Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

[Scott S.]

Hi Joe,

According to the 1967 AIM (1ASM, Sheet D-4), the windshield washer nozzle assembly is GM #3824042. I have seen a GM NOS package with that part number on it, so it must have been available under that part number in service. The package was also labeled GR. 10.156

I have seen another windshield washer nozzle in a GM NOS package with part number 3776301. It was also labeled GR. 10.156

Did GM #3776301 supersede the original GM #3824042 as a service replacement?


Thank you,

Scott

[Jack H.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Group 10.156 is the section of the Parts & Accessories Catalog where washer nozzles are housed. Some part numbers were for Corvette, others for Trucks, then there's Buick...get the picture?

PN 3824042 is what's listed in the '72 P&A Catalog as being specific to '63-67 Corvette. I don't know what 3776301 was rifle shot at, but it's an earlier number than that called for in either the AIM or Corvette P&A Catalog.

3706644 is the PN for C1 Corvettes. I suspect the 3776301 number you mention is NOT a Corvette part, but a piece that could substitute which was probably used on another vehicle...

[Joe L.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Hi Joe,

According to the 1967 AIM (1ASM, Sheet D-4), the windshield washer nozzle assembly is GM #3824042. I have seen a GM NOS package with that part number on it, so it must have been available under that part number in service. The package was also labeled GR. 10.156

I have seen another windshield washer nozzle in a GM NOS package with part number 3776301. It was also labeled GR. 10.156

Did GM #3776301 supersede the original GM #3824042 as a service replacement?


Thank you,

Scott

Scott------


GM #3824042 was the washer nozzle released in late 1962, used in PRODUCTION for 1963-65 Corvettes and once available in SERVICE for 1963-67 Corvettes. It was available in SERVICE until July, 1974 when it was discontinued and replaced by GM #3776301. The latter is a part released in about 1961 and assigned to group 8.798, a windshield washer parts group that became obsolete in the early 60's. Then, the 3776301 was transferred to parts group 10.156. I can find no original application for the 3776301 but it must have had one. It was finally discontinued without supercession in August, 1977.

Curiously, 1966-67 Corvettes did not use washer nozzle GM #3824042 in PRODUCTION, although that part was specified for SERVICE until 1974. In PRODUCTION, 1966-67 Corvettes used nozzle GM #3776302. This part was also once available in SERVICE but it was never cataloged for a Corvette or, even, any other application I can find. It was discontinued without supercession in October, 1988.

[Scott S.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Group 10.156 is the section of the Parts & Accessories Catalog where washer nozzles are housed. Some part numbers were for Corvette, others for Trucks, then there's Buick...get the picture?

Hi Jack,

I think I understand what you're saying, Group 10.156 includes washer nozzles for multiple models, each having their own distinct part number within Group 10.156.

I have acquired a couple of the old catalogs, but I'm still learning how to use them properly:

1. GM Parts Division - Chassis and Body Parts Catalog
Chevrolet Corvette - Effective September 1, 1974

2. GM Parts Division - Chassis and Body Parts Catalog
Chevrolet Corvette 1953 THRU 1977 - Effective September, 1976

3. Chevrolet 1953-77 Corvette Parts Illustration Catalog - Code 14A - September 1976

4. P&A 30B, February 1974
1953-1974 Chevrolet Corvette Parts & Accessories Catalog


I just found the 3824042 washer nozzles in the P&A 30B, February 1974 catalog, the 3776301 was not listed:

10.156 NOZZLE ASSY., Windshield Wiper
63-67 Corvette ............................... 3824042 .............. 2 ..... 1.64 ..... washer spray
68 Corvette ................................... 3937631 L.H. .................. 56 ....... left washer spray
68 Corvette ................................... 3937632 R.H. .................. 62 ....... right washer spray

What does the "1.64", "56" and "62" in the fourth column reference?

[Joe L.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Hi Jack,

I think I understand what you're saying, Group 10.156 includes washer nozzles for multiple models, each having their own distinct part number within Group 10.156.

I have acquired a couple of the old catalogs, but I'm still learning how to use them properly:

1. GM Parts Division - Chassis and Body Parts Catalog
Chevrolet Corvette - Effective September 1, 1974

2. GM Parts Division - Chassis and Body Parts Catalog
Chevrolet Corvette 1953 THRU 1977 - Effective September, 1976

3. Chevrolet 1953-77 Corvette Parts Illustration Catalog - Code 14A - September 1976

4. P&A 30B, February 1974
1953-1974 Chevrolet Corvette Parts & Accessories Catalog


I just found the 3824042 washer nozzles in the P&A 30B, February 1974 catalog, the 3776301 was not listed:

10.156 NOZZLE ASSY., Windshield Wiper
63-67 Corvette ............................... 3824042 .............. 2 ..... 1.64 ..... washer spray
68 Corvette ................................... 3937631 L.H. .................. 56 ....... left washer spray
68 Corvette ................................... 3937632 R.H. .................. 62 ....... right washer spray

What does the "1.64", "56" and "62" in the fourth column reference?

Scott------


The reason that your catalog still shows the GM #3824042 is that the publish date of your catalog (2/74) is prior to the discontinuation of the 3824042 and supercession by the GM #3776301 (7/74). If you had a catalog published after 7/74 but before mid-1977, it would show the 3776301.

The 1.64, .56, and .62 represent the GM list price of the pieces at the time the catalog was published.

