Wanted: early 1970 AIM info

[Mike E.]

Do you have a 1970 AIM with a section 1 page F26 earlier than 3-16-70? If so, what does it show for a part number for the screw that attaches the lower front tab of the rocker panel molding? It is the part that was changed to 9419322. Thanks for looking

[Sal C.]

Re: Wanted: early 1970 AIM info

Mike, The page in my manual is dated 4/18/69 and shows the same number, 9419322 but my parts history books show that number removed from service on 10/68 and being replaced by 9416223 in 11/75.

[Terry M.]

Re: Wanted: early 1970 AIM info

Do you have a 1970 AIM with a section 1 page F26 earlier than 3-16-70? If so, what does it show for a part number for the screw that attaches the lower front tab of the rocker panel molding? It is the part that was changed to 9419322. Thanks for looking

Mike
One 1970 AIM shows UPC1 Sheet F26 as the gas filler cap. UPC1 Sheet F24 is dated 4-18-69 CI, that screw is shown as #4 9419322
The other versions of the 1970 AIM are in the garage and will have to wait a few days for me to get access.

[Joe L.]

Re: Wanted: early 1970 AIM info

Mike, The page in my manual is dated 4/18/69 and shows the same number, 9419322 but my parts history books show that number removed from service on 10/68 and being replaced by 9416223 in 11/75.

Sal------


GM #9416223 was a #10-16 X 7/8" hex washer head self tapping screw with a zinc finish.

[Mike E.]

Re: Wanted: early 1970 AIM info

Sal------


GM #9416223 was a #10-16 X 7/8" hex washer head self tapping screw with a zinc finish.

Joe--thanks. What was 9419322? Different finish, different length, or just different part number?

[Edward J.]

Re: Wanted: early 1970 AIM info

Joe--thanks. What was 9419322? Different finish, different length, or just different part number?

Mike a few years back I was looking for these screws and it happens that the same screws were used under the dash, I think it may have been the screws that hold up the sockets that hold up the foot well lamps. so I used these screws and found the suitable replacements to re-attach lamps. someone hereon TDB researched the part no.

[Joe L.]

Re: Wanted: early 1970 AIM info

Joe--thanks. What was 9419322? Different finish, different length, or just different part number?

Mike------

GM #9419322 was virtually identical to GM #9416223 except it was 3/4" long. There's also a possibility it was phosphate-finished but I can't determine that one way or the other.

[Mike E.]

Re: Wanted: early 1970 AIM info

I'm looking for help here. The TIMJG is right on in describing that 1970 and early 1971 used a pan head screw for the rocker panel tab, and at some point it changed to an indented hex head. Yet the AIM part number call out was the same all the way through. (For indented hex head). How do you explain that one number describes two different head-type sheet metal screws? Or how did they go a year and a half with a "wrong" screw?

[Joe L.]

Re: Wanted: early 1970 AIM info

I'm looking for help here. The TIMJG is right on in describing that 1970 and early 1971 used a pan head screw for the rocker panel tab, and at some point it changed to an indented hex head. Yet the AIM part number call out was the same all the way through. (For indented hex head). How do you explain that one number describes two different head-type sheet metal screws? Or how did they go a year and a half with a "wrong" screw?

Mike-------


I strongly suspect that a screw other than the ones shown in the AIM was used for this application. Maybe the factory thought it worked better or maybe the AIM-specified screw was not available or maybe something else. I'm very confident that the two screws specified in the AIM are configured as I have described above with the possible exception of finish.

[Mike E.]

Re: Wanted: early 1970 AIM info

Joe,
The TIMJG is correctly saying that a screw other than what was specified was used. And that is based on a solid foundation of observation of unmolested original cars. I'm also convinced that what you have provided is accurate, and the 9419322 was replaced by 9416223 which was a different length than the 9322. Why would the 9419322 be removed from service in 10/68, be spelled out in the AIM through 72, and be not be replaced until 11/75? And the assembly-line screw from startup of 70 production until sometime in 71 is neither of those. From mid71 through 72, they were then installing a part that they supposedly did not have in the system. Obviously we are seeing holes in GM documentation. I'm finding that interesting.

[Joe L.]

Re: Wanted: early 1970 AIM info

Joe,
The TIMJG is correctly saying that a screw other than what was specified was used. And that is based on a solid foundation of observation of unmolested original cars. I'm also convinced that what you have provided is accurate, and the 9419322 was replaced by 9416223 which was a different length than the 9322. Why would the 9419322 be removed from service in 10/68, be spelled out in the AIM through 72, and be not be replaced until 11/75? And the assembly-line screw from startup of 70 production until sometime in 71 is neither of those. From mid71 through 72, they were then installing a part that they supposedly did not have in the system. Obviously we are seeing holes in GM documentation. I'm finding that interesting.

Mike------


Removal of a part from SERVICE does not necessarily mean it's also removed from PRODUCTION. This is especially true for standard parts like fasteners. There are a huge number of fasteners used in PRODUCTION that are never even available in SERVICE. GMSPO often consolidates SERVICE-available fasteners. For example, there may be two fasteners with different part numbers that are used in PRODUCTION and which are identical except for finish. GMSPO will usually only offer one of them (usually, the one with a zinc finish).

Whatever the screw used in PRODUCTION in this case, that screw had a GM part number, although very possibly a part number never available in SERVICE. It might be one that was used for some other application on the cars and, thus, normally available at St. Louis. For whatever reason, it was used for this application for some period of time. I do not expect that there was a whole lot of "inspectional scrutiny" applied to a part like this to ensure it conformed to the AIM.

[Terry M.]

Re: Wanted: early 1970 AIM info

Mike------


Removal of a part from SERVICE does not necessarily mean it's also removed from PRODUCTION. This is especially true for standard parts like fasteners. There are a huge number of fasteners used in PRODUCTION that are never even available in SERVICE. GMSPO often consolidates SERVICE-available fasteners. For example, there may be two fasteners with different part numbers that are used in PRODUCTION and which are identical except for finish. GMSPO will usually only offer one of them (usually, the one with a zinc finish).

Whatever the screw used in PRODUCTION in this case, that screw had a GM part number, although very possibly a part number never available in SERVICE. It might be one that was used for some other application on the cars and, thus, normally available at St. Louis. For whatever reason, it was used for this application for some period of time. I do not expect that there was a whole lot of "inspectional scrutiny" applied to a part like this to ensure it conformed to the AIM.

This is one of the reasons the best learning tools for "how they were built" is reasonably original cars. And a reason the Bow Tie/Crossed Flags program is so important.