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Author Topic: 1957 Eldorado engine question  (Read 276 times)

Offline Brian Laurance

  • Posts: 51
  • Name: Brian Laurance
1957 Eldorado engine question
« on: January 29, 2021, 06:47:46 PM »
I will be looking at a 1957 Eldorado Seville tomorrow, and have learned that the car may have a 390-cid engine rather than the original 365-cid engine in it.

I have been advised that many 365's were replaced by 390's over the years. 

Are the engines externally identical?  What would prompt owners to replace their 365's with 390's?  Finally, would a 390 in a '57 Eldorado significantly diminish the car's value?

Thank you in advance for any input you can furnish.

Offline The Tassie Devil(le)

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  • CLC Number: 18992
  • Name: Bruce Reynolds
Re: 1957 Eldorado engine question
« Reply #1 on: January 29, 2021, 07:13:02 PM »
G'day Brian,

The only reason anyone would substitute a 390 would probably because the original was worn out, and the later replacement was available, or just because they could.

There is a difference in the 390's, as the '59 is the same dimentions as the '57, but the '60 to '62 moved the Oil Filter to the lower right side of the Block, and used a full-flow filter.   Then the '63 390 is a different engine again.

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

 

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