These are cylinders from my 1963 356B Super 90.
I was wondering what the numbers are telling me.
Three are the same :
I think the numbers in the circle are the date of manufacture that suggest to me 1976 10.2 which is either 10th Feb or 2nd October.
I'm wondering what "E" indicates and 7 in the triangle.
One is different :
It seems to suggest to me 1977.
But what does the "G" and 6 indicate.
Thanks for your help.
David
What do numbers on cylinders mean?
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- Don Gale
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Re: What do numbers on cylinders mean?
The markings A thru K are the cylinder bore diameter group numbers, E = 82.480-82.485mm. G = 82.490-82.495mm.
The numerical designation 5,6,7,8 inside the triangle are the cylinder height groups. I did not find actual dimensions for those, other than it's important that all 4 cylinders match the same height within an (unspecified) tolerance. Beyond that, I can only speculate that perhaps one cylinder height differs if the person assembling the engine noticed that the case deck height or the cylinder head bore depth differed from acceptable (unspecified) values.
The numerical designation 5,6,7,8 inside the triangle are the cylinder height groups. I did not find actual dimensions for those, other than it's important that all 4 cylinders match the same height within an (unspecified) tolerance. Beyond that, I can only speculate that perhaps one cylinder height differs if the person assembling the engine noticed that the case deck height or the cylinder head bore depth differed from acceptable (unspecified) values.
1958 356A 1600 Super Sunroof Coupe
former 1966 Euro 912 Sunroof
former 1978 Intermeccanica Speedster w/'68 912
Member Since 1983, #4039
"Nostalgia isn't what it used to be"
former 1966 Euro 912 Sunroof
former 1978 Intermeccanica Speedster w/'68 912
Member Since 1983, #4039
"Nostalgia isn't what it used to be"
-
- 356 Fan
- Posts: 123
- Joined: Wed Aug 15, 2018 1:55 pm
- Location: United Kingdom
Re: What do numbers on cylinders mean?
Don,
This one has tested the community, much appreciate your answer which makes total sense. Thank you.
David
This one has tested the community, much appreciate your answer which makes total sense. Thank you.
David