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Correct core plug sizes for 1931 Cadillac 355A V8 engine

Started by 31355Aman, November 23, 2017, 05:25:33 PM

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31355Aman

Can anyone provide information on core plug sizes used in 1931 Cadillac 355A engine block and heads?

Spf67@yahoo.com

I have a 31 caddy 355a and use Auto Lite 386 spark plugs (18mm hole)

The Tassie Devil(le)

The question is about Freeze Plugs, or Welsh Plugs, not Spark Plugs.

Bruce. >:D
'72 Eldorado Convertible (LHD)
'70 Ranchero Squire (RHD)
'74 Chris Craft Gull Wing (SH)
'02 VX Series II Holden Commodore SS Sedan
(Past President Modified Chapter)

Past Cars of significance - to me
1935 Ford 3 Window Coupe
1936 Ford 5 Window Coupe
1937 Chevrolet Sports Coupe
1955 Chevrolet Convertible
1959 Ford Fairlane Ranch Wagon
1960 Cadillac CDV
1972 Cadillac Eldorado Coupe

Roger Zimmermann

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.
1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101

Bob Hoffmann CLC#96

Not sure who you guys are r talking to??? The OP hasn't been on the board in almost 2 years....
1968 Eldorado slick top ,white/red interior
2015 Holden Ute HSV Maloo red/black interior.
             
Too much fun is more than you can have.

Roger Zimmermann

1956 Sedan de Ville (sold)
1956 Eldorado Biarritz
1957 Eldorado Brougham (sold)
1972 Coupe de Ville
2011 DTS
CLCMRC benefactor #101