Builds My New Project (1 Viewer)

[NikP]

I ordered a 2 inch filler neck and cap from Fillerneck Supply hoping to solve my full tank fuel spill down the side of my 55.

The install was relatively straight forward. I had to cut some of the filler neck away and install rivet nuts. (What did I ever do before I bought a rivet nut tool?)

After all my work, I still have my full tank dribble down the side. Hmmmm.

Is it the new cap? Or is it my fuel return line that I installed for the LS motor? My tank is before charcoal canisters so it has two vent lines to the filler neck and that’s it. The new filler neck has one nipple so it just tee’d the two hoses together. Since I brazed a return line fitting on the tank, could it be pressuring the tank and pushing fuel out the cap? The cap is vacuum vented so I would assume pressure would close off the cap vent and no fuel should escape via the cap. At least that’s my logic on the topic.

 

[scrapdaddy]

Just spit balling, but couldn't you take one of the filler neck vent lines and reroute it to a charcoal canister or at least to the atmosphere, so the tank doesn't build pressure?

 

[NikP]

I’m spit balling also. I’m not even sure it’s even being pressurized. I’m just wondering if I introduced the problem? I kind of expected the stock vented cap would leak but didn’t expect the new one to do the same.

I’ve read a little about a roll-over check valve to install in a vent line but they say to have the valve higher than the filler neck and outside the vehicle. I’m not sure how to achieve that.

I’ve thought about a charcoal canister but not sure what would be involved. I would install one if I knew that would solve my issue. The hard part is zeroing in on the cause. Maybe the easy route is buy another cap and see if it continues. I’d like to figure out how I can test the cap I have to see if it’s functioning like it should.


Fuel only seems to dribble out when going down the road so I assume sloshing is the cause vs pressure. If it were pressure I would see it dribble while idling.

 

[Megadoomer]

I think it is the slosh. Mine does it too when I have a full tank. I still have a crap cap that doesn't seal. I know my tank is vented well. Spent a lot of time on that.

 

[scrapdaddy]

I use a non-vented screw in cap and can put 60 gals. in my 55 gal. tank with no problems other than paying for it. I do have a vent line running to a canister up front and the stock emissions tank in the cargo space.

 

[NikP]

What two colors did you use on the 55?

I think it is the slosh. Mine does it too when I have a full tank. I still have a crap cap that doesn't seal.

I think I have the same cap as @scrapdaddy if I remember from his post. The guys at Filler Neck Supply wanted me to update them if it was more the "residual" gas that dribble out during filling. I think this was more than residual, so we will see what they say.

@scrapdaddy where do you connect the vacuum line from the canister to your intake? A canister wouldn't hard to install. The one the SBC on my 40 I connected the cannister at the throttle body but on the 5.3 I'd have to study where it goes.

 

[Megadoomer]

VTA baby.
There is the 3/8s that vents the back of the driver side head in to the top of the Vortec intake. Maybe you can put a tee in that.

 

[scrapdaddy]

where do you connect the vacuum line from the canister to your intake?

Right to the air cleaner...

 

[NikP]

Nice thanks.

VTA? Not sure what that stands for. I'm also curious if it could connect in to the vacuum booster hose? I plugged it when installing the hydroboost. I did a quick search and stock motors have a purge solenoid on the intake. It seems hooked to the ECU but I think all mine got eliminated.

 

[Megadoomer]

Vent to atmosphere. It's typically a snail thing. Turbos.

 

[NikP]

Since I'm more convinced this is a venting issue, I think I'm going to try running one of the hoses that went to the orginal filler neck into an in-line roll over vent valve. Based on this diagram from Tanks Inc. it looks like I can install the valve in the existing hose and it would be vertically oriented within the cargo compartment and I can continue to the hose up and over my filler neck and then route it back out to the frame to be vented (VTA baby). Since it says the hose has to be higher than the filler neck it looks like I can accomplish this.

 

[NikP]

I focused today's energy solving a very important issue for my coffee getter... where to put the coffee. I ordered a console from Cruisercrap back in early March and it's still not available so I started looking around at alternatives. I ended up spending $45 on Amazon for this. It's nothing special but it gives me couple cup holders front and rear and a place to throw a cell phone. It locks but, it's also made of plastic so the lock is only a 10-second diversion.

For the price, I didn't feel too bad about custom trimming it to fit better around the tunnel area. I like the outcome.
I plan on trimming a piece of Kydex and gluing it inside to make sure things don't disappear in the tunnel area void where I cut it to fit the hump.

 

[scrapdaddy]

Nice!

 

[RUSH55]

Looks right at home. Cup holders are pretty essential. Countless horror stories of spilled coffee on the way to work - testify!!

 

[bobm]

What kind of seats you got ??

 

[NikP]

What kind of seats you got ??

If recall correctly, they came out of a 2017 Chevrolet Impala. Picked them up off Craigslist for $200 and they were still in factory wrapped plastic.

 

[xtiaan2000]

Looks great! Don’t need much else.

 

[bobm]

Why don't we have more pics of the Finished product

 

[NikP]

Why don't we have more pics of the Finished product

Building anticipation. .

 

[bobm]