Classic Mustangs List Archive

This read-only message was archived from a public mail list.
Mail From: Mark A. Pasch (email redacted)

Everyone,

I had a leaking gas tank (drop-in) on my '66 coupe, so decided to buy a
repro galvanized unit without the drain plug. I purchased a new rubber hose
to the filler neck, gasket material for the tank edge, cork gasket for the
filler neck, and a new screw kit. I didn't buy a new gas tank level sensor
kit, because the original unit has always worked fine. I was gratified upon
inspecting the old unit and plug and everything looked good.

This weekend the rest of the job went well, including up the point when I
dropped in a gallon of gas into the new (installed) tank and the car started
right up without any leaks or gas smell (chronic problem, previously). So I
was quite amazed this morning when I drove to my local service (on the way
to work?) to fill the entire tank: before I had five gallons into the new
tank it began leaking like a sieve. Evidently, the gas tank level sensor
plug is the problem, only becoming obvious when the fuel level reached this
height. When I diassembled the old sensor unit, I don't remember any
gaskets to replace and I simply knocked off the swivel-fit twist off and
reinstalled it as before on the new hole.

So, what gives here? Was there supposed to be gasket that had long ago
disintegrated? The old tank leaked, but only in the tank itself (punctured;
someone did a cheap, patch-tape repair); maybe it also leaked around the
sensor and I just wasn't aware of it. So how do you get these to seal
properly (and how to you verify that it is not leaking, other than to
reexperience this one again)? If there is a gasket missing to replace,
should I just go ahead and replace this (34-year-old) sensor, anyway?
(Recommendations on the best supplier(s) here?)

Thanks for any help,

Mark
--
Mark A. Pasch
Manager, Patents & Marketing
Modular Mining Systems, Inc.
3289 E. Hemisphere Loop
Tucson, AZ USA 85706-5028
phone: (520) 806-3310
FAX: (520) 889-5790
E-mail: (email redacted)



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This read-only message was archived from a public mail list.
Mail From: (email redacted) (email redacted)

I haven't yet changed out this item on my Mustang, however,I had a '68
Dodge Monaco that I had to change out the level sensor because it wore out
on the contact. On that setup, there was indeed a rubber gasket between
the level sensor and the tank housing. It took a couple of tries to get
everything correct without tweaking the rubber gasket when I tightened the
locking ring. Again though, I have no experience with the Mustang setup.
That's all the help I can be.

Jesse
1965 fastback
1965 convertible



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This read-only message was archived from a public mail list.
Mail From: Nathan Allen (email redacted)

It's been a while, but IIRC there is a rubber gasket that fits in a groove
on the sender and seals it to the tank. It has to be positioned exactly
right or the tank will leak.

Nate


At 06:03 PM 1/31/00 -0400, Mark A. Pasch wrote:
>Everyone,
>
>I had a leaking gas tank (drop-in) on my '66 coupe, so decided to buy a
>repro galvanized unit without the drain plug. I purchased a new rubber hose
>to the filler neck, gasket material for the tank edge, cork gasket for the
>filler neck, and a new screw kit. I didn't buy a new gas tank level sensor
>kit, because the original unit has always worked fine. I was gratified upon
>inspecting the old unit and plug and everything looked good.
>
>This weekend the rest of the job went well, including up the point when I
>dropped in a gallon of gas into the new (installed) tank and the car started
>right up without any leaks or gas smell (chronic problem, previously). So I
>was quite amazed this morning when I drove to my local service (on the way
>to work?) to fill the entire tank: before I had five gallons into the new
>tank it began leaking like a sieve. Evidently, the gas tank level sensor
>plug is the problem, only becoming obvious when the fuel level reached this
>height. When I diassembled the old sensor unit, I don't remember any
>gaskets to replace and I simply knocked off the swivel-fit twist off and
>reinstalled it as before on the new hole.
>
>So, what gives here? Was there supposed to be gasket that had long ago
>disintegrated? The old tank leaked, but only in the tank itself (punctured;
>someone did a cheap, patch-tape repair); maybe it also leaked around the
>sensor and I just wasn't aware of it. So how do you get these to seal
>properly (and how to you verify that it is not leaking, other than to
>reexperience this one again)? If there is a gasket missing to replace,
>should I just go ahead and replace this (34-year-old) sensor, anyway?
>(Recommendations on the best supplier(s) here?)
>
>Thanks for any help,
>
>Mark
>--
>Mark A. Pasch
>Manager, Patents & Marketing
>Modular Mining Systems, Inc.
>3289 E. Hemisphere Loop
>Tucson, AZ USA 85706-5028
>phone: (520) 806-3310
>FAX: (520) 889-5790
>E-mail: (email redacted)
>
>
>
>------------------------------------------------------------------------
>All the list info you'll ever want: antler.moose.to/~server/cm


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This read-only message was archived from a public mail list.
Mail From: Dave (email redacted)

Mark,

I did this replacement on my '66 and on my '70 yesterday. There is a rubber
o-ring that goes between the sender and the tank. There is a recess in the tank
for it. Ford includes them with the sending unit, but they can be purchased
separately from any mustang parts vendor.

Dave

"Mark A. Pasch" wrote:

> Everyone,
>
> I had a leaking gas tank (drop-in) on my '66 coupe, so decided to buy a
> repro galvanized unit without the drain plug. I purchased a new rubber hose
> to the filler neck, gasket material for the tank edge, cork gasket for the
> filler neck, and a new screw kit. I didn't buy a new gas tank level sensor
> kit, because the original unit has always worked fine. I was gratified upon
> inspecting the old unit and plug and everything looked good.
>
> This weekend the rest of the job went well, including up the point when I
> dropped in a gallon of gas into the new (installed) tank and the car started
> right up without any leaks or gas smell (chronic problem, previously). So I
> was quite amazed this morning when I drove to my local service (on the way
> to work?) to fill the entire tank: before I had five gallons into the new
> tank it began leaking like a sieve. Evidently, the gas tank level sensor
> plug is the problem, only becoming obvious when the fuel level reached this
> height. When I diassembled the old sensor unit, I don't remember any
> gaskets to replace and I simply knocked off the swivel-fit twist off and
> reinstalled it as before on the new hole.
>
> So, what gives here? Was there supposed to be gasket that had long ago
> disintegrated? The old tank leaked, but only in the tank itself (punctured;
> someone did a cheap, patch-tape repair); maybe it also leaked around the
> sensor and I just wasn't aware of it. So how do you get these to seal
> properly (and how to you verify that it is not leaking, other than to
> reexperience this one again)? If there is a gasket missing to replace,
> should I just go ahead and replace this (34-year-old) sensor, anyway?
> (Recommendations on the best supplier(s) here?)
>
> Thanks for any help,
>
> Mark
> --
> Mark A. Pasch
> Manager, Patents & Marketing
> Modular Mining Systems, Inc.
> 3289 E. Hemisphere Loop
> Tucson, AZ USA 85706-5028
> phone: (520) 806-3310
> FAX: (520) 889-5790
> E-mail: (email redacted)
>
> ------------------------------------------------------------------------
> All the list info you'll ever want: antler.moose.to/~server/cm


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