1978 FJ40, Fuel Line/Leak Question (1 Viewer)

[oslivin]

Hi all!

So, I noticed recently when I park my 40 in the driveway, which is at a slant, I get a fuel leak onto my driveway. When the vehicle is parked on flat pavement/ground, there are no leaks. Thoughts on what may be the culprit?

Thanks!

 

[sggoat]

which way is the slant? You should be able to look under the truck and see where it's wet, and trace back to the source--

 

[mattressking]

Look under the truck and trace the leak….that’s the only way to diagnose. Look up from the puddle.

 

[EWheeler]

Look under the truck and trace the leak….that’s the only way to diagnose. Look up from the puddle.

You're too kind.

 

[oslivin]

I usually park the rig facing down hill. With the ass end up and the nose down. I'm going to put her back on the slant tomorrow and trace the source a little better. Was hoping for the "oh hell, I had that same problem" answer ahahah.

 

[mattressking]

You're too kind.

That’s my middle name (my parents are hippies)

 

[65swb45]

That’s my middle name (my parents are hippies)

Helps explain the avatar.

 

[fyton2v]

The mattressking abides.

The good news is that fuel doesn’t take a complicated, mysterious path through your truck. It’ll only leak from a handful of places, which are generally visible and not very hard to repair. Hopefully the inside of your truck doesn’t reek of gas after it’s been sitting. That would be a pain, but a good clue that your tank is leaking,

 

[peesalot]

I thought the avatar was you, sandal king.

 

[corcel]

If you don't see it coming from your lines, it might be the tank itself. I had pinholes midway up the tank along the seem that would leak at an angle.

 

[65swb45]

While you’re at it, sniff your dipstick. A failing fuel pump could be putting as much fuel in the crankcase as leaks on the ground. I drained 11 quarts of soup out of a client’s engine once. Engine bearings were toast.

Surprised no one else mentioned this possibility. It’s pretty well known.

 

[peesalot]

Another question, how much tilt ? If the sending unit is up front on tank and tank is full I would go there first.

 

[77mustard40]

Check the weep hole on the bottom of your fuel pump, it will leak prior to pump failure.