Jump to content
Arne

Rating the factory 240Z fuel vent hoses

Recommended Posts

Who else replaced that nylon coupling that goes into the side of the filler neck? It seems to break in tension due to the spiral nature of the failure. I just use a piece of copper pipe, never had a problem since.

Share this post


Link to post
Share on other sites
Another good tank ventilation reference. This one has parts to order if you don't order Nissan parts and want to sleeve the lines for the bends instead of Dave/Dogma420's copper 180 degree elbow method...

http://www.jrdemers.com/280ZX/tankvents/tankvents.html

I just did my tank, using a combination of advice. I bought no factory hoses, and took a different approach to the 180 degree bend necessary for the large hose on the right rear of the tank. I used two 3/4 inch 90 degree brass fittings. See picture. post-17507-14150814618786_thumb.jpg

Also note that the part numbers from the above link are out of stock. Here's what I ordered from http://www.mcmaster.com/

1ft 7270K3 Moisture-Seal Polyolefin Heat-Shrink Tubing 1.1" ID Before, .37" ID After, 9" L, Black $4.29 - Great for making those grommets for the floor holes.

4 Ft 5645K19 Low-Pressure SAE Hydraulic Hose SAE30R2, 5/8" ID, 7/8" OD, 350 PSI, $12.00

7 Ft 5645K18 Low-Pressure SAE Hydraulic Hose SAE30R2, 1/2" ID, 3/4" OD, 400 PSI, Black $10.88 - get the extra foot

2 Ft. 5201K67 Lightweight SAE Hydraulic Hose 3/4" ID, 1.06" OD, 1250 PSI, Black $16.66 - get the extra foot, it'll make it easier to bend this tough hose.

6 Ft. 54605K34 Low Pressure SAE Fuel Hose 3/8" ID, 5/8" OD, 50 PSI, Black $6.90

The other hoses I got from Napa. Napa did end up having the 1/2" hose, too.

After having it boiled, my tank looked pretty good inside. I ended dong the POR-15 treatment anyway. I figured I had it out. Worked good, but took a lot of time and effort, as getting the different chemicals and the coating to drain out of that tank is not easy. I also took the time to wire brush the insides of the rear quarters and the underside of the hatch floor and spare tire well, then treated them with some rust remover/encapsulation and painted them with Eastwood's Chasis Black. They were amazingly clean, but there were a few spots of rust and I figured I should get it while I was there.

Anyway, no more stink, and the tank and underside of the back end are now cleaned up and protected. Was all very simple, just a lot of physical work.

Does anyone care to speculate on why Nissan has that vent pipe on the top right rear of the tank facing left, making it necessary to do that 180 degree bend? There doesn't seem to be a reason it couldn't have been put on facing right.

Share this post


Link to post
Share on other sites

With respect to the advise above to use hydraulic hose, the stuff is too big to fit through the passages in the body and the 1/2" does not fit over the fittings.

DON'T BOTHER WITH HYDRAULIC HOSES

attachment.php?attachmentid=46907&d=1311551660

post-7641-14150815700952_thumb.jpg

post-7641-14150815701351_thumb.jpg

Edited by Blue

Share this post


Link to post
Share on other sites

71 240z fuel tank with fitting sizes (not hose sizes)

attachment.php?attachmentid=47043&d=1312054967

71 240z evap tank with fitting sizes (not hose sizes)

attachment.php?attachmentid=47042&d=1312054965

Rear left connection. I used 1/2" fuel hose and it worked very well. I obtained the hose from a truck supply shop. Finding fuel hose over 3/8" is difficult and as mentioned in a post above, only very low pressure (~400psi) hydraulic hose MAY work.

attachment.php?attachmentid=47037&d=1312054947

Here is a view looking up at the vent line at the rear right top of the tank. As you can see the vent line points away from where the hose comes through the floor. This calls for a 180degree turn in very close quarters as the top of the tank is pressed up against the rear hatch's floor.

