Gas Tank Filler Necks: Anatomy/Physiology?

[mockingbird812]

Anyone separated the top most piece of the filler neck on a gas tank? This is the piece that the gas cap fits in to. I am thinking this may be soldered in place and might not be to difficult to separate with modest heat applied. http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

Thanks for your input. http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

[Ngtflyr]

Gas fumes, heat source, what could go wrong. Will be looking for a glow to the south of my place.

[mockingbird812]

I'm no maroon. I'll empty most of the liquid out of it. http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif

[m22mike]

South of your place http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif Hell he darn near lives in Mexico.. http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

Hay Sammy
Never messed with the top fitting, and I agree, it is soldered in place. I have unsoldered the pipe filler on a new tank because of alignment issues.
Don't be scared, just do it http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif

[MosportGreen66]

Make sure you don't cause a flash fire Sam. Those are equally as dangerous!

[mockingbird812]

Hola Amigo

So Mikey, did you use a particular solder or flux?

hasta luego dude!

[x Baldwin Motion]

[ QUOTE ]
I'm no maroon. I'll empty most of the liquid out of it. http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif

[/ QUOTE ]

I vaguely remember someone filling the gas tank with water before applying heat and replacing a neck http://www.yenko.net/ubbthreads/images/graemlins/hmmm.gif

[m22mike]

[ QUOTE ]
Hola Amigo

So Mikey, did you use a particular solder or flux?

hasta luego dude!

[/ QUOTE ]

Regular plumbing solder ( DO NOT try and use rosen core solder http://www.yenko.net/ubbthreads/images/graemlins/no.gif)
Seriously, has this tank had gas in it ? Call me sometime.

[mockingbird812]

Just some 110! http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

[YENKO DEUCE REGISTRY]

Why?

[mockingbird812]

Why 110? I had Schonye up the CR to 12.5 for a bit more umph! http://www.yenko.net/ubbthreads/images/graemlins/naughty.gif

[Verne_Frantz]

Sam, I hope you're not comtemplating this manuver on "MY" black on red '69 Chevelle..........!?!? http://www.yenko.net/ubbthreads/images/graemlins/shocked.gif

[mockingbird812]

Verne - I'll chronicle my "manuever" with photos and post, or maybe you'll hear about it on the 11 o'clock news!! http://www.yenko.net/ubbthreads/images/graemlins/shocked.gif

BTW, the tank is off of the car. I will clear out any combustibles very thoroughly prior to the procedure. http://www.yenko.net/ubbthreads/images/graemlins/wink.gif

[x Baldwin Motion]

I've just spent a lot of time researching "how to weld a gas tank" on the internet...

... it turns out this procedure has been mastered in other parts of the world, long ago.....

The most important part of welding the tank is making sure the fumes escape safely without igniting.


Therefore, the angle of the tank and the gashole is most important....




see below.....





http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif








http://onemansblog.com/wp-content/uploads/2007/09/Welding_a_Gas_Tank.jpg






http://www.chinadaily.com.cn/world/2007-07/26/xin_310704260146684789515.jpg

[YENKO DEUCE REGISTRY]

No, why do you want to weld the filler neck?

Also, why would you bump it to 12.5CR? Man!! The 11.0 is quite enough http://www.yenko.net/ubbthreads/images/graemlins/naughty.gif

[mockingbird812]

Marlin - the tank on my Deuce is a Spectrum and the gas cap receiver will not accept a correct gas cap. Schonye is sending me the original top section of my filler neck and I will "graft" the old correct cap receiver on to my new tank.

P.S. I was JK on the 12.5CR. http://www.yenko.net/ubbthreads/images/graemlins/wink.gif

[Mr70]

Is it a Spectra Premium tank?

[wheelhop]

Sam,
I've got a gas tank for a chevelle where the seam between the filler neck and tank is leaking and needs to be welded. It too had gas in it but has been bone dry for a couple years.
If you want to blow yourself up "twice" I'll send it to you.

