[C1] Block Date Code
Melting Slicks
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L 14 1 - November 14, 1961. What is the block casting number?
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Drifting
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L= December
14= 14th
1= 1961 So it would be for a 1962 passenger car because 62 Corvettes had 327 engines and the one you have is a 283. (3789935)
14= 14th
1= 1961 So it would be for a 1962 passenger car because 62 Corvettes had 327 engines and the one you have is a 283. (3789935)
Last edited by 65GGvert; Mar 3, 2021 at 11:32 PM.
Melting Slicks
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I seem to recall that the letter I was not used as a month indicator because it looked like the number one, therefore the letter L is November and M is December. Was this not the case in '61 and '62?
Drifting
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Think I made same mistake. Appears "I" was used for block casting dates making the "L" a Dec date; however, "M" can also appear on "some" blocks indicating a special casting modification block and a specific date would be unknown.
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Melting Slicks
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Quote from JohnZ from prior threads, "Nope, "L" is November on a GM-manufactured component with a stamped date code - they didn't use the "I" character; casting dates did, but stamped dates didn't."
Cast parts used the "I", stamped parts did not. Example is the expansion tank which is what this thread was about.
Last edited by Panama 58; Mar 4, 2021 at 09:08 AM.
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Yep. I checked it in some of my old JG's and I am wrong. "I" was used in the casting date so L would be December. My bad. I stand corrected.
Quote from JohnZ from prior threads, "Nope, "L" is November on a GM-manufactured component with a stamped date code - they didn't use the "I" character; casting dates did, but stamped dates didn't."
Cast parts used the "I", stamped parts did not. Example is the expansion tank which is what this thread was about.
Quote from JohnZ from prior threads, "Nope, "L" is November on a GM-manufactured component with a stamped date code - they didn't use the "I" character; casting dates did, but stamped dates didn't."
Cast parts used the "I", stamped parts did not. Example is the expansion tank which is what this thread was about.
Safety Car
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The date code on the pattern was small & part of the sand could break off or sand could fall in part of the date depression when the sand mold was made. It could be a L or I. There are also a lot of times ite hard to tell 6/8/9 . **** happens when you pour molten iron in a green sand mold.
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From: PHOENIX AZ. WHAT A MAN WON"T SPEND TO GIVE HIS ASS A RIDE
JIM I made many patterns that we put the date tags in but NEVER used a capital I. The brass/ aluminum # we put on the date tag looked like a I not a double T. Dont remember the letter sets we bought had that kind of I
Melting Slicks
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Yep, that's a good example of what I mean. So, I'm not following the claim that "I" was not used on stamped dates. We are still talking about an engine block, aren't we?
Melting Slicks
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Yes. My point in posting John's quote was to explain where I had forgotten and incorrectly applied the "no I" to casting dates as well. Clearly stamp pads are an exception as you have drawn out and I have have validated with a photo.
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OK, I feel better. For a moment there it felt like everyone had turned left while I went straight.
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Wait a minute, is it a capital "i" or is it a Roman numeral 1? Just a passing thought, as long as we all agree that an "L" is December on a block casting date and no letters were skipped from A to L in that case.
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