attachment.php?attachmentid=47041&d=1312054960

There are many ways to make the 180degree turn. Here is mine: I used fuel resistant hose from the manifold vent hoses from a 280z EFI system. This one had a 90 degree bend and it fit on the 17mm / 5/8" fitting so I did not need 5/8" hose (which was a good thing as I could not source it).

attachment.php?attachmentid=47040&d=1312054956

I used a PEX 90degree water hose brass fitting that I sourced from a hardware store to connect the EFI hose to a 1/2" fuel hose. Yes 1/2"! You can make it fit over the fittings on the gas tank and on the evap tank (heat from hairdryer or microwaves water helps as well as lithium grease). The EFI hose and the PEX gave me 180 degrees.

attachment.php?attachmentid=47039&d=1312054952

For the tank straps, I used rubber that I sourced from a hardware store and automotive goop to secure it to the strap. This stuff was ~ 1/8" thick.

attachment.php?attachmentid=47038&d=1312054949

The only other tip was to heat the filler pipe's bottom with a hair dryer to make tank installation easier. Soft rubber is important.

I did not get a shot of the 3/4" hose that connects the evap tank to the filler pipe as my camera ran out of memory. I'll post it tomorrow. Again I used hose from an EFI manifold and it worked nicely.

post-7641-14150815752916_thumb.jpg

post-7641-1415081575337_thumb.jpg

post-7641-14150815753707_thumb.jpg

post-7641-14150815754125_thumb.jpg

post-7641-14150815754498_thumb.jpg

post-7641-14150815754905_thumb.jpg

post-7641-14150815755416_thumb.jpg

Edited by Blue

Share this post


Link to post
Share on other sites
With respect to the advise above to use hydraulic hose, the stuff is too big to fit through the passages in the body and the 1/2" does not fit over the fittings.

Well, I used the hoses, and they fit. I did have to use some motor oil on some of the fittings to get the hoses to slip on. I didn't have any trouble penetrating the passages, though. Some of those hoses diameters are available locally via NAPA or boat repair or lawn mower repair shops if you don't want to order them. However, it just seemed easier to order them all from one place and be done with it. Be careful you don't get coolant hoses. Even if they tell you the hoses are good for fuel, they might not be. I bought a complete set of hoses from Autozone at first. They told me the hoses were fuel rated. I looked up the part numbers online after I got home, and learned they were not fuel rated, so I took them back and ordered a set.

Share this post


Link to post
Share on other sites
Be careful you don't get coolant hoses. Even if they tell you the hoses are good for fuel, they might not be. I bought a complete set of hoses from Autozone at first. They told me the hoses were fuel rated. I looked up the part numbers online after I got home, and learned they were not fuel rated, so I took them back and ordered a set.

Same thing happened to me at Kragen/OReilly. Needless to say, I returned them and found large diameter fuel hose at a local race shop (Gotelli's in SSF, great shop BTW).

Share this post


Link to post
Share on other sites

I was looking in the fuel hose section of Pep Boys last evening and noted some larger diameter PCV hose that is fuel rated. It looked like it may work in place of the 3/4" between the filler neck and the evap. tank.

For hydraulic hoses. It is a good idea but I could only source high pressure hoses that had one or two internal wraps of wire that made the hoses bigger than the low pressure ones recommended above.

Share this post


Link to post
Share on other sites

So, as of this date May 8, 2012...

Are the Nissan parts original, i.e. new old stock?

That would mean putting on 40 year old parts wouldn't it?

I'm thinking the price keeps going up because there are no more available/ being made and thus, supply and demand.

Share this post


Link to post
Share on other sites

The hoses I got from Nissan in 2007 were definitely fresh, not 30+ years old. I do not know if any are still available today.

Share this post


Link to post
Share on other sites

I know I'm eventually going to have to go there. Thanks for the reference. Guys like you who document what you've done seen and found are what make the Internet and forums like this so incredibly valuable. THANK YOU!

