260ztrunk vapor tank

[aceofspades]

i have gone this before i swear some where but i have a feeling my vapor tank in the trunk is leaking or some thing.

my gaskets are new my hatch seal and tail are fine but when i fill up with gas my car stinks of it inside! is it safe to remove these gas tank lines?

and whats the point of them?

[Jeff G 78]

The tank is likely fine, but the hoses that go to it could be very rotten. Pull the plastic interior panel and inspect the hoses. I'm betting they are the cause.

[jfa.series1]

The purpose of the tank is to collect the fuel vapors coming from the fuel tank and avoid pressure buildup. Check the plumbing, you likely have three vapor lines coming into the collector from different points on the fuel tank. There should be a fourth line, much smaller, at the top of the collector tank that connects to a hard line going back to the engine to burn the vapors. The three main vapor lines will cost about $210-225 to replace (parts cost only at Courtesy Nissan). I just picked up mine this week as part of my resto project. Hope this helps.

[FastWoman]

Don't automatically assume the tank is fine! It might not be. It's a simple part, but mine actually had a leaking solder joint at the lower fitting. I didn't smell fumes but discovered decomposed paint (from the leaking fuel) right around the fitting. My local radiator shop repaired the tank for $30.

If your car doesn't require 100% OEM purity, you can replace the vent lines with non-Nissan rubber. Just be sure it's fuel-compliant. You might have trouble finding 5/8" fuel line for the large hoses, but you can obtain it at a tractor supply or from the Hampton Rubber Company in Hampton, VA. http://www.hamptonrubber.com/ (They're not a mail order company, but if you call them, they can put together a UPS care package for you.)

There are a couple of tight bends in the 5/8 line that might be difficult to recreate without kinking the line. (The OEM hose is formed.) You can create these bends with a stainless steel slinky thing that my auto parts store gave me. The hose goes inside it, and it forms a supportive cage around the bend. It works fine. Unfortunately I can't remember what it's called, and it's not on any of my receipts. It was a free sample that came with their boxes of 5/8" heater hose (which you shouldn't use, because it's not fuel compliant).

If you really WANT the two larger OEM hoses, in decent condition, with the original braiding on the outside and the formed angles, I have them from off of my '78. I threw them in my box of serviceable OEM stuff to keep/sell/whatever. I personally prefer new rubber to old/authentic rubber, so I replaced those hoses while into the project. Anyway, PM me if you need them.

Edited September 12, 2010 by FastWoman

[jfa.series1]

Another consideration on non-OEM hoses: you are dealing with three different ID's on the fuel tank vent hoses (at least on my car). A check of your vapor tank will confirm your situation. If you do replace the lines,OEM or other, there are two rubber grommets where two lines enter the passenger compartment near the tail lights. These help seal out exhaust fumes, ...etc. They are available at Banzai Motorworks.

I don't think you should consider doing without the vent lines in place.

[beandip]

You can completely do away with the collection tank. Do a search on this topic . I pulled my evap tank 8 years ago and have not had a problem since. One thing to check is the large filler hose. If it is leaking you will get gasoline fumes in the cabin.

Gary

[draztik280]

I did replace my hoses last week because of the raw fuel smell inside the car. Found out that the hose located near the brake light housing was crack open. After that, its gone. I do like the way people removing their evap tank

[FastWoman]

I have to wonder whether raw fuel is ever ejected into the carbon canister if/when the evap tank is removed. For instance, what happens if the car is parked with a very full tank (topped off), and pressure builds in the tank? Does raw gas get burped into the canister? What if the car is parked leaning to the right? What about a hard lefthand curve? Of course if enough fuel is ejected into the canister, it will run out the bottom and onto the ground.

[aceofspades]

i did a pressure test via the vent in eng bay its fine now i found a missing clamp and the top vent tube was cracked, fixed my gas smell is coming from eng bay guessing crabs leak but can't see it any help