1924-1942 Olds sparkplug chart

AC OLDSMOBILE SPARKPLUG SPECIFICATION CHART

1945 ISSUE Passenger Cars- 1924-1942

Oldsmobile ?Model 30??????????.?..76S

All others thru 1927...............................77

1928 thru 1936???????????????.?86

1937-38-39-40????????????????.45

1941-42?????????????????..?....44

M.L. Anderson

An excellent technical post! Thank you mlander! Now to figure out how to keep it visible and not get lost in the shuffle...

Folks- we need more of this type stuff. If you have info like this for ANY YEARS Oldsmobile, please feel free to post it.

This is to add to the chart above but is only about 18mm by 1/2" reach sparkplugs and to sparkplugs made after 1937 when AC changed their numbering system to the one shown.

Ml.L. Anderson

CHAMPION------ CHAMPION-------AUTOLITE------AUTOLITE-------DELCO AC--------DELCO AC-------

NEW-------------EXTENDED-------NEW-----------EXTENDED-------NEW------------EXTENDED-------

18mm BY---------CORE-------------------------- CORE--------------------------- CORE------------

½? REACH--------NOSE---------------------------NOSE----------------------------NOSE------------

----------------------------------373------------------------------C 81----------------------------

D6------------------------------- 373--------------------------------------------------------------

D9------------------------------- 373------------------------------C82-----------------------------

D9--------------------------------373------------------------------C83-----------------------------

NONE-----------------------------386------------------------------C85-----------------------------

NONE---------------------------------------------3116-----------------------------C85S------------

NONE------------D15Y----------------------------3116----------------------------------------------

D16-------------------------------386------------------------------C86-----------------------------

NONE------------D18Y----------------------------3116----------------------------------------------

D21-------------------------------386------------------------------C87-----------------------------

D23-------------------------------386------------------------------C88-----------------------------

I know for the 238 cu in inline 6 cyl (I believe the same engine was used 1937-1949) used AC R45 spark plugs. That's what's in my 1948 Dynamic 66. ( www.geocities.com/oldsmobile1948 )

Best,

Joe Ferrero

Here is a link to a Cross Reference chart. Has some good stuff for finding a different mfg'r if you can't find the exact mfg'r you want.

http://www.angelfire.com/extreme4/skidoolympique/SPARK_PLUG_CROSS_REFERENCE.htm

Old Codger