Gassy Pig?

[PabloCruise]

I'm sure they are 5mx.8m. It's what Toyota seems to use the most. Pretty easy to find. If you want to wait on the mail, I can send you some.

Thanks Ron! I put in a message to Onur to see if Mr T still sells these. The heads on mine were so abused that they could not be tightened down much. This might be why the tank is wetting itself when fuel is sloshing around. I had been keeping it as full as possible to avoid getting moisture in there over the winter.

just make sure to use a fuel rated gasket material(sure you already figured on that)...the filler neck hose might also be staring to crack after 40 some odd years...I had decent luck digging thru the hose stock at my local napa...

Well I know the overflow hose off the metal portion of the fill neck is bad. It drips if I over-fill. I am going to call NAPA and the Parker Store here on my lunch break and see what they have.

And yes on the fuel rated gasket! I would pay the $ for a factory piece if still available. That one lasted close to 40 years, so I figure another one would be worth the $.

 

[PabloCruise]

just make sure to use a fuel rated gasket material(sure you already figured on that)...the filler neck hose might also be staring to crack after 40 some odd years...I had decent luck digging thru the hose stock at my local napa...

I think my hose is doing okay (is it okay to post pics of my old hose on here?), but that overflow hose looks like it is collapsing or crimping on itself. That doesn't look too cool!

 

[bobm]

Mine is only GASSY when I am sitting in it.

 

[scrapdaddy]

Too many Buds! Bob

 

[bobm]

Ron, you know it aint the BUDS. Beer is good for you.

 

[PabloCruise]

The cool news is that the screws and the gasket are still available. Beno is sending me both.
I think I will cover both sides of the gasket w/ some petroleum jelly and then rinse the outside of the tank to see if it stops wetting.
I'll replace the overflow hose at the same time and see if this gets rid of the gasoline odors...

 

[PabloCruise]

I love new parts!
Pics of the part numbers in case it helps anyone.
I realized I probably don't want to pull that overflow hose that connects to the neck while the tank is full, so I will replace the gasket, wash the outside of the tank, and then drive her for a while until the level in the tank goes down.

 

[PabloCruise]

Well I got back at the top of the tank yesterday and replaced the gasket and the screws.

I ran a little bit of plumber's grease around both sides of the gasket, and with nice, new screw heads, I could actually tighten the sender down. I also rinsed the top of the tank around the sender and dried it off with paper towel so I could detect if the tank still wets itself around the sender opening.

I drove the Pig to work today and did some errands at lunch. The gasoline smell back by the tank is diminished, but I can still smell it to a degree.

I may be a little too aware of the problem as I am definitely smelling for it (I think a few co-workers are even more concerned about me now), but it never seems like a good idea to have combustible vapors under your vehicle, eh?

I still want to replace the overflow hose that connects the fill neck to the tank, but my guess is that I am leaking around the sending unit. I will pull the cover later and see if it still looks like it is wetting itself around the sender. In which case I will be pulling the tank... :-(

 

[PabloCruise]

It sounds like it can be difficult to pass the overflow hose through the hole in the body opening, and then also difficult to secure the line to the tank.

Based on here: Fuel Inlet Hose

Hoping I can pull this off w/ a minimum of heartache.

 

[scrapdaddy]

Pablo,

One of my biggest time consumer, on the hoses, were buying aftermarket hose that was a different OD and then sourcing the right grommets.

 

[BBQ BOY]

I am having a pressure issue as well. The gas exploded out of the gas fill valve when I removed the gas cap. So, I read through this thread and am not really sure if I know what my problem is, but one thing I do know after researching the parts associated with the fuel system is that nothing is available for these damn trucks. Makes me want to go ahead and sell it and get a 40 or 60 series.

 

[Napster]

I am having a pressure issue as well. The gas exploded out of the gas fill valve when I removed the gas cap. So, I read through this thread and am not really sure if I know what my problem is, but one thing I do know after researching the parts associated with the fuel system is that nothing is available for these damn trucks. Makes me want to go ahead and sell it and get a 40 or 60 series.

