1966 alternator date code ?
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
Originally Posted by pusher_sr
what would be the correct date code on an alternator for a car that was built in may of 1966 ? thanks.
The first digit would be calender year. Second digit is the month and the last two are the day of the month. For example, 6E12 = 1966, May,12.
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
I don't have a '66 JG, but assuming the alternator date coding would be same as in my '65 JG the date code should be a 4-letter code of: YMDD
Y=year
M=Month
DD=day of the month
example: 5B21 = Feb 21,1965
the month codes run as follows:
A=Jan, B=Feb, C=March, D=April, E=May, F=June, G=July, H=Aug, J=Sept, K=Oct, L=Nov, M=Dec
"I" is not used.
for a May '66 car you probably want a unit dated March or April of '66 but I believe NCRS actually allows up to a six month time frame back so you may be able to get away with a date code as far back as approx Dec. '65 but i'd try to find one closer if possible.
For an April dated alternator the code would be 6Dxx, where "xx" is the day.
I think you should look for anything with a 6Bxx, 6Cxx, or 6Dxx. Depending on the build date of your car in May, you may be able to find an early dated 6Exx unit too.
hope this helps and I hope they didn't change all the dating code info from '65 to '66 or else this is all wrong.
Y=year
M=Month
DD=day of the month
example: 5B21 = Feb 21,1965
the month codes run as follows:
A=Jan, B=Feb, C=March, D=April, E=May, F=June, G=July, H=Aug, J=Sept, K=Oct, L=Nov, M=Dec
"I" is not used.
for a May '66 car you probably want a unit dated March or April of '66 but I believe NCRS actually allows up to a six month time frame back so you may be able to get away with a date code as far back as approx Dec. '65 but i'd try to find one closer if possible.
For an April dated alternator the code would be 6Dxx, where "xx" is the day.
I think you should look for anything with a 6Bxx, 6Cxx, or 6Dxx. Depending on the build date of your car in May, you may be able to find an early dated 6Exx unit too.
hope this helps and I hope they didn't change all the dating code info from '65 to '66 or else this is all wrong.
Thread Starter
Instructor
Joined: Jun 2004
Posts: 165
Likes: 0
From: ladysmith b.c.
the date on the alternator wouldn't be the exact same date as the car though, would it? do they match up the two dates or is the alternator built 2 or 3 weeks before having an april date code?
Le Mans Master
Joined: Apr 2004
Posts: 7,106
Likes: 38
From: Newark DE
the alternator is built and should be dated PRIOR to the build date of the car.
I don't know the normal time frame to allow from the date of the alternator and than allowing transportation time from the alternator production factory to the car production line and than the normal time it sat on a shelf until it was picked up to be installed on the motor but I'd figure maybe about 2 weeks minimum give or take?
To be safe I'd find a unit that is dated a month or two prior to the build date of the car and you should be safe.
Do you know the build date of your car? if not, post the last 5 #'s of your VIN and we can look it up for you.
I don't know the normal time frame to allow from the date of the alternator and than allowing transportation time from the alternator production factory to the car production line and than the normal time it sat on a shelf until it was picked up to be installed on the motor but I'd figure maybe about 2 weeks minimum give or take?
To be safe I'd find a unit that is dated a month or two prior to the build date of the car and you should be safe.
Do you know the build date of your car? if not, post the last 5 #'s of your VIN and we can look it up for you.
