70-up vacuum TEE 3/16 x 3/16 x 1/16???

[Rich P.]

Looking to get verification of this application. It is 3/16 x 3/16 x 1/16. The 3/16" ends are at a perpendicular with the 1/16 end as part of the TEE. No numbers that I can see. It has the clear yellowed/aged look. I think I remember it on 70-73-up not sure excatly what year and options.
Any help would be appreciated.

Thanks, Rich

[Joe L.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Looking to get verification of this application. It is 3/16 x 3/16 x 1/16. The 3/16" ends are at a perpendicular with the 1/16 end as part of the TEE. No numbers that I can see. It has the clear yellowed/aged look. I think I remember it on 70-73-up not sure excatly what year and options.
Any help would be appreciated.

Thanks, Rich

Rich------


I believe this is a GM #3970076. It was a tee used in the PCV and/or evaporative emissions system for 1970-73 Corvettes. The originals were the coloration you show. Later SERVICE pieces were black.

[Clem Z.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Looking to get verification of this application. It is 3/16 x 3/16 x 1/16. The 3/16" ends are at a perpendicular with the 1/16 end as part of the TEE. No numbers that I can see. It has the clear yellowed/aged look. I think I remember it on 70-73-up not sure excatly what year and options.
Any help would be appreciated.

Thanks, Rich

try this place. http://www.dormanproducts.com/catalo...index_bkup.htm

[Edward J.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Rich, that tee is over around the wiper door actuator area at least that is where my 72 air car is located.

[Don L.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Rich, that tee is over around the wiper door actuator area at least that is where my 72 air car is located.

Agree, I think, Ed, although it's kinda hard to see the scale in the photo. It looks to me like the tee that feeds the vac to the HVAC in the console. Be careful with it. The small nipple can break easily if you're moving around in the area of the actuator and aren't very careful. Don't ask me how I know...

[Alan S.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Hi Rich,

My 71 follows Don's and Edward's thoughts it has a T with 3 nipples of those sizes but in a different configuration. On my non a/c car the 1/16" nipple is the supply for the heater/defroster control in the shifter plate.
The T is located about under the right side hood bumper on the right side of the firewall. It tees into the yellow striped vacuum supply hose headed to the wiper door relay
Here are a couple of pictures. Note the tiny clamp similar to those on the windshield washer hoses.
I noted Joe's description of the color, the T in this location on my 71 is black.
Regards,
Alan

In the first picture I've pulled the T out from under the hood bumper so it can be seen.
The last picture shows the small hose disappearing through the firewall on it's way to the controller.

[Don L.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Allan, that's EXACTLY how mine looks too - not quite the configuration that Rich's photo shows. I have, however, seen the white "T", with the small nipple on the end rather than in the middle. Perhaps a service replacement?

I can say that when I broke mine, I could only find the white version thru Dr. Rebuild. I found no other new ones, but did (luckily) locate and get a used part, perfectly matching my original as per your photo. When I replaced mine, I made sure I positioned the small nipple in the VERTICAL/DOWNWARD position, thereby minimizing exposure to repeat breakage. (Tip!)

[Dennis D.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

On my non a/c car the 1/16" nipple is the supply for the heater/defroster control in the shifter plate.
The T is located about under the right side hood bumper on the right side of the firewall. It tees into the yellow striped vacuum supply hose headed to the wiper door relay

Right on Alan.. We discussed this at length within the last year I believe.

[Edward J.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

I did take a look at my 72 air car and it as Alan and Dennis shows(black 3 way) in there pic.s , the white one must be a replacement style.

[Joe L.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

I did take a look at my 72 air car and it as Alan and Dennis shows(black 3 way) in there pic.s , the white one must be a replacement style.

Edward, et al------


The different tees shown above are, as is obvious, differently configured and of entirely different GM part numbers. I am fairly sure that the one shown in Rich's original post on this thread is the GM #3970076. This piece was used for the applications I mentioned, although it may well have been used for other applications, too.

The black tee shown in the other photos is the type used in the windshield washer and other HVAC applications. I don't know what the part number is, though.

In general, the white or amber-colored nylon pieces are the older style. For the most part, the black nylon came along later. However, I have no doubt that the black tees shown on-car are original. Nevertheless, they are certainly not the configuration of the piece that was the subject of this thread.

[Edward J.]

Re: 70-up vacuum TEE 3/16 x 3/16 x 1/16???

Joe, I just stated that my tee was like the one Alan and Dennis showed in there pic.s , The 3way tee in Richs pic. must be another tee that is from another part of the car, it is configiration is different.