Im guessing as to what the part I need or what its called.

I have 2 hoses that come out of the back top of the gas tank behind the back bumper, I have been told that this part is plastic and connects to the 2 hoses and is a vent release for the gas tank so gas will not shoot back out of the tank.
Some of the 70's Cutlass has this on their cars and iis located in the back trunk seat area.

I would like to buy the part if anyone has it. I have not found it on any of the Oldsmobile parts site( Year One OPG Fusick ETC).

ANYONE?

 

What you are thinking of was definitely used on the 1970 Cutlass/442's. It's a white plastic contraption with two hookups on the bottom for the vent hoses and one tube coming out the top to act as a vent. The factory stuffed some fuel resistant foam down inside this plastic vent.

I don't know if the '67's actually used this plastic part. They may have just had the hoses pointing upwards and nothing else.

Someone here should have a '67 Assembly Manual or a Service Manual that will show the detail.

I know exactly what hoses you are talking about because I had my hands on them on a '67 442 I worked on months ago. Just can't remember if the plastic vent was on the end of the hoses.

The Parts Place, Inc. makes and sells this part. Others have it also but Parts Place will probably have the cheapest shipping. They are in the Chicago area. Their catalog only shows the vent as being applicable to the 68-72 model years. The more I think about it the more I'm convinced that the '67 just had two hoses with nothing on the ends.

 

I've seen the plastic piece on 1969 and 1970's, but not the 1967. Not that I'm an expert on '67's but attached is a photo of the fuel tank breather on my low mile 1967 4 door. It looks something like foam rubber stuffed in each hose... and obviously needs replaced! I had bought the car from a little old lady with a mile or two of dirt road to her house John

P1010134-2.jpg

 

Thanks for you feedback, I think you might be right on the money, It could very well be just 2 hoses and nothing else. I will check parts place. I talked a a man at a car show Saturday who was showing his 67 442. I asked him about it and he said he wished he had that on his tank, he said everytime he fills up he has to keep his ear at the gas tank neck to listen to the sound of the gas filling up, if he doesnt it shoots back out at him at 90 MPH! Something to do with the uneven payment at the pump when the car is parked. thanks

 

This is from my Product Manual, there should be a small plastic reducer in both hoses to limit fuel spillage.
I just bought what is supposed a bulletin fix and I will post a pic of it when I get it.
Using the newer reproduction plastic tank fuel vent surge from my understanding has never worked well in 66 and 67s. I snake about 3 feet of hose across the fuel filler and back this creates an air break and the fuel does not spill out even with the tanks full.

 

Thanks Hairy!
Im soaking a pair of my wifes Nylons in a can of gas for the next 3 days, if they dont melt or go to hal, I am going to stuff a little bit of the Nylons down the rubber hoses to stop the vapor smell of the gas. Should work as long as the Nylons hold up, Im going a little extreme on the soaking in gas, but want to see how they hold up. Should vent the air ok as well, thanks all .......
-harv

 

HairyOlds, I've seen those restrictors on 1966-67 Toronado's but not the Cutlass/442's. Seems like it would be way better than a large open hose! John

 

And your correct you mainly do see the restrictors on the Toronado vent hoses. I had them on the original hoses on my 442 which is a late 66 build car. Even with the restrictors I had gas pouring out of the hoses before I modified them with the tank full.

Paul

 

This is the correct bulletin fix for the 67 a bodys. I doubt that there are any around but it looks like it would work.

 

Paul, how did you modify the two hoses? to prevent leakage?

Thanks, Gary

 

I wish this thread had some more definitive advice. I have a one serious problem.. '67 CS Conv. Gaas poured out while travelling on the Fl turnpike @ 70 mph !!!! Tank had a lot of pressure, and when released, the spouting stopped. I lost about 4 gallons of gas in 50 miles!!!! Continued to happen so to solve the problem, I released ( but not removed) the non-vented cap so there was no pressure . Held it in place with a rag behind the license plate. Gas did slosh out of the filler tube, but only enough to soak the rag.
Question... Why is gas POURING out of vent tube under pressure? Why is it not venting?
b) I'm going to try a vented cap (deep cap '70-74)( if it fits) to remove the pressure in the tank tomorrow. Will update from there.Am also conidering putting hole in cap to that it will vent. ( May also leak with fulltank sloshing!. Don't know until I try it.
Thanks for any input.
Hotrodder ( aat the Oldsmar reunion.)
Any solutions to the venting problem I.m experiencing?

