• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
fuel vent separator
#1
I am preparing to put a new fuel tank into my '73 Mustang.

When I took the fuel vapor separator out of the old tank, some black stuff fell out of it. When I touched it, it crumbled. What material is it? Is it necessary?

I ask is because when I was inspecting the unit, it appears that the metal tube that comes out of it, that the rubber hose from the charcoal canister (?) connects to, has no opening at the other end, inside the unit. I stuck a small wire in it to see if would go through where I couldn't see, but nothing.

What is the purpose of having a tube that goes to a dead end in a fuel tank? Or is mine just somehow jammed solid at the inner end with dirt, maybe?
  Reply
#2
(04-04-2018, 03:32 PM)scottyrocks Wrote: I am preparing to put a new fuel tank into my '73 Mustang.

When I took the fuel vapor separator out of the old tank, some black stuff fell out of it.  When I touched it, it crumbled.  What material is it?  Is it necessary?

I ask is because when I was inspecting the unit, it appears that the metal tube that comes out of it, that the rubber hose from the charcoal canister (?) connects to, has no opening at the other end, inside the unit.  I stuck a small wire in it to see if would go through where I couldn't see, but nothing.

What is the purpose of having a tube that goes to a dead end in a fuel tank?  Or is mine just somehow jammed solid at the inner end with dirt, maybe?

It has a small hole get a wire and clean it out
Replace the material that is crumbling with some stainless steel steel wool

Ohio Mustang Supply
440-949-2556

[Image: oms_sig_banner.jpg]
  Reply
#3
Excellent idea Don! Chuck
  Reply
#4
(04-04-2018, 03:32 PM)scottyrocks Wrote: I am preparing to put a new fuel tank into my '73 Mustang.

When I took the fuel vapor separator out of the old tank, some black stuff fell out of it.  When I touched it, it crumbled.  What material is it?  Is it necessary?

I ask is because when I was inspecting the unit, it appears that the metal tube that comes out of it, that the rubber hose from the charcoal canister (?) connects to, has no opening at the other end, inside the unit.  I stuck a small wire in it to see if would go through where I couldn't see, but nothing.

What is the purpose of having a tube that goes to a dead end in a fuel tank?  Or is mine just somehow jammed solid at the inner end with dirt, maybe?

Yea, mine looked black inside too. I just took the ring off and cleaned out the black and brownish stuff. It smelled pretty bad. I think I use a small drill bit and twisted it by hand to clean out the tube. I used a course lawnmower air filter to replace the mesh material inside. I figured it was gas resistant.
[Image: 20160427_183049.jpg]

how to host an image

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle
[Image: DSC_0266xsm.jpg]
[Image: satellite.png] Proud Space Junk Award Winner!












  Reply
#5
scottyrocks, you've discovered something a lot of folks have found when pulling the tank on these 40+ year old cars. The black material is what's left of a open cell foam. That foam material was used to permit fuel vapors to pass through the vapor separator valve  to the charcoal canister but to keep liquid fuel from entering the orifice and possibly stopping the line up and not allowing the fuel system to vent properly. I believe some of our forum members have used something similar to steel wool which would provide the same function as the original foam.
The orifice is small so you may need to try a smaller diameter wire or try some compressed air.


Attached Files
.jpg   IMG_0889.JPG (Size: 80.81 KB / Downloads: 137)

Steve

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!
  Reply
#6
Fantastic! Thanks for the quick, on-target responses! I'm gonna get on this right away. Smile
  Reply
#7
I'd replace the guts with stainless steel cut from a choreboy pad. It is more of a flattened ribbon and if it should ever deteriorate, it would not make it through any filter.

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
  Reply
#8
I replaced the filtration medium with a small bit of stainless steel wool. The new tank is undercoated and the separator and sender units are back in place.

The only thing I have left to do before installation is to blow out the line that connects to the separator.

I have been under the car and in the engine compartment countless times already but I cannot determine where this line enters the engine compartment, as it passes into the chassis from under the car. There's a lot of stuff coming through the firewall. Any help? A picture with an arrow pointing to what it connects to in the engine compartment would be best. Smile Thanks.

Edit: I looked in the engine compartment again, and took a guess as to the most likely line.

The entire line, from the back to the front where it disappears into the chassis, is steel. I located a steel line of the same OD coming out of the firewall on the driver's side, and then cross to the passenger side, rising slightly.

This line, on my car, is capped off with a piece of 3/8" rubber line, with a bolt in the other end.

I placed the air hose on the end of the line by the tank, and blew the bolt out of other end in the engine compartment.

So now my questions are, why have a vent when the other end is closed? Should it be connected to something? Or is the volume of the entire line enough to do the job the vent was designed for? Thanks.
  Reply
#9
I know yours is a 73, but maybe this pic of my 71 vent tube and charcoal canister might give you an idea. I believe the 73 canister is mounted higher and a different shape/size. The attached pic is from before I redid the engine bay, but I think you can see what I mean.
Also, did you happen to see my previous post on replacing my fuel tank, lines, pump, sending unit etc. etc.? Not to worry you, but this is what an old steel fuel line can look like. I replaced with SS.


Attached Files Thumbnail(s)
       
  Reply
#10
Here is 73 charcoal canister and lines. I a have spare if you need one.


[Image: 20170308_081957.jpg]



[Image: 20160822_100001.jpg]

1973 H Code Convertible - Medium Copper Metallic - June 8, 1973, Built Ford Marketing Sales Vehicle
[Image: DSC_0266xsm.jpg]
[Image: satellite.png] Proud Space Junk Award Winner!












  Reply
Share Thread:  


Possibly Related Threads...
Thread Author Replies Views Last Post
  Fuel filter change. Anderslober 2 312 05-03-2018, 07:01 AM
Last Post: Anderslober
  FiTECH and mallory and fuel choices NG8264723 6 683 11-29-2017, 01:20 AM
Last Post: vozaday
  Looking for fuel vapor separator??? cruiseman73@yahoo.com 4 1,002 06-21-2017, 11:27 PM
Last Post: cruiseman73@yahoo.com
  Fuel type for 429 cj / scj 351 c / w? Anderslober 11 1,613 09-30-2016, 07:52 AM
Last Post: Bill73Ragtop
  Fuel injection mach1mama 27 2,170 07-10-2016, 05:51 AM
Last Post: L.C.Gray
  Fuel Pump Adventures VegasFastback 8 1,629 03-03-2016, 12:44 PM
Last Post: Pastel Blue
  Fuel gauge sender L.C.Gray 15 2,084 09-23-2015, 10:38 PM
Last Post: Jeff73Mach1
  fuel pump savagess 2 700 09-02-2015, 09:23 PM
Last Post: Jeff73Mach1



Users browsing this thread: 1 Guest(s)