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Thread: 1964 Wagonaire and Sedan Gas Caps Why Are They Different?

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    Speedster Member bjackameit's Avatar
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    1964 Wagonaire and Sedan Gas Caps Why Are They Different?

    O.K. -- I try to learn something new every day --

    Just finished filling the gas tanks and adding Stabil for the winter to my two '64 Studes.

    Both the Challenger Wagonaire and the Daytona Sedan have the locking stainless steel type gas caps.

    The Wagonaire has a Studebaker AC 3415 cap -- I have the box the cap came in.

    The Daytona Sedan has an AC Delco GT49L cap which lists as being correct for a 1964 Studebaker Lark type sedan. I also have the box it came in. I suspect it is the same as Studebaker AC 3195 which is the Studebaker Accessory Number for the sedan locking cap..

    Externally these caps look exactly the same and the keys are the exact same type -- I suspect AC Delco supplied the Studebaker accessory caps.

    The only obvious visual difference between the two caps is that the "wings" on the inside that hold the cap to the filler pipe are wider on the Wagonaire cap.

    Both caps fit fine and seat properly --

    I note from my parts book that the standard non-locking Wagonaire and Sedan gas caps also have different part numbers.

    So the question is -- why do 1964 Wagonaires and 1964 Sedans use different gas caps? There must be a reason but I don't know what it is --
    Bill Jackameit
    1964 Challenger Wagonaire
    1964 Daytona Sedan
    Total of 10 Studebakers owned since 1961
    Bill Jackameit's Studebaker Page online since October 1995
    http://billstudepage.homestead.com/files/studpg.htm


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    President Member Bullet's Avatar
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    I know the Lark type is vented via a tube off the filler neck. I don”t remember if the wagonaire is vented the same way or through the cap. I have two locking gas caps for my 64 cruiser. I have only used the vented one, the second locking cap has stamped inside it, non-venting.

    I too am curious.

    Mark

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    The 64 sedan would have a non vented cap and is vented via a tube from the filler pipe, it is non vented because of its location, when you accelerate gas would spill out the vent. The Wagoneer has the fuel cap on the side at right angles to the fuel and will not spill out therefore it can be vented.DSC09788.JPGDSC09789.JPGThis is a fill neck from a sedan it is very short you can see the vent tube from the side, the tube is the vent tube.

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    Golden Hawk Member StudeRich's Avatar
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    It IS important to use the correct Cap, as a Vented Cap on a Sedan will dump fuel, and a non-vented Cap on a Wagon will suck the Tank in and shut the Car down.

    All C & K Models and '47 to '61 Sedans also MUST use a Vented Cap.
    StudeRich
    Second Generation Stude Driver,
    Proud '54 Starliner Owner




  5. #5
    Speedster Member bjackameit's Avatar
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    Quote Originally Posted by altair View Post
    The 64 sedan would have a non vented cap and is vented via a tube from the filler pipe, it is non vented because of its location, when you accelerate gas would spill out the vent. The Wagoneer has the fuel cap on the side at right angles to the fuel and will not spill out therefore it can be vented.DSC09788.JPGDSC09789.JPGThis is a fill neck from a sedan it is very short you can see the vent tube from the side, the tube is the vent tube.
    Thanks that makes sense.
    Bill Jackameit
    1964 Challenger Wagonaire
    1964 Daytona Sedan
    Total of 10 Studebakers owned since 1961
    Bill Jackameit's Studebaker Page online since October 1995
    http://billstudepage.homestead.com/files/studpg.htm


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    Speedster Member bjackameit's Avatar
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    Quote Originally Posted by StudeRich View Post
    It IS important to use the correct Cap, as a Vented Cap on a Sedan will dump fuel, and a non-vented Cap on a Wagon will suck the Tank in and shut the Car down.

    All C & K Models and '47 to '61 Sedans also MUST use a Vented Cap.
    The risk of harming the vehicle seems greater with a non-vented cap on a Wagonaire than with a vented cap on a Sedan -- but I would not want to be dumping fuel from a sedan either. With a Sedan would dumping fuel only be a problem if the tank was full or near full? It seems like the aftermarket caps commonly available for these cars are all vented.
    Bill Jackameit
    1964 Challenger Wagonaire
    1964 Daytona Sedan
    Total of 10 Studebakers owned since 1961
    Bill Jackameit's Studebaker Page online since October 1995
    http://billstudepage.homestead.com/files/studpg.htm


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    Had an interesting situation once with my Wagoneer back in the non-ethanol days.
    Mebbe something for you wagon owners to watch for.
    Sat out in heavy rain, then ran BAD.
    Turned out vertical gas cap had let water leak into tank.
    New cap and a couple of cans of Heet, and problem solved.

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    President Member ndynis's Avatar
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    Skyway: There was a special part put out later to take care of that problem. I have a copy of the document about it and a couple of the pieces used to do that but I don't have access to them right now. If no one else posts it I will add it later when I can.
    Nick

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    Golden Hawk Member StudeRich's Avatar
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    Probably a Spacer to make the Gasket fit tighter.

