Where to hook-up hose to empty fuel tank? (Page 1/1)
imacflier JUN 30, 09:17 AM
Hi, Guys,

I need to drain my fuel tank prior to dropping it. Since I am old, fat, and disabled, I REALLY want to avoid crawling under my '88 GT as much as possible!

I know the traditional place to hook up a discharge hose is at the fuel filter, but that requires crawling under the car.....TWICE!

There just has to be somewhere on the top side of the engine that I can hook up a discharge hose and let the fuel pump do it thing.

Please tell me the easiest point to hook up that discharge hose! (Extra points for pics or FSM drawing references!)

TIA,

Larry
imacflier JUN 30, 08:18 PM
Hi, Guys,

OK, in looking at the 22P I think the fuel feed line running from the fuel filter starts as a pipe attaching to the output of the fuel filter, becomes

a 3/8" rubber hose, running to the engine (it is not clear how the hose terminates)

I haven't physically looked yet (tomorrow's task), but is it reasonable to cut the hose somewhere before the schrader valve, hook-up my fuel

discharge line, empty the tank, and SPLICE the original hose where it was cut???


Sounds like it might just work to me, whatcha all think?????

TIA

Larry
Patrick JUN 30, 08:29 PM

There's a thread six positions below yours (as I type this) that appears to be somewhat the same topic.
greenturnedblue JUN 30, 08:32 PM
I wouldn't know how you would splice the rubber lines back together after you cut it but seems like a bad idea
theogre JUL 01, 08:28 AM
You Don't Cut Lines.

Get under the car and Remove rubber hose.

Just splice rubber to "Siphon" hose using any tube scrap etc.
Or if can reach clamps on tank side rubber then remove rubber and attach new hose to tank.

"Siphon" hose can be almost any hose but expect that will be crap because often gas "eats" it.

Small Hose clamps "nuts" are 1/4" not metric. (Bigger clamp "nuts" are 5/16" not metric.)
Problem is tank side clamps are installed before installing the tank in the car and "nuts" are often pointed so hard to access because too close to frame to use most ratchets. Often even hard to access w/ small wrench.

If tank is under ~ ¼ don't bother emptying in the car. 2-3 gallon won't spill and isn't very heavy.

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fierosound JUL 05, 08:41 AM

quote
Originally posted by imacflier:

There just has to be somewhere on the top side of the engine that I can hook up a discharge hose and let the fuel pump do it thing.



IF fuel pump is still working, this is what I have done.
Do this after engine has been off for a few hours, so fuel pressure has dissipated.

Remove fuel rail schrader valve core (same as tire valve stem) where you'd normally connect a fuel pressure tester.
Then slip a rubber hose (5/16" ID I think) over the threaded fitting with a spring hose clamp to secure it. Run hose to your gas container.

At the ALDL connector next to the cigarette lighter, jumper power from the cigarette lighter to the "fuel pump test" terminal to run pump.
Remove jumper once fuel pump starts sucking air. Remove hose and reinstall schrader valve core before you forget and lose it.







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[This message has been edited by fierosound (edited 07-28-2023).]

greenturnedblue JUL 05, 01:19 PM
wouldnt you also need to depress the little pin inside the valve to get it to open?
Patrick JUL 05, 02:04 PM

quote
Originally posted by greenturnedblue:

wouldnt you also need to depress the little pin inside the valve to get it to open?



Not if it's been removed.


quote
Originally posted by fierosound:

Remove fuel rail schrader valve core (same as tire valve stem) where you'd normally connect a fuel pressure tester.

...reinstall schrader valve core before you forget and lose it.
sanderson231 JUL 05, 02:20 PM
greenturnedblue, you use a special tool to unscrew the core of the schraeder valve which has the pin.

I have run AN hose for fuel lines on engine swaps I have done. You can can unscrew the fuel hose at the connection coming from the tank at the lower fire wall. Summit sells an o-ring 16mm power steering adapter (<$10). The o-ring end will screw into the female connection from the tank. The male end is 6 AN. So if you have 6 AN hose and hose end laying around you are all set. I think that Summit also sells power steering adapters that are o-ring on one end and pipe thread on the other. Then use a barbed pipe thread adapter to attach a hose. The larger metal tubing to the fuel rail is the supply line.