 

I'm not sure about your problem. My 67 GS400 has the same set up. I DO know Inline sells the 2 vent hoses with built in restricters now. I also know sometimes people replace the hoses and modern hose can kink where it bends. My guess is your vent hoses are clogged or kinked.

 

When I started the frame off on my 67 442, there were just 2 hoses with a foam material stuffed down in both hoses. That is all. Inline Tube has a replacement set that matched my original hoses.

 

I had the same problem on my 67 convertible. I went through all the BS asking questions ordering parts etc. etc. Like this thread I didn't get a definitive answer/solution. So I used my noodle and decided that a gas tank vent is to move air, into the tank as the car uses fuel and out of the tank as the car sits and the fuel expands or contracts as it is affected by temperature. So I took my new hoses, which still leaked, which I bought from Inline Tube back off the car. The big one had a loose fitting piece of foam in it the other had nothing. So I took a new lawn mower air filter which was made from green open cell foam and cut a piece for each tube. They fit tight enough to stay put and allowed air to move somewhat slowly. Then I reinstalled the hoses making sure they ran continuously upward, using a zip tie to help secure them in the factory keeper thing. My problem was solved. No more gas leaks, no more problems of any kind.


Good luck,
Mike

 

A simple solution is to install an inline clear fuel filter in each hose. Put the inlet side toward the tank and you can attach a piece of hose to the outlet side and secure to floor. The fuel can expand into the body of the filter without sloshing out and drain back as it contracts. It also filters the incoming air to keep dirt out. These are readily available in various sizes to fit each hose.

http://s7d9.scene7.com/is/image/GenuinePartsCompany/NWM?$Product=GenuinePartsCompany/507236

 

Gentlemen, Thanks for the responses. All of the above solution are for limited amounts of fuel , as vapor or even drops , to be collected and returned back down the drain lines.
My problem is that I had 4 gallons of fuel spitting out the vent tube when the tank was under pressure.. WTF ! ???

Have my vent line within the tank moved so that they are now under-fuel, thereby sucking up fuel as the pressure increases within the tank?

I'm going to install the vented cap ( if it fits) to release any pressure buildup.

I just hope that fuel doesn't slosh out the cap when I accelerate. Then I can address fuel vapor line routing and condensing issues.

Any more theories ?

 

Gentlemen,
Replaced the non-vented cap with a vented filler cap. Tank did not develop pressure, and no gas was vented from either vent pipe during 200 mile trip today. Gas did not seem to slosh out filler tube either. Will attempt to remove, clean and put back original rubber vent tubes. I'll also attempt to check vent tube to see if clogged. I'm goung to contact agas tank manufacturers to find out how vent is constructed. Right now, system is venting through cap.
Thanks for input.
Hotrodder

 

Update:
With a 1/2 full gas tank, when I blow through large tube, there is a lot of resistance. When I blow through narrow pipe, it is "under" gas within tank, and makes a bubbling sound.
More investigating to follow.

 

Has anybody ever cut open a Cutlass S NOt 442 fuel tank and notice if the vent is just an opening in the top of tank, or are there tubes inside tank that go to some other places within the tank?
Just trying to get the full picture of the venting system of C.S.fuel tank.
Why are there two size vent tubes on C.S.?
Hotrodder

 

Ventilation of 66-7 A body fuel tank
was satisfactorily achieved by employing th porous brass pneumatic vents common on idustrial machines
Made lines pliable with a dip in boiling water
Allowwing th slightly larger O D of vent to have an interference fit that forever secures them in place as they keep crap outa my engine...cause walkin realy sucks when ya own a 442 or 2