1972 Wiper Assembly.
At Issue (for me) is the difference between the NCRS AM and GM's "Corvette Parts And Illustration Catalog". The GM book on page 10-26 shows a part #34 as Reinforcement, Inner (10.160) and # 17 as Reinforcement ASM W/S Wiper Trans Outer (10.160) The NCRS ASM (Mid America Reprint) shows a reinforcement asm. that appears to be the outer as pictured in the GM book but shows no inner reinforcement as shown in the GM book. My question is, Is this described inner reinforcement necessary?
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Re: 1972 Wiper Assembly.
My 1972 Corvette Parts Catalog (Sept. 1971) lists GM # 3921577 as the inner reinforcements for 68-72 Corvettes models (2 required).
GM # 3956285 (L.H.) and # 3956286 (R.H.) are listed as the left outer and right outer reinforcements for 69-72 Corvette models.
GM # 3921575 (L.H.) and # 3921576 (R.H.) are listed as the left outer and right outer reinforcements for 68 Corvette models.
GM # 3921575 & 3921576 were replaced replaced by 3956285 & 3956286 in June 1974 as per GM Parts History.
My 1969 Chevrolet Parts Catalog (Oct. 1968) also lists GM # 3921577 for 68-69 Corvette models (2 required).
Dave -
Re: 1972 Wiper Assembly.
Dave -- Thanks for the info. My car never had the reinforcement's, looks like I will have to make some, easy enough to do. The books that you use for reference looks like something I should add to my library. Time to hunt E-Bay and swap meets. Rey Stenhouse 1972 LS-502 Coupe.Comment
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Re: 1972 Wiper Assembly.
Rey,
Using the P&I for guidance in how your car was built is fraught with dangers, as is using the AIM.
The P&I does not necessarily give you the originally installed part or part number for your car. The GM SPO (Service Parts Operation) was always trying to reduce inventory and multiply sales by making parts that fit multiple vehicles or model years. Thus some parts are PRODUCTION only. So even if you have the P&I book for the year your car was produced, it will list some parts that are different in configuration than what was installed on your car, or it will not list some of the parts installed on your car. Do you know which? Does anyone?
The AIM is a slice in time, and in some cases each page is a different slice of time. A car built earlier than that page, or later than that page, could be different. On the other hand that page may be accurate for all model year, or perhaps even several model years. Do any of us know which? Do you feel lucky, today?
All that said you may ask what use are these books? One always has to consider the purpose they were intended for. The P&I was to sell functional, serviceable parts after the car was built. It was not intended as a guide to restoration. The AIM was to aid the assemblers in their work. The part numbers might have been changed before or after your car was made. The part number change may have been delayed, or never even made , but so long as the old and new part assembled in the same way the AIM page might await another change before a new page was put into circulation. Given these limitations -- if both the P&I and the AIM call for the same part number you are on firm ground -- until you run into a part that changes configuration without a change in the part number. Then your only source of accurate information is the unmolested cars themselves. The latter is your best source of information. The books are all for fun.TerryComment
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Re: 1972 Wiper Assembly.
Hi Terry, I don,t know if you received my reply or not, if not, my apology, If yes please accept my thanks for the info and for clearing up many things between the two books. Rey Stenhouse 1972 LS502 CoupeComment
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