1931 Plymouth PA Spark Plugs

[Graham Goetze]

Hi Guys.

As far as I can make out, my PA came with AC G12 spark plugs. Would anyone know what an available equivalent would be?

Kind regards, Graham

Edited September 19, 2022 by Graham Goetze (see edit history)

[ply33]

I don’t know about an exact match but I believe a number of cars used spark plugs with a 18mm base. A quick search turns up a number of options but it is not clear to me what reach you need nor the temperature range.

[Graham Goetze]

A friend is using Autolite 3076 in his '28 Chev but I'd like to fins a positive cross reference.

[viv w]

Found this chart some time ago for AC plugs.

 

 

Not sure if the 32 Plymouth used the same plugs as the 28 Chrysler 52 , but I ran my car for many years with Champion W20 plugs with no issues. I later found out after I sold the car that it should have had W16

[Hans1]

( REGULAR SERVICE - G12 ), ( LONG LIFE  D12 )   ( NEXT   GG )  (  THEN AC 86 )   ( LATEST  D16 )

 

FROM FILES

[Flivverking]

 1931 Plymouth was a 4 banger right.. . plugs maybe similar to the model A Ford In size and range... maybe not
as hot as un-informed model A-ers go for.  
Start with a simple easy to get autolite  3076 plug should do ok in the slightly over medium to warm/ hot range.