Don't do it! As my wife would say, the hunt is all the fun! If you wanted something where you could go down to Napa and buy all the parts you need then you would own an f150... Pigs are challenging and that is why we are the few, the mad, the iron pig preservation society!

 

[PabloCruise]

I am having a pressure issue as well. The gas exploded out of the gas fill valve when I removed the gas cap. So, I read through this thread and am not really sure if I know what my problem is, but one thing I do know after researching the parts associated with the fuel system is that nothing is available for these damn trucks. Makes me want to go ahead and sell it and get a 40 or 60 series.

Hang in there mate! If I were you, I would check the function of the tank vent lines. Are they connected to the evap device, and is that connected to the charcoal canister? I think your Pig is a '76, eh? In which case there should be 4 tanks vent lines exiting the tank on the driver side, top, towards the rear. Make sure these are freely venting to the device I have pictured on page 1...

 

[PabloCruise]

Pablo,

One of my biggest time consumer, on the hoses, were buying aftermarket hose that was a different OD and then sourcing the right grommets.

Ruh-roh Raggy! That does not enthuse me! I wonder how different our Pigs are where the lines pass through the body opening?

 

[tucker74]

Pablo,

What did you do for your fuel pump with the 3FE? I remember with mine I was recycling a lot more fuel back to the tank with the Aeromotive electric pump then the old manual 2F fuel pump. You need to make sure all the vapor system is working well, you can also buy a cheap gas cap and put a pin-hole in it. This will allow the vapor to vent outside, it solved my problem until I could fix it right

Tucker

 

[BBQ BOY]

Hang in there mate! If I were you, I would check the function of the tank vent lines. Are they connected to the evap device, and is that connected to the charcoal canister? I think your Pig is a '76, eh? In which case there should be 4 tanks vent lines exiting the tank on the driver side, top, towards the rear. Make sure these are freely venting to the device I have pictured on page 1...

Mine is a 77'. I was able to source some of the fuel parts last night with valves, believe it or not. I will try to figure out how to pull the panel off the rear to see if everything is connected properly.

 

[PabloCruise]

Pablo,

What did you do for your fuel pump with the 3FE? I remember with mine I was recycling a lot more fuel back to the tank with the Aeromotive electric pump then the old manual 2F fuel pump. You need to make sure all the vapor system is working well, you can also buy a cheap gas cap and put a pin-hole in it. This will allow the vapor to vent outside, it solved my problem until I could fix it right

Tucker

Can you refresh my memory Tucker - were you having a problem with the tank leaking, or vapors escaping?
I put the external fuel tank on, I think the original app was a Ford F-250. Replaced the FPR and once the return line was cleared the pressure in the rail was dead on.
I would hope with 4 vent lines the tank can vent alright, but as Reagan used to say, "Trust, but verify". I guess I should empty the tank and see if I can blow back into the vent lines.

 

[tucker74]

I was having issues with excess pressure building in the tank due to the amount of fuel cycling back to the tank through the return. I had perfect fuel pressure to the injectors, but my stock vapor recovery could not keep up. I put a pin hole in my fuel cap to make it "vented" until I could install a larger canister from a 62.

Tucker

 

[davegonz]

Vented gas caps are also fairly cheap. I got a Stant one for my old 40 and it worked well.
NAPA one:703-1034
STANT Part # 10646 {Regular Fuel Cap - 2 3/16" Vented Anti-Surge (1 3/8" x 1 1/4" Shallow Cam) #11646}

 

[PabloCruise]

I was having issues with excess pressure building in the tank due to the amount of fuel cycling back to the tank through the return. I had perfect fuel pressure to the injectors, but my stock vapor recovery could not keep up. I put a pin hole in my fuel cap to make it "vented" until I could install a larger canister from a 62.

Tucker

Jinkees, I did not think that the size of my can could be a problem.

Now that I type that, it sounds like you could take that a number of different ways...

But if my charcoal can is too small, the tank could be building pressure even though the vents and evap manifold are functioning properly? And then the excess pressure causes my tank to wet itself wherever it can?

Hmm...

Is the 62 can a lot bigger/or more free flowing than the 55 can? If the charcoal matrix in the can is intact, it should not restrict flow in, should it? I have never checked the back-pressure on one of those cans.