mechanics since the beginnings of my own career in 1966 I always made sure the newby FIRST learned the Correct Method then I would teach them the shortcuts.
_________________
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
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    willysmjeeps.com Forum Index -> Technical Knowledge Base All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Powered by phpBB © 2001 phpBB Group
Forums ©

 



PHP-Nuke Copyright © 2005 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.