[Scott S.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Scott------

GM #3824042 was the washer nozzle released in late 1962, used in PRODUCTION for 1963-65 Corvettes and once available in SERVICE for 1963-67 Corvettes. It was available in SERVICE until July, 1974 when it was discontinued and replaced by GM #3776301. The latter is a part released in about 1961 and assigned to group 8.798, a windshield washer parts group that became obsolete in the early 60's. Then, the 3776301 was transferred to parts group 10.156. I can find no original application for the 3776301 but it must have had one. It was finally discontinued without supercession in August, 1977.

Hi Joe,

Thank you for looking this up, this is fascinating stuff (to me, anyway)




The washer nozzles I have seen in the 3824042 GM package

The washer nozzles I have seen associated with the 3776301 GM package (it was an open package, so I can't be sure they originally came in that package) did NOT have the flat area machined into the Threads, it had full threads all the way up to the nozzle head, but otherwise looked identical.

without a flat area machined into the Threads fit into a 1963-67 wiper grill, without modifying either the grill or the washer nozzle?

If anyone has a GM 3776301 washer nozzle still sealed in the GM package, we could verify whether the 3776301 had a flat surfaced machined into the Threads (or not). If it didn't, then I don't know how it could be used as a service replacement.

[Scott S.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Curiously, 1966-67 Corvettes did not use washer nozzle GM #3824042 in PRODUCTION, although that part was specified for SERVICE until 1974. In PRODUCTION, 1966-67 Corvettes used nozzle GM #3776302. This part was also once available in SERVICE but it was never cataloged for a Corvette or, even, any other application I can find. It was discontinued without supercession in October, 1988.

Joe, have you cross-checked your parts books with the 1967 AIM? The AIM that I have shows GM #3824042GM #3776302

[Scott S.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Scott------

The reason that your catalog still shows the GM #3824042 is that the publish date of your catalog (2/74) is prior to the discontinuation of the 3824042 and supercession by the GM #3776301 (7/74). If you had a catalog published after 7/74 but before mid-1977, it would show the 3776301.

The 1.64, .56, and .62 represent the GM list price of the pieces at the time the catalog was published.

Thank you, I understand the "price" column now!

Next, I need to find out if the 3776301 washer nozzle had a flat surface machined into the Threads, because if it didn't, I can't see how it would be a serviceable replacement part, unless either the hole in the wiper grill was "hogged out" to accommodate a fully circular bolt/shaft diameter, or the washer nozzle assembly was manually filed down, in order to fit the stock 63-67 wiper grill washer nozzle opening.

[Joe L.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Joe, have you cross-checked your parts books with the 1967 AIM? The AIM that I have shows GM #3824042GM #3776302

Scott------


Yes, that was in error. I was using another reference and I read it too fast and, consequently, erred in my statement. I've now checked the AIM and the other reference and find that both concur that 3776302 is a washer, and NOT a nozzle.

I've deleted the last paragraph of my above post to eliminate that inaccurate information.

[Joe L.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Thank you, I understand the "price" column now!

Next, I need to find out if the 3776301 washer nozzle had a flat surface machined into the Threads, because if it didn't, I can't see how it would be a serviceable replacement part, unless either the hole in the wiper grill was "hogged out" to accommodate a fully circular bolt/shaft diameter, or the washer nozzle assembly was manually filed down, in order to fit the stock 63-67 wiper grill washer nozzle opening.

Scott-----


I expect that the 3776301 that you observed is an original piece even though the package was opened. Furthermore, I expect that the difference between the 3776301 and the 3824042 is just what you observed-----the latter has a flat spot for indexing and the former does not. In fact, somewhere "rattling around in my 'noggin" I seem to vaguely recall just that.

Many times a GM part sold in later SERVICE will not be just the same as the original part and require "re-work" to make it fit (or make the car fit it). I expect that's what happened here. Keep in mind that the 3776301 replaced the 3824042 in July, 1974. That was fully 7 years after the last C2 was built. By that time, less-than-identical SERVICE parts might have been supplied for a lot of things. Also, keep in mind that the 3776301 only lasted until mid-1977. That might indicate that folks who bought it were unsatisfied because of just the problem you described. If so, GM had 2 options: either bring back the 3824042 or discontinue the nozzles altogether. When faced with this sort of situation, they almost always choose the latter course.

[Scott S.]

Re: Joe Lucia - part number question on 1963-1967 Windshield Washer Nozzles

Scott-----


I expect that the 3776301 that you observed is an original piece even though the package was opened. Furthermore, I expect that the difference between the 3776301 and the 3824042 is just what you observed-----the latter has a flat spot for indexing and the former does not. In fact, somewhere "rattling around in my 'noggin" I seem to vaguely recall just that.

Many times a GM part sold in later SERVICE will not be just the same as the original part and require "re-work" to make it fit (or make the car fit it). I expect that's what happened here. Keep in mind that the 3776301 replaced the 3824042 in July, 1974. That was fully 7 years after the last C2 was built. By that time, less-than-identical SERVICE parts might have been supplied for a lot of things. Also, keep in mind that the 3776301 only lasted until mid-1977. That might indicate that folks who bought it were unsatisfied because of just the problem you described. If so, GM had 2 options: either bring back the 3824042 or discontinue the nozzles altogether. When faced with this sort of situation, they almost always choose the latter course.

Thank you very much, Joe.

It wonder how hard it would be to carefully grind down a flat spot on the 3776301, to mimic the flat area on the 3824042, to enable the 3776301 to fit into the opening in the wiper grill... it looks like the whole nozzle is chromed, including the Thread area, so I'm not sure how well grinding down the chrome would work out.