69 core support

[black69]

I have seen 2 cores support styles on some unrestored 69s, where is the info on this? Was there more than one supplier?

[JohnZ]

Nope, one support, one supplier - Chevrolet-Bristol Road Stamping (now called Flint Metal Center).

[Steve Shauger]

There is a slight difference (extra holes) on early cars and later cars.

[black69]

I have seen more differences than just holes. Hard to explain unless you see the 2 side by side. There is more metal cut out near the top on a later version.

[hihorse]

can someone post a pic.

[black69]

If someone would take a straight on picture of a 69 core support, on one side of the radiator, top portion only, I could point out the differences pretty easily.
Maybe early cars used 68 core supports, which is strictly a guess on my part.

I bet it was a running change....is what I saw...it necked down for a fabrication reason...right where the core support bends (arches) at the top.

post a picture and I will point out the difference.

[rich69rs]

If someone would take a straight on picture of a 69 core support

From a couple of years ago when I had mine out.  Two pics, one in this post, one in the following post

[rich69rs]

Second pic

[black69]

the first picture is the best one I need. First, notice the 1-1.5" fold over of material on the top of the support in that picture. That remains constant in you picture, from one end of the support to the other. A nice constant fold over dimension.

On mine (and others) that foldover of material necks down to a 1/2"  in the area to the right of the hood pin. It does that for a 3-4" run. Everywhere else its the same as yours except for a small section near to the right of that pin.

with a guess, I would say you have an early car..a guess a best for now... am I right?

[rich69rs]

One more pic - showing the center section in the hood latch area which does neck down as you describe - not constant all the way across.

My RS is an 01C Norwood build and based on VIN # analysis went through final assembly on or about 20-21 Jan 1969.

Also - ignore the "coolant" sticker on the core support.  It shouldn't be there, only the tune up sticker.  When I reassembled the front end, we got that part of the detailing corrected.

[black69]

so ours would be the same in the middle in that last pic, but just picture that neck down you see in the middle to also be down near the hood pin area and thats where we differ.
january (you) june (me).
I leave it up to the experts to disect what changed somewhere between january to june for starters...I have seen both of these core supports on 69s...
I did not look for other changes, maybe there is more....but there is not one constant core support and holes are not the only diff...

[Dave69x33]

Can anyone confirm when the voltage regulator hardware switched from the rubber encased nuts and shoulder bolts, to the securing the regulator directly to the core support with course threaded "sheet metal" screws, P/N-177999, as show in the 69 AIM, UPC Sec. 6, page 90?

The AIM documentation change history shows the (3) screw changed from 9428404 (need to confirm the "8", it's hard to read), on 7/22/68 (again, the "7" is hard to read).  This documentation change may have been a “running change”, meaning that the old hardware would have been used up before switching to the new hardware part number. 

Were there any early 69's that originally used the rubber encased nuts and shoulder bolts?

Dave

[JohnZ]

My 02D Norwood Z/28 support looks like the one in Rich's 3rd photo - 1-1/2"-wide top flange all the way across except for a 4-1/2"-wide section centered on the hood latch support on the rear side where it narrows to 1-1/4" for clearance to the upper fan shroud bracket.

[JohnZ]

The AIM documentation change history shows the (3) screw changed from 9428404 (need to confirm the "8", it's hard to read), on 7/22/68 (again, the "7" is hard to read).  This documentation change may have been a “running change”, meaning that the old hardware would have been used up before switching to the new hardware part number.

The illustration as shown (self-tapping screws, no well-nuts, no separate ground wire like the 68's had) was released on 4-29-68, and had no revisions after that; the only change was a correction of the screw part number on 7-22-68, before production started.

Also, if you go to UPC 12, Sheet A4 for the regulator wiring, there is no indication of the separate '68-style regulator ground wire ever having been in the illustration, or of any revisions removing it since the sheet was released on 4-29-68.

The above makes it pretty clear that the self-tapping screws was the released design for 1969 start of production.

[Dave69x33]

Thanks JohnZ,

All 69's I have seen have had the self tapping screews; however, a number restro catalogs lists the well nuts for the 67-69 Camaro.  I assumed that this was not correct, and wanted to clarify when the self tapping screws went into production.

As always, thanks for your insight on this.

Dave