GT Vent line Access and Replacement

[Welsh Wizard]

After breathing Shells finest for several hundred miles I had to give in and get the job done right.
Initially I tried removing a speaker from the rear shelf/panel below the spare wheel which gave me access to the fwd R/H vent tube, not able to remove the hose clamp from here I tried to 'save time' and cut and graft into the remaining line....bad idea! Bite the bullet and just pull the shelf all together.
Replace every piece of vent line as if they have not turned to dust at this point sure enough they will before you reach your next birthday.
See attached pictures. I hope this helps someone who may well be experiencing the same issue.

..and remember use good quality fuel resistant hose.

[Gumby]

I was REALLY happy to find that the previous owner of my GT had already gone to the trouble of having all of those lines replaced back '94. Although I don't remember seeing a connection like in the fourth picture. What year is your GT?

[Welsh Wizard]

The lay out looks stock: Forward R/H corner of tank, Aft L/H corner of tank, Filler neck connection all linking together and running into the line which connects to the cannister in the nose of the vehicle near the battery shelf.

Maybe they (GM) changed the layout over the years, perhaps other members can clarify this point.

[Welsh Wizard]

Gumby, Your motor is injected? This would possibly explain the difference in Fuel line layout. No?

[Gumby]

Originally Posted by Welsh Wizard Gumby, Your motor is injected? This would possibly explain the difference in Fuel line layout. No?

It's not injected yet. It's a 72 so no stock fuel injection. It's possible the previous owner changed the way it ran or that my memory just isn't correct. I'll take a look tonight and see if that connection exists.

[BQS4]

Derek;
I feel your pain, but, this is one of those jobs that when you're done, the grin on your face will take a while to go away.. I have done both a GT and a Sportwagon. At least on a GT you don't have to remove the tank, the Manta/Ascona/Sportwagon you do. I'll pass this little tidbit of info on for the Manta/Ascona/Sportwagon owners, especially the carb'ed car owners, there's 14ft, yes FEET of hose back there, and if one. breaks, you might as well bite the bullet and do it all. You'll be happier for it.

[baz]

btw no stock injected GT they stopped making them well before the injection engines came into use

[Crazy Harry]

Welsh Wizard's arrangement is the stock configuration from what I have experienced. The fitting in the fourth picture is a tee. See the following helpful link:

http://clubs.hemmings.com/clubsites/...h/TankVent.pdf

I've done the vent line replacement as well with a huge difference in interior smells! Works best if you take the spare shelf out. Like everyone has said, once you're in there do them all!

Harold.

[ungermm]

Looks like the replacement hose is reinforced vinyl. I have used this type of hose many times for liquid pesticide spray hose replacement. However, I wonder if it will last much longer than original hose when exposed to gas vapor. Anyone use this type of hose before and how well has it held up?
Jerry

[RallyBob]

Originally Posted by ungermm Looks like the replacement hose is reinforced vinyl. I have used this type of hose many times for liquid pesticide spray hose replacement. However, I wonder if it will last much longer than original hose when exposed to gas vapor. Anyone use this type of hose before and how well has it held up? Jerry

A lot of the reinforced hose is rated for oil or chemicals, but I have yet to see any rated for gasoline.

I used gasoline-rated hose (Tygon/PVC) I got from McMaster-Carr when I redid a Sportwagon's gasoline vapor lines. It's a translucent bright yellow hose.

[hrcollinsjr]

Originally Posted by RallyBob I used gasoline-rated hose (Tygon/PVC) I got from McMaster-Carr when I redid a Sportwagon's gasoline vapor lines. It's a translucent bright yellow hose.

I had looked for Tygon in my Uncles small engine shop and didn't find any of the correct size. Tygon tubing (smaller version) I believe is commonly used for fuel lines in small engines, string trimmers, chainsaw's, etc.

Thanks for the tip where to find the appropriate size. I'm sure it'll be a bargain to. At least we'll only have to do it once which makes it a bargain.

Harold