Sparg plug

[Standa]

Hello,
I got to the M38 spark plug.
I do not fit there.
They designation AUTO - LITE AR8S
Do you know what cars have to be?






_________________
1952 - M38
1951 - M100 Trailer
1960 - GAZ 69M
1959 - ITM Jeep


http://www.jeep-m38.rps.cz/


Jeep Willys FOREVER

[wesk]

Hello Standa,

It is a military plug and is not used in civilian vehicles. It is still in production by Autolite but under it's newer number 2246. Substitute numbers for it would be:
AC Delco SR47E
Autolite 2246
Blue Crown SR6F14
Champion XEJ12
Champion stk 567
General Motors 5612829
Stitt S47-5MC

The correct plug for the M38 is Auto-Lite AR5S or new Autolite # 2243.
Other numbers that it may be found in new old stock sources from surplus dealers are:

Champion XMJ-14
AC WR44
Mil Spec # MS35909-1
Ordnance # 7524258


_________________
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

[Bretto]

Out of curiosity, do the mil-spec plugs have the same electrode and thread end as a civy plug? Meaning other than the wire terminating end, are they the same?
_________________
Brett
'51 M38
PHOTO DIARY OF MY BUILD

[wesk]

Yes they are they equivalent of the J8 series used in the MB and CJ flatheads.
_________________
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

[Standa]

Thank you for your help.
I know what I buy.
I'll look into what the car's spark plugs are
_________________
1952 - M38
1951 - M100 Trailer
1960 - GAZ 69M
1959 - ITM Jeep


http://www.jeep-m38.rps.cz/


Jeep Willys FOREVER

[MrWillys]

[wesk]

If a 45 MB were set up for waterproof ignition with the M38 type spark plug leads then the M38 plugs will fit. 2243 or 2245. If the AR8S (2246) has the same upper barrel you could use it as well but it would be a very hot plug for your application. You would have to lay a AR8S (2246) along side either of the M38 plugs and measure the depth of the inside of the upper barrel and the thread size on the upper barrel.
_________________
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

[MrWillys]

A lot of the brands you have in the US are not available here. I did a check of the plugs that are in the car, they are Champion J6C. The NGK equivalent is NGK B6S. Both brands are common here, so I should be able to find one of them.
Thanks!
_________________
1943 Willys

[MrWillys]

Changed the spark plugs with new NGK plugs.
I checked the old plugs, and I have to say I have never seen plugs looking so healthy as the ones I removed. Rusty on the outside, and a nice light brown color on the inside. I have seen a lot of spark plugs, but these scream healthy engine x 4.
Nice! Engine seems to start up a bit easier now as well!
_________________
1943 Willys

[wesk]

Glad she runs well for you.
_________________
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

[MrWillys]

Not as happy as I am!
_________________
1943 Willys