[YENKO DEUCE REGISTRY]

Sam, that's what I thought. Usually..... the cause for that situation is becuause the cap ring is for an EEC tank which used a different (non-vented) cap. The depth of the cap ring lip is different to prevent the inadvertent use of the wrong cap - and thereby potentially sucking in the tank!

My advice (albeit unsolicited!) is to use a Quanta tank! A little pricey, but.....

[mockingbird812]

Rick - Schonye will have to chime in.

[mockingbird812]

James - let me see how the 1st one goes. Thanks for the offer! http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

[mockingbird812]

[ QUOTE ]
Sam, that's what I thought. Usually..... the cause for that situation is becuause the cap ring is for an EEC tank which used a different (non-vented) cap. The depth of the cap ring lip is different to prevent the inadvertent use of the wrong cap - and thereby potentially sucking in the tank!

My advice (albeit unsolicited!) is to use a Quanta tank! A little pricey, but.....

[/ QUOTE ]

Marlin - the Spectrum tank looks real nice. Mikey promises me even a doofus like me can unsolder the old cap receiver and put the correct one back on. Me being a cheap-skate and all http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif , I gotta try this way 1st before buying a Quanta. BTW - I called Q and they would not sell the cap receiver separately to me. I got the feeling they do not make them there anyway (subcontractor?). http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

[Lynn]

I had a tank with a small hole punched in the bottom once, and soldered a penny on to the hole.
That's the short version.

The long version cost me some eyebrows. Seems the metal actually absorbs a bit of petrol over the years. I completely emptied the tank. Let it sit for a day. Ran a garden hose in it until it overflowed for about 5 min. Emptied the water. Let it set til the afternoon. Set the tank up on a work bench, cleaned the spot really well, went to solder the penny on, and as soon as I hit the hole with an open flame.... BOOM. Of course, I was standing right over the hole for the sending unit.

Fortunately, it only slightly balloned the tank.

[mockingbird812]

Mikey says http://www.yenko.net/ubbthreads/images/graemlins/scholar.gif old shop trick...use dry ice to displace the oxygen during soldering operation. http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

[Schonyenko2]

Sam has requested the neck from the old tamk. I cut it out yesterday and will send ASAP. After that, I am not responsible. http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif

[Mr70]

The Hippie makes sense since Quanta only sells Spectra,(Not Spectrum),Premium gas tanks so buying one from them won't resolve your problem.
Quanta Part# GM 46-D 1970 Nova Gas tank w/o EEC for $189 + ship...includes filler neck.

[ORIGLS6]

[ QUOTE ]
Mikey promises me even a doofus like me can unsolder the old cap receiver and put the correct one back on. Me being a cheap-skate and all , I gotta try this way 1st before buying a Quanta.

[/ QUOTE ]

Be sure to catch it on video. It could be informative, .................................................. . or entertaining! http://www.yenko.net/ubbthreads/images/graemlins/blush.gif http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

[m22mike]

http://www.yenko.net/ubbthreads/images/graemlins/no.gif

[mockingbird812]

Conducted the procedure this weekend. Mikey didn't steer me wrong. Dry-ice worked like a charm and the original gas cap has been mated back with the cap receiver. Thanks for all of your input. http://www.yenko.net/ubbthreads/images/graemlins/beers.gif I feel much better now! http://www.yenko.net/ubbthreads/images/graemlins/laugh.gif

P.S. the notion of an exploding gas tank made me think of the tank as a rocket ship, so I made a launch pad!http://www.yenko.net/ubbthreads/images/graemlins/grin.gif


http://img.photobucket.com/albums/v697/mockingbird812/70%20Roof%20Deuce/Restored%20Components/DSC_0026-1.jpg

