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Cadillac & LaSalle Club Discussion Forum

Cadillac & LaSalle Club Forums => Technical / Authenticity => Topic started by: 31355Aman on November 23, 2017, 05:25:33 PM

Title: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: 31355Aman on November 23, 2017, 05:25:33 PM
Can anyone provide information on core plug sizes used in 1931 Cadillac 355A engine block and heads?
Title: Re: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: Spf67@yahoo.com on April 02, 2020, 01:13:06 PM
I have a 31 caddy 355a and use Auto Lite 386 spark plugs (18mm hole)
Title: Re: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: The Tassie Devil(le) on April 02, 2020, 07:34:11 PM
The question is about Freeze Plugs, or Welsh Plugs, not Spark Plugs.

Bruce. >:D
Title: Re: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: Roger Zimmermann on April 03, 2020, 03:15:40 AM
It's what I can see from the 28-36 master parts list:
1 7/8" expansion, in top of crankcase
2 1/4" expansion, aluminum at rear of cam shaft
I hope this will help you.
Title: Re: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: Bob Hoffmann CLC#96 on April 03, 2020, 04:56:04 PM
Not sure who you guys are r talking to??? The OP hasn't been on the board in almost 2 years....
Title: Re: Correct core plug sizes for 1931 Cadillac 355A V8 engine
Post by: Roger Zimmermann on April 04, 2020, 03:12:10 AM
Bob, I did no saw that!
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