Altenator WANTED
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Altenator WANTED
Hi, I'm looking for a 1969 442 w-30 altenator. I am told it would be # 1100 852 55 amp. Correct me if I'm wrong. What date code would be correct for my car?? Car came with the 810 SS1 wheels for disc brakes. Maybe July to Dec. 1968 ?? Preferably rebuilt ready to bolt on. If not I can get it rebuilt. Thanks in advance. Michael
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Joined: Jul 2008
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From: Chi-town
Hi, I'm looking for a 1969 442 w-30 altenator. I am told it would be # 1100 852 55 amp. Correct me if I'm wrong. What date code would be correct for my car?? Car came with the 810 SS1 wheels for disc brakes. Maybe July to Dec. 1968 ?? Preferably rebuilt ready to bolt on. If not I can get it rebuilt. Thanks in advance. Michael
I'm pretty sure that's the correct part number
Date code would be 8K12 or something like that - as long as the first numer was an 8 it was made in 1968
8=1968
K = October (they skipped I for July and used H)
12 = 12th day
Randy C.
Joined: Feb 2009
Posts: 3,344
From: Albany, OR
If your car has A/C or heavy duty cooling, the number you cite is correct. If you have neither of these options, the correct alternator is 1100853. Both alternators are for cars with voltage regulators internal to the alternator.
The 810 SSI wheels indicate to me that your car was built in the APR-JUL 1969 time frame. My research on those wheels tells me they were only made in that 4 month time frame.
The date code on your alternator should generally be in the period from 2 months to a week before the build date of your car. I say generally because that's just a guideline - it's not always true. By Corvette rules, you can have a dated piece on your car that's up to 6 months before the build date of your car and that's the rule I have used for all of my cars ('68 4-4-2, '69 4-4-2, '70 GTO & '71 Corvette). When I restored my '68 4-4-2 with a build date of the first week of APR 1968, I noticed that the engine block was dated in NOV 67. Conversely, the steering box had a date of April 1, 1968 and the steering box cover had a date of April 4, 1968. According to the cowl data tag, it appears those steering parts came straight from the manufacturer to the car! I'm supposing my car was built late in the first week of April 1968 and most likely did not come off of the assembly line until the beginning of the second week of April 1968.
Accordingly, if your car was built in, let's say, May 1969, I'd be looking for an alternator with a date code of FEB, MAR or APR 1969 (month letters 9Bnn, 9Cnn & 9Dnn, respectively), but you could reasonably go back as far as 8Lnn (NOV 68) or 8Mnn (DEC 68) as well, and could also justify having an alternator with a 9Enn (MAY 69) date code, just as long as the date can be construed as being before the build date of the car.
This is just my outlook and opinion on the subject. Good luck on going after your alternator.
Best Regards,
Randy C.
The 810 SSI wheels indicate to me that your car was built in the APR-JUL 1969 time frame. My research on those wheels tells me they were only made in that 4 month time frame.
The date code on your alternator should generally be in the period from 2 months to a week before the build date of your car. I say generally because that's just a guideline - it's not always true. By Corvette rules, you can have a dated piece on your car that's up to 6 months before the build date of your car and that's the rule I have used for all of my cars ('68 4-4-2, '69 4-4-2, '70 GTO & '71 Corvette). When I restored my '68 4-4-2 with a build date of the first week of APR 1968, I noticed that the engine block was dated in NOV 67. Conversely, the steering box had a date of April 1, 1968 and the steering box cover had a date of April 4, 1968. According to the cowl data tag, it appears those steering parts came straight from the manufacturer to the car! I'm supposing my car was built late in the first week of April 1968 and most likely did not come off of the assembly line until the beginning of the second week of April 1968.
Accordingly, if your car was built in, let's say, May 1969, I'd be looking for an alternator with a date code of FEB, MAR or APR 1969 (month letters 9Bnn, 9Cnn & 9Dnn, respectively), but you could reasonably go back as far as 8Lnn (NOV 68) or 8Mnn (DEC 68) as well, and could also justify having an alternator with a 9Enn (MAY 69) date code, just as long as the date can be construed as being before the build date of the car.
This is just my outlook and opinion on the subject. Good luck on going after your alternator.
Best Regards,
Randy C.