Share this post


Link to post
Share on other sites

I saw a photo from RatsunZ.

Does anyone try this unicoil hose bender for using this for 17235-E4601, Large diameter hose with several preformed bends, including a 180 degree bend?

post-25433-14150821580754_thumb.jpg

Do you think it's safe to use it for vent hose?

Share this post


Link to post
Share on other sites

I tried ordering 17236-E4601 through nissan parts cc and they are out of stock. Is there another place where I might be able to find it?

Share this post


Link to post
Share on other sites

2014 update: These hoses are all getting very scarce. In the order that Arne originally listed the four hoses:

MSA currently stocks 17239-E4601 for $37.08 (their part number is 11-3263). This hose can also be sourced from Banzai, I believe, and Courtesy currently shows one available that I'm in the process of trying to purchase.

I have been unsuccessful in finding 17235-E4601 (which is the important one) or 17238-E4602.

17236-E4601 shows up in one or two places for $90-$100 but in actuality I believe it's NLA. However, I did find 14mm ID hose which can be purchased by the meter from www.AutohausAZ.com, p/n N203711. It's currently selling for $8.83/meter and it's even cloth braided like our original hose. So I think that's taken care of. I think 14mm is the correct ID for this hose and it would fit better than 1/2" ID hose which is closer to 12mm.

I'm pretty well stymied on finding 17235-E4601 or 17238-E4602, though. Anyone had any luck recently?

Edited by bacarl

Share this post


Link to post
Share on other sites

For 17238-E4602 I think I'm going to use 2 feet of McMaster Carr p/n 5282K69 (3/4" ID petroleum hose - Use with diesel fuel, fuel oil, gasoline with up to 15% ethanol, and hydraulic oil).

I haven't seen any mention of the small diameter hose coming off the top of the vent tank, except for in Blues photos. Does that one typically need replacing too? Where does it go to?

Share this post


Link to post
Share on other sites

17239-E4601

Courtesy showed 50+ units available in the system yesterday afternoon.

Share this post


Link to post
Share on other sites

Would it be easier to push the hoses through their grommets then hook them to the fuel tank 1st. Snug the fuel tank up, then attach the hoses to the vent tank? I'm trying to work out a plan in my head and that's the best way I can figure out???

Thanks for any past experiences.

Share this post


Link to post
Share on other sites

Would it be easier to push the hoses through their grommets then hook them to the fuel tank 1st. Snug the fuel tank up, then attach the hoses to the vent tank? I'm trying to work out a plan in my head and that's the best way I can figure out???

Thanks for any past experiences.

Cliff - that is exactly the process I used for my install.  Also - lube the filler neck a bit to make it easier to slide into the plastic tube as you raise the tank.

 

Jim

 

Phooey - just realized I am responding to an old post.

Edited by jfa.series1

Share this post


Link to post
Share on other sites

Cliff - that is exactly the process I used for my install.  Also - lube the filler neck a bit to make it easier to slide into the plastic tube as you raise the tank.

 

Jim

 

Phooey - just realized I am responding to an old post.

 

I offer the four hose grommet boots

 

http://www.240zrubberparts.com/apps/webstore/products/show/4626636

 

Steve

Share this post


Link to post
Share on other sites
On December 7, 2015 at 9:28 AM, nix240z said:

I offer the four hose grommet boots

Steve

 

Any chance you'll be stocking these again Steve?

Edited by cnwayland

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Who's Online   7 Members, 0 Anonymous, 166 Guests (See full list)

  • Search Engine Meta Tags:
    classic, z, datsun, 240z, 260z, 280z, zcar, zed, s30, classiczcars.com, 240z.org, fairlady, 240, 260, 280, nissan, 240 z, 260 z, 280 z, zx, turbo, classic z, 280z cars, cars 240z, car forums, datsun, nissan, cars datsun, car club, 280zx, car, nissan zcar, classic z car
×