    My '76 Volare~ Premiere Wagon had a spacer that belonged behind the Gas Cap BUT, with the Premier Wood Trim, the locking Cap which was part of the "Protection Group" I special ordered on the car, would not even go on enough to Lock.
    When I found that hanging LOOSE when it was Delivered New, they removed the spacer. Just one of MANY Quality issues we had with that Wagon before we dumped it.
    Last edited by StudeRich; 11-03-2018 at 06:57 PM.

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    I added a vent pipe to my Hawk when I replaced the tank, very simple and now I don't care if the cap is vented or not!-Jim

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    Quote Originally Posted by ndynis View Post
    Skyway: There was a special part put out later to take care of that problem. I have a copy of the document about it and a couple of the pieces used to do that but I don't have access to them right now. If no one else posts it I will add it later when I can.
    Nick
    See Service Letter F-1964-2, FUEL TANK FILLER NECK WATER DEFLECTOR, 1963-64 STATION WAGON MODELS, dated October 14, 1963
    Instructions to install a #1562555 Filler Neck Deflector.
    This deflector entered production on 1964 Station Wagons with Serials 64S-4460 and 64V-4685.

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    Speedster Member bjackameit's Avatar
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    Quote Originally Posted by Studebakercenteroforegon View Post
    See Service Letter F-1964-2, FUEL TANK FILLER NECK WATER DEFLECTOR, 1963-64 STATION WAGON MODELS, dated October 14, 1963
    Instructions to install a #1562555 Filler Neck Deflector.
    This deflector entered production on 1964 Station Wagons with Serials 64S-4460 and 64V-4685.
    Well -- My '64 Wagonare is 64S-3122 so I guess I do not have the deflector --

    I quick vendor check did't find that part but --

    Believe it or not -- checked eBay this morning and there it was for $11 plus $5.50 shipping -- so I bought it -- looks like a giant metal washer with the end cut off --

    Now I need to get a copy of the service letter --
    Attached Images Attached Images
    Bill Jackameit
    1964 Challenger Wagonaire
    1964 Daytona Sedan
    Total of 10 Studebakers owned since 1961
    Bill Jackameit's Studebaker Page online since October 1995
    http://billstudepage.homestead.com/files/studpg.htm


  13. #13
    President Member ndynis's Avatar
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    Bill, here is the Service Letter (sorry, the pdf file was too large to send so had to convert it)
    Fuel Tank Water Deflector.jpg:

  14. #14
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    Live and learn. Even tho my wagon is long gone, thanks guys!

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    Speedster Member bjackameit's Avatar
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    Quote Originally Posted by ndynis View Post
    Bill, here is the Service Letter (sorry, the pdf file was too large to send so had to convert it)
    Fuel Tank Water Deflector.jpg:
    Thanks -- got it -- printed out fine --
    Bill Jackameit
    1964 Challenger Wagonaire
    1964 Daytona Sedan
    Total of 10 Studebakers owned since 1961
    Bill Jackameit's Studebaker Page online since October 1995
    http://billstudepage.homestead.com/files/studpg.htm


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    The wagons also had a slight curve to the cap instead of straight like the sedans.
    Rob in PA.

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    Golden Hawk Member StudeRich's Avatar
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    Quote Originally Posted by stude1964 View Post
    The wagons also had a slight curve to the cap instead of straight like the sedans.
    Rob in PA.
    Are you SURE that is not just on '59 to '62 Wagons? The '63 to '66 Wagons do get a different Cap than '59-'62.

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    StudeRich
    I'd have to dig out my original gas cap as I now run a locking type cap on it. As I recall the original locking cap I wanted to use from my '64 HT wouldn't work because it didn't seal due to the curve. I know the earlier wagons used the cap with the curve and my '64 wagon also has a curve that is similar to the earlier sheet metal. I also just acquired a locking cap that was NORS by Slant and it indicated use for sedan-type cars, not wagon.
    Rob in PA.

  19. #19
    Golden Hawk Member StudeRich's Avatar
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    IF that curved Wagon Cap HAD fit your Sedan, you would not want it sometimes leaking Gas from it's Vent.

  20. #20
    President Member garyash's Avatar
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    If the unvented cap seals tightly on a Wagonaire, the gas tank can collapse under vacuum and be permanently distorted. It happened to me after I had owned the car for 5 years or so. I re-inflated the tank using water from my garden hose after making an adapter for the filler neck. I don't like putting air pressure into tanks not designed for pressure.
    wagonaire_tank.jpggas_tank_inflate.jpg
    Gary Ash
    Dartmouth, Mass.

    '32 Indy car replica (in progress)
    '48 M5
    '65 Wagonaire Commander
    '63 Wagonaire Standard
    web site at http://www.studegarage.com

  21. #21
    President Member ndynis's Avatar
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    Gary:
    Thanks for posting a good reminder about re-inflating the tank using air pressure and a great example of what happens with the wrong cap!
    Nick

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