You can see the dry ice doing its thing here. By the time i was done the project and ready to mount the tank back on the Nova all of the dry ice had disappeared with no residue.
http://img.photobucket.com/albums/v697/mockingbird812/70%20Roof%20Deuce/Restored%20Components/DSC_0028-1.jpg
http://img.photobucket.com/albums/v697/mockingbird812/70%20Roof%20Deuce/Restored%20Components/DSC_0029-1.jpg
http://img.photobucket.com/albums/v697/mockingbird812/70%20Roof%20Deuce/Restored%20Components/DSC_0034.jpg
http://img.photobucket.com/albums/v697/mockingbird812/70%20Roof%20Deuce/Restored%20Components/DSC_0036.jpg

[ORIGLS6]

Sweet work. Glad it didn't go BOOM! http://www.yenko.net/ubbthreads/images/graemlins/wink.gif http://www.yenko.net/ubbthreads/images/graemlins/flag.gif

[mockingbird812]

...me too! http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

[galveston]

Nice job Sam....and you still have ten fingers and eyebrows!

[mockingbird812]

Actually Shawn, you probably didn't notice today but I used a magic marker to represent my eyebrows!! http://www.yenko.net/ubbthreads/images/graemlins/tongue.gif http://www.yenko.net/ubbthreads/images/graemlins/wink.gif http://www.yenko.net/ubbthreads/images/graemlins/naughty.gif

[Salvatore]

I love correct gas caps! http://www.yenko.net/ubbthreads/images/graemlins/worship.gif

[Postsedan]

[ QUOTE ]
I love correct gas caps! http://www.yenko.net/ubbthreads/images/graemlins/worship.gif

[/ QUOTE ]

Ditto, well done Sam!

Dan

[m22mike]

Nice Sam.. http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif..I am glad that's done http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

[Xplantdad]

Glad it wasn't [ QUOTE ]
Fire all of yer gas tanks and...
explode into space!

[/ QUOTE ]

Looks great Sam!
http://www.yenko.net/ubbthreads/images/graemlins/headbang.gif

[mockingbird812]

http://www.yenko.net/ubbthreads/images/graemlins/haha.gif Born to be child(ish)!! http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

[YENKO DEUCE REGISTRY]

That's a '71 tank.

[mockingbird812]

Say what?

Hey Marlin - looking for yr input in my "Corvette LT1 debut" thread. Thanks.

[STF455]

[ QUOTE ]

I completely emptied the tank. Let it sit for a day. Ran a garden hose in it until it overflowed for about 5 min. Emptied the water. Let it set til the afternoon. Set the tank up on a work bench, cleaned the spot really well, went to solder the penny on, and as soon as I hit the hole with an open flame.... BOOM.

Fortunately, it only slightly balloned the tank.

[/ QUOTE ]

I did that too, attempting to re-solder a leaking filler neck, assuming that all that water would surely flush all the fumes out. WRONG!

My friend Don was observing (from a distance) and kept saying "I wouldn't do that if I was you". One touch with the torch and the filler neck launched past my head; the fireball burnt off my eyebrows and singed most of the hair on my head and arms. Don finally quit laughing long enough to ask if I was OK, then said "that's one way to make sure the fumes are out".

[YENKO DEUCE REGISTRY]

Sorry, was just passing through, should have typed more....

I could see in one of the pics that the neck was curved to the right, and enters the tank on an angle. That style began in '71, which also features the EEC option - hence the need to change the filler neck so the 'vented' cap would fit.

The '70 version is a straight neck that goes directly into the tank, and has the shallower lip for the vented cap = non-EEC.

[x Baldwin Motion]

[ QUOTE ]
Glad it wasn't [ QUOTE ]
Fire all of yer gas tanks and...
explode into space!

[/ QUOTE ]

Looks great Sam!
http://www.yenko.net/ubbthreads/images/graemlins/headbang.gif

[/ QUOTE ]


He's just kidding about that being a 1971 tank, right ? http://www.yenko.net/ubbthreads/images/graemlins/haha.gif http://www.yenko.net/ubbthreads/images/graemlins/haha.gif

woops http://www.yenko.net/ubbthreads/images/graemlins/shocked.gif http://www.yenko.net/ubbthreads/images/graemlins/eek.gif

[Nova Research Project]

The Normal Observable Practice is the 1970 year had three different tanks.

