Differences????

[Michael S.]

Are there any differences (physical appearance and/or operation) between a 1964 Corvette wiper motor and a 1967 wiper motor?

Thanks,

Mike
#11202

[Joe L.]

Re: Differences????

Mike-----

Except for "dates", no differences that I am aware of.

[Michael S.]

Re: Differences????

Thanks Joe, that's what I thought. Just wanted to be sure!

Mike

[Geoff C.]

Re: Differences????

Gentlemen,

I am not a number only person/collector. But several years ago, when you could still get these from the mass market rebuilders, like Arrow - there were two distinct part numbers which were stamped on the rounded armature end of the assembly. I even have a drawing of these stamping in our old catalogs. If I remember correctly, 63-64 had one stamping and 65-67 had another.

Geoffrey Coenen

PS If you want to see them: your choice is to load a very SLOW loading Adobe pdf file by clicking on the link below or simple look up Wiper Motor in the you know whose catalog.




63-64 & 65-67 wiper motor stampings

[Mike M.]

Re: Differences????

There is definitly a difference in the embossed # on the early vs late c-2 wiper motors.See judging manual(don't have an example of each handy but if you can't figure it out using the judging manual, send email and i'll go to the barn tomorrow and retreive an example of each). mike

[Joe L.]

Re: Differences????

Geoffrey-----

Well, what do you know? Like I've said before, there are all kinds of hidden secrets to be found in that reference manual......I mean catalog. I've been meaning to read it from cover-to-cover but I never find the time.

Anyway, I did a little research on the matter. As we likely all know, the SERVICE part number for the motor did not change over the 63-67 period---it was GM #4909107 throughout. However, the SERVICE part number applies to the box containing the motor and a few other parts and/or instruction sheet. Generally, however, if the part number for the motor in the box were to change, the SERVICE part number for the motor (i.e. the number on the box) would change, too. That, apparently, didn't happen in this case.

As it turns out, the numbers on the end of the case as you have pictured are the PRODUCTION part numbers for the wiper motor assembly. Those numbers DID change. The 63 to very early 65 number was GM #5044516 and the later 65 through 67 number was GM #5044602, exactly as shown in the aforementioned reference manual. Other than the numbers, though, I don't think that the function or appearance of the motor changed; likely the differences were internal. However, I never noticed the difference in numbers, so maybe there is some other external difference.

I feel pretty confident that early "editions" of the GM #4909107 SERVICE motor assembly probably contained the GM #5044516 motor assembly while those sold after about 1965 probably contained the GM #5044602 motor assembly. Which means that the 5044602 is probably a lot easier to find than a 5044516. Functionally, though, they should be completely interchangeable.

[Geoff C.]

What Joe said.

(I'm trying to increase my post count. So I can become an Elite member).
Ooops sorry wrong Forum.

[Joe R.]

Correction Please (Pardon)

The answer Joe posted was correct in all but one area. The number on the 63-65E W/W motor is 5044518 and the number on the 65L-67 W/W motor is 5044602. There must be a typo error in the judging manual which should be corrected. I have just checked several 63-65E motors and the number is indeed an "8". That's why judging manuals need constant input from us little people out in the field and judges who are willing to listen.

JR

[Mike M.]

Re: Differences????

Went to barn and garages this am and here's what our c-2's have in terms of the two digit # embossed on the alum case of the wiper motor: # 16 embossed on the wiper motors of our 63's and 64 vin6938. The 66 and 67 c-1s all have the # 13 embossed on their alum motor cases. Two of the 65s have # 13 embossed. and another 65 has #14 embossed in its motor case. a 64 i'm certain i replaced its orig motor has a 15 embossed on its case. mike

[Joe R.]

Re: Differences????

Doc,

That's the mold number. The casting plant had to know which mold was bad if they had a problem so they numbered each mold for quick identification.

JR

[Charles M.]

Re: Differences????

Mike, if you aren't looking for a correct part, I have info on another GM wiper motor that is an exact fit. E-mail me at 64vette@tampabay.rr.com if you want the info.

[Joe L.]

Re: Correction Please (Pardon)

JR-------

I didn't get any of this information out of an NCRS judging manual. However, I did mis-report the PRODUCTION part number of the 63 to E65 motor. It is, indeed, GM #5044518. That's the number that I had in my notes but, from some reason or another, I typed (several times, too) "5044516".

The PRODUCTION part number for the L65-67 motor, GM #5044602, I did not err on, though.

[Mike M.]

Re: Differences????

JR: can we assing a mold # to a particular c-2 model year? thanks, mike

[Joe R.]

Re: Differences????

Mike,

No, the mold number is random and the same casting can be found on other Chevrolet models throughout the 60's. The only difference is the number on the end of the motor can as outlined in Joe Lucia's message. The mold number was just for the manufacturer to find the bad casting mold quickly, shut it down and have it repaired.

JR

[Mike M.]

Re: Differences????

JR; thanks, mike