Factory AC. Holder for evaporator inside evaporator casing

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Thanks Scott I see. Well no need for me to worry about that part since it sits on the evaporator.
It reminds me a bit of of AC blower box stud plates and rivets on the picture below

Claus,

If you are looking for the stud plates, the small ones (like those used for the under-dash heater distributor) are reproduced, but I don't think the bigger "T-studs" for the C60 Evaporator housing are reproduced. I had to repair one of mine, and it doesn't look quite right, so if you find a good replacement, please let me know.

As for the long stud-plate in your picture, you might be better off fabricating that part yourself, if you can get accurate dimensions. Mine is still on the car, but the car isn't with me at the moment. I can get the measurements for you eventually, just not sure how soon. One of the members here recently had a complete C60 system available on the auction site, and part of his listing said "4) Includes the rare inside the "A" pillar recirculating air ductwork, the rh kick vent and mounting bracket and the upper stud bracket required to mount under the rh wiper grill so studs are there for mounting outer box." (emphasis mine)

You might be able to get measurements for the longer stud-plate from him, the eBay listing is ended now but can still be found if you search for listing number 140779263071.

Along with the dimensions, a trace-outline would be helpful, scanned at full size to pdf, which could then be emailed to you for a pattern.

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Claus,

The GM books show that the 3000091 elbow tube was also used on 1964 Chevelles "with Custom Deluxe", 1964-66 Passenger cars w/C.A.C., 1967 Camaros with C.A.C., and probably others.

One of the Parts History books says "3000091 to GM 3013475" in June of 1974, and GM 3013475 turns out to be the 1968-1982 Corvette C60 blower motor elbow tube mentioned previously (post 15), but the parts books after 1974 do not show GM 3013475 as being applicable to 1964-1967 Corvettes, so I'm not sure if what Doc Rebuild has would work as a functional replacement.

There has to be a lot of good used examples of GM 3000091 out there, if you check around.

[Bill C.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Claus,

If you are looking for the stud plates, the small ones (like those used for the under-dash heater distributor) are reproduced, but I don't think the bigger "T-studs" for the C60 Evaporator housing are reproduced. I had to repair one of mine, and it doesn't look quite right, so if you find a good replacement, please let me know.

As for the long stud-plate in your picture, you might be better off fabricating that part yourself, if you can get accurate dimensions. Mine is still on the car, but the car isn't with me at the moment. I can get the measurements for you eventually, just not sure how soon. One of the members here recently had a complete C60 system available on the auction site, and part of his listing said "4) Includes the rare inside the "A" pillar recirculating air ductwork, the rh kick vent and mounting bracket and the upper stud bracket required to mount under the rh wiper grill so studs are there for mounting outer box." (emphasis mine)

You might be able to get measurements for the longer stud-plate from him, the eBay listing is ended now but can still be found if you search for listing number 140779263071.

Along with the dimensions, a trace-outline would be helpful, scanned at full size to pdf, which could then be emailed to you for a pattern.

Hi Claus,

I have all those stud plates available if you need them, just contact me

Bill

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Thanks for helping me
Bill great if i can buy the stud plates from you

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Found this one at Werners Corvette parts but it looks like the one i have. The tube is one part and the metal fastener is another part it looks like


Found one on ebay that might be the right one

http://www.ebay.com/itm/Corvette-Original-A-C-Fan-Blower-Motor-Cooling-Tube-Elbow-Assembly-AC-1968-78-/190628795765?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c625c9575&vxp=mtr

Is the vacum from the heater valve on the inner plenum(see red arrow on picture)


Supposed to connect to the STV valve(see red arrow)

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Claus,

That is the vacuum switch in the upper photo, on top of the distributor assembly. For some reason it is not shown (or called out by part number, at least not that I have found so far) in the 1964 AIM. The 1963 AIM has an arrow labeled "C" pointing to that section of the distributor assembly and the following page gives the "View C" in large detail. The 1965-1967 AIMs include the "View C" on the same page as the the distributor assembly, but the 1964 AIM appears to have left it out.

In 1963, the vacuum switch was GM 3839651 (Item 21, C60, Section 13). For 1965-1967 (C60, E5 in 67AIM) the vacuum switch was GM 3859356. I don't know which one is correct for 1964, but someone here will.

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

The tube from Werner's and the example on eBay look like the 1968-1982 version. The 1963-1967 version has a different angle to the tube, and the flange has more of a rounded point at one side (where the example in your earlier pictures is broken), rather than being squared off.

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Thanks for helping me Scott

I went out to have a look if there was any part left of the cooler elbow for the blower motor.
I found half of the part of the tube that is secured to the blower motor housing using 2 screws
So now i have made a cardboard template so i can make the metal part the goes over the elbow myself
It looks like the fan motor cooler elbow is two parts. The elbow tube and the the metal part which you attach using 2 screws

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Thanks for helping me Scott

I went out to have a look if there was any part left of the cooler elbow for the blower motor.
I found half of the part of the tube that is secured to the blower motor housing using 2 screws
So now i have made a cardboard template so i can make the metal part the goes over the elbow myself
It looks like the fan motor cooler elbow is two parts. The elbow tube and the the metal part which you attach using 2 screws

Claus,

The 1963 AIM (Section C60, Sheet 11) calls out GM 3156529 elbow tube (item 29), but the 1964-1967 AIMs all call out GM 3000091 elbow tube. The AIM drawing for this part looks the same in all years, and even the '63 AIM only depicts one screw, but the second screw may be implied. When the p/n was changed for 1964-67, it may have been considered unnecessary to update the drawing.

