Help with julian date conversion

[Joe M.]

Thanks in advance

[Joe L.]

Re: Help with julian date conversion

Thanks in advance

Joe------


A julian date code for parts is usually composed of a 4 digit series. Three of the digits represent the consecutive day of the year. For example, 031 would decode to the 31st day of January. The 3 digits may be either the first three digits or the last three depending upon the convention of the particular manufacturing source. One digit, either the first or the last, represents the last digit of the year. For Delco-Moraine brake components, for example, the year is usually the first digit.

[Domenic T.]

Re: Help with julian date conversion

Joe------


A julian date code for parts is usually composed of a 4 digit series. Three of the digits represent the consecutive day of the year. For example, 031 would decode to the 31st day of January. The 3 digits may be either the first three digits or the last three depending upon the convention of the particular manufacturing source. One digit, either the first or the last, represents the last digit of the year. For Delco-Moraine brake components, for example, the year is usually the first digit.

I thought K was Nov and f was June.

[Joe M.]

Re: Help with julian date conversion



Joe

[Joe M.]

Re: Help with julian date conversion

I'm going by the 1973-1974 Corvette Technical Information Manual & Judging guide from the NCRS. Its saying on page 33 November is D and June is K or did my x-wife switch a few pages on me as a joke?

[Joe L.]

Re: Help with julian date conversion

I thought K was Nov and f was June.

DOM------


A julian date code does not contain any alpha characters. In other forms of date codes, "F" does represent June. "K" represents November IF "I" is used and October if "I" is not used.

In the body build dating a whole different system is used. In that system, "A" represents the first month of the model year build and increases one alpha character for each successive month until the last month of that model year build. The character "I" is used in body build date codes.

[Domenic T.]

Re: Help with julian date conversion

Joe------


A julian date code for parts is usually composed of a 4 digit series. Three of the digits represent the consecutive day of the year. For example, 031 would decode to the 31st day of January. The 3 digits may be either the first three digits or the last three depending upon the convention of the particular manufacturing source. One digit, either the first or the last, represents the last digit of the year. For Delco-Moraine brake components, for example, the year is usually the first digit.

HELP
I have gone thru all my parts thinking (A) was Jan and (L) was Dec.
If not I've done some things wrong on my resto.

DOM

[Joe L.]

Re: Help with julian date conversion

HELP
I have gone thru all my parts thinking (A) was Jan and (L) was Dec.
If not I've done some things wrong on my resto.

DOM

DOM------


For COMPONENTS USING AN ALPHA-NUMERIC DATING SYSTEM, "A" always represents January and "L" represents December only if the date coding system for that component includes the alpha character "I". This is usually the case for castings and some other parts. If the date coding system does not use the character "I" as is the case with many STAMPED date codes using the alpha-numeric system (e.g. Delco-Remy alternators ad starters), then December is represented by an "M".

[Alan S.]

Re: Help with julian date conversion

Hi Joe M.,
I'll just add to remember that some parts were made in batches so there may be gaps in dates that could have you looking for a certain date (or a date extremely close to it) stamping that never existed on that part.
Big Fun!
Regards,
Alan

[Domenic T.]

Re: Help with julian date conversion

Joe,
Thanks a lot for the help. I though that the fact that I learned to do all my own work on my cars was all it took till I got in the numbers game.
I dug thru over 400 lbs of my sorted bolts that I had since the 50's thru today looking for the correct head marks along with all the parts I saved for years recording them in a note book. I am spending more time on that than doing the mechanical work. It seems now that what I did in a few hours using what worked fine at the time now takes a day or so digging for the right #'s and bolt markings.
What an education, The mechanical part now seems to be the easy one.
I used to throw all the nuts & bolts in a carb cleaner basket and use the clean ones I had on what I was doing at the time. Now I am trading parts, nuts, bolts, you name it from car to car and regret all the ones that are out there on cars that I did not knowing that some day they would be the very ones I need.
I am going to get my vin #'s and ask the questions as to when the cars were made.
Both vettes came without a title. I had to apply for new titles.
My 63 was damaged and in a farm yard all together and the guy said he wanted the engine, trans and radiator for a jeep and I could have the rest for $150.00. I got the vette in a basket, he took bulbs, rims/tires radio, radiator, engine, & trans +. Never sent me the paper work after I paid him and by then I forgot where the farm was.
The 67 vette I bought AS/IS wrecked from JD corvette in 1971 and they removed the vin & trim tag before they delivered the car to the Chevy dealership I worked at.
So I will need an education from you guys. I have the vin # only on the 67. The 63 has the vin & trim tag under the glove box. The 67 had the 435 HP and the 63 looked like it was a 300 HP.

DOM