Buick T-Type chassis Fuel Line Question

[vankitcars]

If someone who has knowledge in these parts please chime in, it would be greatly appreciated.

Never worked on a T-Type before.

Friend was complaining of fuel literally dripping onto his mufflers/rear axle.

So i jacked it up, crawled underneath. Above the rear axle, where the three metal fuel pipes that come from the fuel tank, then connect to 8" rubber hose section, then back to metal pipes that seperate to Left side chassis pipes, and right side chassis pipes...

1 thick (3/8) pipe and 1 thinner (1/4) pipe lead to passenger side
1 thick (slightly less than 3/8) pipe lead to driver side


my question is, on the passenger side, thick and thin pipes, do the pipes change size down the length of the car?
does the thin pipe, get thicker, and does the thick pipe get thinner, visually?

I would assume the thicker 3/8" would be the feed to the rail and stay 3/8 all the way to the front, but it doesnt look the case.

 

[vankitcars]

here is the best way to point it out.

does 1 and 2 cross over at the ?? point. and then 2 becomes bigger than 1 visually?

 

[vader87]

#3 is fuel feed, #2 is fuel return and #1 is vapor return from the charcoal canister.

 

[vankitcars]

#3 is fuel feed, #2 is fuel return and #1 is vapor return from the charcoal canister.

#3 cant be feed. please look at this:

 

[vader87]

The largest is the fuel feed and runs on the driver side of the frame, away from the down pipe. The return and vapor run from the driver side of the engine, though the cross member and down the passenger side. I just did this last month.

 

[vader87]

fuel by Robert Griffin, on Flickr

 

[vader87]

11856d1133544251-rusty-fuel-lines-g-body-frame-2 by Robert Griffin, on Flickr
10050d1126648567-brake-lines-help-required-results-all-g-body-frame-1 by Robert Griffin, on Flickr

 

[vankitcars]

Thank you very much Vader87.

I see what I was doing wrong.

the three chassis pipes, that we previously labelled 1,2,3.
looked 123, but was actually
3,2,1 in my vehicle as the same with your picture.

the fuel feed line was resting the closest to the passenger side wheel, so it looked like 1, but was actually 3. and the vapor 2 was next, then return 1.

What I thought it was....

then what it really was..

 

[jiho]

Almost ....

As you have the lines numbered in your bottom diagram:

#3. 3/8" on driver's side -- fuel feed (filter is just ahead of rear axle in vader87's frame shot).
#2. 1/4" on passenger side -- fuel return.
#1. 5/16" on passenger side -- vapor canister.

Note 1: #3 in your bottom diagram maps to #1 in your pic of the sender unit fittings, and vice versa. You have them all identified correctly in your sender pic, but numbered differently.

Note 2: The location of the fuel filter depends on year. vader87's is the '86- '87 version (Intercooled). The '84-'85 version (Hot Air) had the fuel filter mounted at the front of the motor, driver side.

 

[vankitcars]

Almost ....

As you have the lines numbered in your bottom diagram:

#3. 3/8" on driver's side -- fuel feed (filter is just ahead of rear axle in vader87's frame shot).
#2. 1/4" on passenger side -- fuel return.
#1. 5/16" on passenger side -- vapor canister.

Note 1: #3 in your bottom diagram maps to #1 in your pic of the sender unit fittings, and vice versa. You have them all identified correctly in your sender pic, but numbered differently.

Note 2: The location of the fuel filter depends on year. vader87's is the '86- '87 version (Intercooled). The '84-'85 version (Hot Air) had the fuel filter mounted at the front of the motor, driver side.

Yes you are correct. The V and R label was backwards.

Car running fine now, finished it yesterday