72_ Mystery tubing on driver side frame rail

[Steve D.]

We took the body off of a 72 yesterday and found a small diameter metal tubing on the inside of the driver side frame rail running parallel to the brake line. At the front, the tubing ended near the front body mount and had a 6 inch piece of rubber hose connected to it. The owner doesn't remember disconnecting it from anything when prepping for the body removal. At the rear it ends about 10" from the end of the frame. This end did not have rubber tubing and was not connected to any thing either. Someone commented that the frame appeared to be originally for an automatic but had a bracket added to mount the four speed. Any idea what this might be for? Environmental device of some kind?

Steve

[Michael W.]

Re: 72_ Mystery tubing on driver side frame rail

Sounds like the fuel vapour line connecting the fuel tank to the charcoal canister in the drivers side fender well. All 72s had this system.

[Steve D.]

Re: 72_ Mystery tubing on driver side frame rail

Thank you. Shold be able to find that in the AIM; someone looked yesterday but apparently missed it.

Steve--

[Alan S.]

Re: 72_ Mystery tubing on driver side frame rail

Hi Steve,
Mike's right... and it's pretty easy to miss seeing the line in the AIM.
It's in Section 8, Fuel & Exhaust. It's shown on the Section UPC 8 Contents Sheet, and also on sheets B5 and B6 in greater detail.
Regards.,
Alan

[Steve D.]

Re: 72_ Mystery tubing on driver side frame rail

Alan_Thanks alot