Thread Starter
Registered User
Joined: Apr 2011
Posts: 124
If your car has A/C or heavy duty cooling, the number you cite is correct. If you have neither of these options, the correct alternator is 1100853. Both alternators are for cars with voltage regulators internal to the alternator.
The 810 SSI wheels indicate to me that your car was built in the APR-JUL 1969 time frame. My research on those wheels tells me they were only made in that 4 month time frame.
The date code on your alternator should generally be in the period from 2 months to a week before the build date of your car. I say generally because that's just a guideline - it's not always true. By Corvette rules, you can have a dated piece on your car that's up to 6 months before the build date of your car and that's the rule I have used for all of my cars ('68 4-4-2, '69 4-4-2, '70 GTO & '71 Corvette). When I restored my '68 4-4-2 with a build date of the first week of APR 1968, I noticed that the engine block was dated in NOV 67. Conversely, the steering box had a date of April 1, 1968 and the steering box cover had a date of April 4, 1968. According to the cowl data tag, it appears those steering parts came straight from the manufacturer to the car! I'm supposing my car was built late in the first week of April 1968 and most likely did not come off of the assembly line until the beginning of the second week of April 1968.
Accordingly, if your car was built in, let's say, May 1969, I'd be looking for an alternator with a date code of FEB, MAR or APR 1969 (month letters 9Bnn, 9Cnn & 9Dnn, respectively), but you could reasonably go back as far as 8Lnn (NOV 68) or 8Mnn (DEC 68) as well, and could also justify having an alternator with a 9Enn (MAY 69) date code, just as long as the date can be construed as being before the build date of the car.
This is just my outlook and opinion on the subject. Good luck on going after your alternator.
Best Regards,
Randy C.
The 810 SSI wheels indicate to me that your car was built in the APR-JUL 1969 time frame. My research on those wheels tells me they were only made in that 4 month time frame.
The date code on your alternator should generally be in the period from 2 months to a week before the build date of your car. I say generally because that's just a guideline - it's not always true. By Corvette rules, you can have a dated piece on your car that's up to 6 months before the build date of your car and that's the rule I have used for all of my cars ('68 4-4-2, '69 4-4-2, '70 GTO & '71 Corvette). When I restored my '68 4-4-2 with a build date of the first week of APR 1968, I noticed that the engine block was dated in NOV 67. Conversely, the steering box had a date of April 1, 1968 and the steering box cover had a date of April 4, 1968. According to the cowl data tag, it appears those steering parts came straight from the manufacturer to the car! I'm supposing my car was built late in the first week of April 1968 and most likely did not come off of the assembly line until the beginning of the second week of April 1968.
Accordingly, if your car was built in, let's say, May 1969, I'd be looking for an alternator with a date code of FEB, MAR or APR 1969 (month letters 9Bnn, 9Cnn & 9Dnn, respectively), but you could reasonably go back as far as 8Lnn (NOV 68) or 8Mnn (DEC 68) as well, and could also justify having an alternator with a 9Enn (MAY 69) date code, just as long as the date can be construed as being before the build date of the car.
This is just my outlook and opinion on the subject. Good luck on going after your alternator.
Best Regards,
Randy C.
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Posts: 124
Thanks again Michael
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From: Chi-town
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Joined: Oct 2009
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From: Erie,PA
I believe WTony is referring to the 1100853 that I sold him.That was an original,unmolested alternator that I removed from the original 400 engine,and had the correct finned back section.The car was a 69 442,non-AC.It was pulled in 1981 & sat until I separated the engine in 2008.Most of the parts on that engine were cast around August/68,and I think that alternator was the same.
I have seen some 852's pop up for sale,just keep looking.
I have seen some 852's pop up for sale,just keep looking.
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Joined: Jul 2009
Posts: 1,469
From: Beachwood, NJ
Yes Sir thats the one! I had it rebuilt/restored and am VERY happy with my purchase!
But, I believe the 853, 37 amp alt should be the correct one for Michael's car if its a W-30, not the 852 55 amp. The 55 amp was the heavy duty and would have only come on cars with ac???
But, I believe the 853, 37 amp alt should be the correct one for Michael's car if its a W-30, not the 852 55 amp. The 55 amp was the heavy duty and would have only come on cars with ac???
Last edited by WTony; Sep 24, 2011 at 02:29 PM. Reason: added info
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From: Chi-town
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From: Battle Creek, Michigan
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