fuel tank vent line access

[llhat]

Question

Can the fuel tank vent hose connections be accessed without completely dropping the tank?

 

Have one hose that mysteriously became disconnected,  no problem until I filled the tank, and then... leako...

 

[89 MJ]

No idea if you’ve got a long bed or a short bed, but here’s a picture of my short bed tank. The one farthest from the camera would be the passenger side rear of the tank and the one closest to the camera is the driver side front. I don’t think you’ll be able to get to the front one without pulling the tank, but it might be worth a shot. 

[llhat]

long bed,  the rear one....   now unsure IF from that vent or fuel sender....  recent fuel pump

replacement hired out...  believe it is going back to them.  was not full of fuel on return,

drove it around a bit to see how it worked and get a known position on fuel gauge before filling

only rounded off to next tenth gallon or so,  did not pack the tank.

 

discovered leak.

 

[89 MJ]

The fuel sender is on the side of the tank, so you might be able to see where it is leaking from. Getting that seal in the right place can be tricky sometimes, so I would lean towards it being the sender. But it would also leak before the tank is full too. 

[llhat]

agree, and it did not leak before filling, such are my suspicions of the vent on top that is more difficult to access... ( murphy's law)

[Eagle_SX4]

Was it leaking while sitting on flat ground or just after a turn? The roll-over valve won't leak if it is just sitting (on level ground) they are the highest part on the tank. The most likely suspect is the o-ring on the sending unit.

[llhat]

flat ground drips on concrete accumulated drip on bottom of tank but bottom of tank is solid, not rusted out...

 

and it did not leak before first fill-up /  nor while driving after pump replacement.

 

 

[gogmorgo]

Mine leaked from where the filler nose connected to the tank, but the tank also had a rusty spot on the side that was constantly wet with gas. I put a new tank in it. 
 

The tank straps hang from the bed, so you either need to drop the tank or cut a hole in the bed to see the top of the tank.

The tank isn’t that bad to drop as long as it isn’t full. if you don’t want to drive it until it’s almost out of fuel, disconnect the fuel line and run it into a container, and jumper the fuel pump relay. Wire brush the strap bolts and hit them with penetrating oil the day before you drop it. They’re hanging from J-bolts so you don’t need to back the nuts all the way off, just far enough you can lift the j-bolt out of the hanger. 

[llhat]

thank you for the additional responses.  am aware of techniques with removal, as well as using jumper for pump.

 

sending back to folks i hired out to replace pump recently...   did not DYI as I just did not want to lie on

gravel to man-handle this thing.

 

I DID years ago replace the tank myself after a rust hole was developed from contact with skid plate insulators,

a new tank....  and years ago replaced pump myself... but just not this time.

 

should be able to update next week.