I have never seen a 1963 C60 blower motor cooling elbow tube, but that would explain the two screws on your example instead of one. The part number for the elbow tube for 1964-1967 (GM 3000091) is in raised numerals on the flange of the part itself on mine (see picture #1 below), followed by the word "KISIEL". So if the one you have was also GM 3000091 then they must have substantially redesigned the elbow tube at some point (from needing two screws down to one) without changing the part number. I think this is unlikely, which is why I suspect what you have is the 1963-only elbow tube.

As for one part vs. two, my GM 3000091 appears to be one part cast as a whole, but all of the AIMs (63-67) do refer to it as a "Tube Asm".

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

It looks like the fan motor cooler elbow is two parts. The elbow tube and the the metal part which you attach using 2 screws

Claus,

On my '67 blower motor "donut" housing (for lack of a better term for the part in your picture above), the single screw attaching the GM 3000091 elbow tube was at the left-hand location, away from the opening that attached the "donut" to the main Evaporator housing. The right-hand screw hole closest to the opening (occupied by the RH elbow tube screw in your photo) was used by the Bracket that secures the "donut" housing to the Evaporator housing.

In the 1964 AIM, Section C60, Sheet D4, you can see this Bracket depicted in the AIM drawing, with one end of the bracket attaching to the main Evaporator housing box and the the other end attaching to the Blower Motor "donut" housing. Being part of the Evaporator/Blower Motor Assembly, this Bracket and the attaching screws are not called out individually in the AIM.

It looks like you have the correct screw-holes in the correct locations. If what you have is a 1963 elbow tube that used two screws to attach, they must have installed the "donut" end of the Bracket over the elbow tube screw hole in 1963 only, using one screw to secure both parts to the "donut" at that location.

If anyone with knowledge of the differences between '63s and '64s with C60 could reply, that would be helpful

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

On the 1964 the part where the screws goes is not attached to the tube(probably not the newer ones as well)but it is fastened with 2 screws as you can see on the template on the picture
I will make the metal flange for the cooler tube tomorrow. Should not be difficult to make the flange

I saw the complete AC for the C2 you linked to on ebay and i suppose that factory AC parts must be some of the most pricy for a C2
Does the 7 blade fans on the pictures below look like the originals?

LIC 7 blade fan


OldAir 7 blade fan(does not have circular holes for the bolts and does not have the opening in the center)

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

On the 1964 the part where the screws goes is not attached to the tube(probably not the newer ones as well)but it is fastened with 2 screws as you can see on the template on the picture
I will make the metal piece that fasten the fan motor cooler tube tomorrow. Should not be difficult to make that part

I saw the complete AC for the C2 you linked to on ebay and i suppose that factory AC parts must be some of the most pricy for a C2
Does the 7 blade fans on the pictures below look like the originals?

LIC 7 blade fan


OldAir 7 blade fan(does not have circular holes for the bolts and does not have the opening in the center)

Claus,

I'm not familiar with the C60 fan (GM 3853943, Section C60, Sheet C2) for 1964. It is described in some detail in Adams, p. 216-218, but no photos are shown. Unless the one from LIC is NOS, I would try to hunt down an original (or NOS) example, only because:

A) I don't have reason to believe that anyone has made the fan more effective (different blade angles, etc.) than GM did, and

B) I don't have reason to believe that any reproduction would faithfully replicate the blade angles and other aspects that will determine whether your engine stays cool (or not)

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Scott. It looks like it is one for the early 64(one vacum tube is thicker)and one for the late 64(same size on the tubes for the vacum)

Claus,

That is the vacuum switch in the upper photo, on top of the distributor assembly. For some reason it is not shown (or called out by part number, at least not that I have found so far) in the 1964 AIM. The 1963 AIM has an arrow labeled "C" pointing to that section of the distributor assembly and the following page gives the "View C" in large detail. The 1965-1967 AIMs include the "View C" on the same page as the the distributor assembly, but the 1964 AIM appears to have left it out.

In 1963, the vacuum switch was GM 3839651 (Item 21, C60, Section 13). For 1965-1967 (C60, E5 in 67AIM) the vacuum switch was GM 3859356. I don't know which one is correct for 1964, but someone here will.

[Scott S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

Scott. It looks like it is one for the early 64(one vacum tube is thicker)and one for the late 64(same size on the tubes for the vacum)

Claus,

The vacuum switch p/n called out in the '63 AIM (GM 3839651) does not appear in the P&A catalogs until 1964, probably because the addition of C60 to Corvettes in 1963 model year did not occur until late production, some time after the October '62 printing of the P&A. The 1964 P&A says GM 3839651 vacuum switch is applicable to 1963-64 Corvette.

The '65 P&A shows the newer GM 3859356 vacuum switch for 1965 Corvette (which was also then applicable to 66-67), and still shows the older switch (GM 3839651) applicable to 1963-1964 Corvettes. The newer switch (GM 3839651) eventually shows up as being applicable to all 1963-1967 Corvette in the 1974 parts book, in Group 9.280. It may have happened the previous year, I don't have the '73 catalog.

[Claus S.]

Re: Factory AC. Holder for evaporator inside evaporator casing

I just looked at the AIM for the 1964 AC and you are right. The tab that holds the cooler elbow is secured with one screw only so iahve to make the template
like that(the tab goes around the tube and my does not so it is broken)
I will make the tab so it looks like the one marked in red on the picture