I know that there have been multiple posts concerning alternator pulleys for SHP L76 with or without AC but I am still confused. The previous NCRS judging manual edition 5 states that the small block solid lifter engines used a 3 5/8" pulley except for the AC version of L76 which uses a 3 3/8 pulley. The new edition 6 manual has the 65 L76 engine with AC using a 3 " pulley. One of these editions is wrong. Can anyone tell me what my 365hp L76 with AC alternator pulley should be? Thanks. Bill Gould
65 L76 with AC Correct Alternator Pulley
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Re: 65 L76 with AC Correct Alternator Pulley
W/o regard to pouring more fuel on the fire, Gr.2.274 on a page dated l July 1965 has this entry: "PASS, CORVETTE w/Air Cond (exc. 62 amp,
6 cyl w/P/S), #3875968". "exc. 62 amp" =s TI; I have an inquiry in to a friend's Bowtie w/TI on its diameter. The specified pulley diameter for 3875968 is "2 21/32". Price was $3.00.
The AIM indicates some early1965 (late 1964 dates) pulley changes, which include listing of 3875968 - is your car pre-Dec 64?- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Friend has checked in with the L79, A/C, TI Bowtie car and reports a pulley of "3 inches" diameter. Looking at the Gr. 2.274 page, that seems to
fit a listing "64-5 CORVETTE (C.A.C. w/Sp H/Per) 327" for #3846180 which is called out as 3 3/64" - I'll give him the 3/64" due to age plus measuring for free.Last edited by Loren L.; May 31, 2016, 08:39 PM.- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Loren, my 65 is a mid April car. I'm not sure why the AC 365 motor would have a 3" pulley while the non AC 365 motor would have the larger pulley. I very much appreciate your help.- Top
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Re: 65 L76 with AC Correct Alternator Pulley
I know that there have been multiple posts concerning alternator pulleys for SHP L76 with or without AC but I am still confused. The previous NCRS judging manual edition 5 states that the small block solid lifter engines used a 3 5/8" pulley except for the AC version of L76 which uses a 3 3/8 pulley. The new edition 6 manual has the 65 L76 engine with AC using a 3 " pulley. One of these editions is wrong. Can anyone tell me what my 365hp L76 with AC alternator pulley should be? Thanks. Bill Gould
William------
According to GM, 1965 with L-76 and C-60 used alternator pulley GM #3848023 or 3846180. Both pulleys are 3-3/64" OD according to GM.In Appreciation of John Hinckley- Top
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Re: 65 L76 with AC Correct Alternator Pulley
I just sold my original 697 alternator and perhaps the current owner will chime in with his measurements of his alternator. I believe the 697 was only offered on cars equipped with S/H/P with A/C and the T.I. ignition option. I was not aware that it was available on non A/C corvettes. ??? opinions please.- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Loren and Joe, I am satisfied that the pulley slightly large than 3" is correct. Thanks for you help. Bill Gould- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Bill,
Below is an old thread which might help or might not help.
Dave
https://www.forums.ncrs.org/showthre...ulley-with-C60- Top
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Re: 65 L76 with AC Correct Alternator Pulley
I just sold my original 697 alternator and perhaps the current owner will chime in with his measurements of his alternator. I believe the 697 was only offered on cars equipped with S/H/P with A/C and the T.I. ignition option. I was not aware that it was available on non A/C corvettes. ??? opinions please.Last edited by Wayne M.; May 31, 2016, 05:49 PM.- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Joe, in my post 5 above my 38461183 SHOULD have been 180 as you state - but in 3 3/4 pages of listing on the l July 1965 part book page, there is no 3848023 pulley listed. Where is this shown according to GM?
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Re: 65 L76 with AC Correct Alternator Pulley
Charlie, I believe you're correct.
I just sold my original 697 alternator and perhaps the current owner will chime in with his measurements of his alternator. I believe the 697 was only offered on cars equipped with S/H/P with A/C and the T.I. ignition option. I was not aware that it was available on non A/C corvettes. ??? opinions please.- Top
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Re: 65 L76 with AC Correct Alternator Pulley
Enclosed is a drawing and 2 photos of a NOS 3846180 pulley.
According to Chevrolet Parts history GM # 3848023 was replaced with GM # 3846180 in Oct. 1964 for service pulleys. The two pulleys must be very similar.
Dave
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Re: 65 L76 with AC Correct Alternator Pulley
Loren------
You won't find the 3848023 in a July, 1965 P&A Catalog since the 3848023 was discontinued in October, 1964 and replaced by the GM #3846180.In Appreciation of John Hinckley- Top
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