The 1970 straight vented (Commonly called the 68-69 tank) Quanta Part #46A:
http://www.quantaproducts.com/images/GM46A.jpg

The 1970 angled vented. Quanta Part #46D:
http://www.quantaproducts.com/images/GM46C.jpg

The 1970 EEC non vented Quanta Part #46E:
http://www.quantaproducts.com/images/GM46C.jpg

Then in there is the 1971-1972 w/o EEC. Quanta Part#46C:
http://www.quantaproducts.com/images/GM46C.jpg

Note the last three all look the same. Not having the drawings the only difference is in the gas cap fitting.

It pays to make sure you have the right part number tank.

The 1970 straight vented was in my January car so was used past then. Not sure how far. However my July car has angled vented. Hard to track with so many replaced of the years.

Greg

[mockingbird812]

Greg - good stuff. I appreciate your detailed research on all things Nova. Do you have any idea what the angled neck mod accomplished? Was this a design improvement/safety change/etc?

Thanks

[Nova Research Project]

Sam,

You are welcome, happy to help. I do not know why they changed. I would be great to see the engineering change documents. I am not sure they are still available under new GM.

Greg

[JRSully]

My guess on the angled neck, Chevy realized it had a design flaw in the 68 and up Nova tank. Upon nailing it, the fuel flows right up (and sometimes out) of the neck due to it being so "flat" and not angled up. And good luck trying to fill the tank to capacity, tough to do with that neck. I think the angle may cut the straight shot up the tube.? My .02

[YENKO DEUCE REGISTRY]

I think the straight neck '70 version was used for the complete year, and the '70 EEC version was only used in CA.

[x Baldwin Motion]

I need to replace the tank in Mike's 69 Nova, I don't really care about it being correct, I prefer safer. Will the bent neck style 70 tank fit right in there?

(and where is "Quanta" located) Thanks.

or, I could always launch my tank out to Sam for a quick repair!! http://www.yenko.net/ubbthreads/images/graemlins/eek.gif http://www.yenko.net/ubbthreads/images/graemlins/wink.gif
http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif http://www.yenko.net/ubbthreads/images/graemlins/youguysrock.gif

[YENKO DEUCE REGISTRY]

Either style tank will fit perfectly. Just be aware that the if you use an EEC tank with the non-vented cap you should then use the sending unit with the extra outlets for the EEC - essentially the "vents". Otherwise, there is a risk of sucking in the tank.

[Nova Research Project]

#46A, the first one posted above, is the technically correct choice for the 69.

Quanta Website (http://www.quantaproducts.com/home.asp)

Located in MD. Others sell them.

Greg

[67BelAir427]

Spectra is a Canadian company.

http://www.spectrapremium.com/spectra.html

They will not sell directly, but I talked to someone at their customer service desk who owns three big block Novas(name escapes me). I bought mine from Tamraz on E Bay for $149. I got prices for the same tank from Napa and Car Quest here in Canada for $800. and $550 respectively.

[x Baldwin Motion]

I have purchased a "Canadian" tank from Tamraz for my Chevelle. Now I see many Nova catalogs are listing tanks, Ground Up, Classic Ind. OPG etc

Anyone have input on these other options?
Are they all the same tanks?
http://www.yenko.net/ubbthreads/images/graemlins/confused.gif

Thanks

[Mr70]

Canadian made Spectra sells their tanks to many retailers.
I was over @ TAMRAZ last week and they sell both SPECTRA,as well as tanks manufacturered in Taiwan.
It's up to you the consumer to ask which brand of tank it is they are selling you.
Ask to see the box too,as I had one tell me it was a Spectra,but refused to show me the shipping box,which woulda had SPECTRA on it...It turned out it came from Taiwan.