Coming home from 2022 G.N. Misfiring!!

Started by Bob Kielar, July 04, 2022, 12:24:04 PM

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The Tassie Devil(le)

The damage that is shown in the pictures lead me to believe that this engine has been suffering for an extremely long time.

Any sudden, and recent problem would show up in clean, damage, but the pictures show so much carbon build up, that it is impossible to see what is new.

The divots out of the face of the valve are old, and as Dave said, detonation will cause this, and lead to destruction and melting of parts.

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


Nasty. "sorry for your loss"
Saw a race motor one time where the broken valve head piece made it through the exhaust cross over into the other side and destroyed that cylinder too!I would not have believed it if I had not seen it.
Flattie Caddy

Bob Kielar

Latest update: Heads at machine shop they are trash! Someone in the past welded in #4 cylinder exhaust port. The Cadillac has only 36,000 miles on her my theory is that when they started the Cadillac after being stored for so long they didn't do it properly. Then just did a quick repair and sold her. I have had her for 12 years and she ran fine up to now. Luckily about six years ago I bought a set of heads from a fellow member that was moving from Wisconsin to Georgia. He wanted to get rid of some spare parts so I bought them just for the heck of it. Wife gave me one of those stares at the time now she is happy I bought them I just smile. :D

Keep Cruzin,
Bob Kielar
Keep Cruzin
1955 Cadillac Fleetwood


All serious Caddy enthusiasts especially from this era should have an extra set of heads. Clay/Lexi

Bob Kielar

Well things went from bad to worse. The machine shop can not repair the engine it has a cracked block. So if anyone knows of someone with a spare 55 331 engine let me know.
Bob Kielar
Keep Cruzin
1955 Cadillac Fleetwood

David King (kz78hy)

David King
CLC 22014  (life)
1958 Eldorado Brougham 615
1959 Eldorado Brougham 56- sold
1960 Eldorado Brougham 83- sold
1998 Deville d'Elegance
1955 Eldorado #277
1964 Studebaker Commander
2012 Volt
CLCMRC benefactor 197

Director and Founder, Eldorado Brougham Chapter
Past President, Motor City Region

Rare Parts brand suspension parts Retailer via Keep'em Running Automotive


These were high compression engines and we do not have the required fuel anymore, so the issue becomes timing too far advanced or retarded. Also complicating things might be timing chain wear.

I wonder if there is an association in #1 and #4, different banks but are they both sisters in the 4 stroke cycle?

Bob Kielar

Thanks for all the replies.

Bob Kielar
Keep Cruzin
1955 Cadillac Fleetwood