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Username Post: '60 Impala fuel sending unit ?        (Topic#349286)
PLS 
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PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
01-22-18 08:41 PM - Post#2721812    

This is the sending unit that I removed 40+ years ago from my ’60 Impala and I think that it probably looks as good as it did when it was installed. I want to check it out before reinstalling it to make sure that it is good so, what is the procedure in testing it? Thanks in advance, Lamar

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raycow 
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raycow
Loc: San Francisco, CA
Reg: 11-26-02
01-23-18 01:03 AM - Post#2721832    
    In response to PLS

First, check to see that the arm moves freely and then shake the float to make sure there is no liquid or anything else inside it.

For an electrical check, connect an ohmmeter across the wire terminal and the mounting plate. You want to see something close to 30 ohms with the arm all the way up and 0 ohms with it all the way down.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
DonSSDD 
Silver Supporting Member
Posts: 7297
DonSSDD
Loc: Nova Scotia, Canada
Reg: 08-21-01
01-23-18 05:01 AM - Post#2721840    
    In response to raycow

Boil a pot of water, dip the brass float in it. If it has a hole, you'll see air bubbles coming out of it immediately.

63 Pontiac Parisienne Sport Coupe(CDN Chev mechanically (409, 4 speed),62 Bel Air SC (sold), 59 El Camino (sold), 62 Bel Air SC(sold), 63 SWC Vette (sold),
Member #2194


 
Aussie_Chevy_Nut 
"6th Year" Silver Supporting Member
Posts: 575
Aussie_Chevy_Nut
Loc: Australia
Reg: 11-26-02
01-23-18 05:21 AM - Post#2721842    
    In response to PLS

Hi Lamar,
I would check your old sender’s float carefully for leaks as here in Australia the Gas seems to attack the floats. I am in the process of removing the sender after only a couple of years.

At least here you can avoid ethanol fuel as it is labelled as such.
John



 
junky 
Valued Contributor
Posts: 3385

Loc: Northeast CT
Reg: 06-27-10
01-23-18 09:08 AM - Post#2721864    
    In response to PLS

Don't forget to add a new pick up sock to the end of the pick up tube.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.


 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
01-23-18 08:46 PM - Post#2721923    
    In response to PLS

Thanks guys for the input. Ray the arm moves really good and like I said this thing, although the pics really don't show it that well, is in really good condition at least physically. Nothing inside the float. After checking the ohms several times it basically ended up 1.0 and 32. I'm really not sure how accurate my meter is. What do you think of the readings? Don did the water test and nothing. John the float looks really good and I guess that is because it has never been subjected to the ethanol fuel of today. I'm not sure but it may have spent it's days in only leaded fuel, depending on when leaded fuel was stopped. There is a supplier close to me that provides none ethanol fuel and that is what I plan on using once I get it to the driving stage. Junky thank you for pointing out the need for the pick up sock, I hadn't thought about that. Thanks a bunch for the help. Lamar

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Here we go again with the side ways pictures from the cell phone. I forget to hold the phone in landscape position. :(




 
raycow 
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raycow
Loc: San Francisco, CA
Reg: 11-26-02
01-24-18 02:30 AM - Post#2721947    
    In response to PLS

Your ohm readings are good. Those are about as close as you are likely to get under real world conditions.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
01-24-18 07:38 AM - Post#2721963    
    In response to raycow

Thank you Ray. It may be a little while but when I get it installed and the tank back in the car I will report how it works. I ordered a gasket this morning. Thanks a bunch. Lamar



 
PLS 
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Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
02-08-18 05:26 PM - Post#2723799    
    In response to PLS

I got my gasket that I ordered from:
Chevi Shop Custom Casting
9 E. Fourth St.
815-225-7565
gcoleman@frontier.com
Owner Greg Coleman

I am ready to install the sending unit but I have a couple of issues:

1. the main one, I can’t find a filter/sock that will fit the pickup tube at the local parts stores and was wondering what someone here on CT may have used. I have been trying to find some fine mess brass screen but no luck as of yet to make one.

2. The original screws are hex head rather than clutch head that I have seen talked about and instead of having copper washers they have what appears to be a rubber washer/o-rings. The thread side of the head is indented to accommodate the washer/o-ring. So I’m thinking of using tight fitting washer/o-rings from the local hardware store. Thoughts? Thank you in advance, Lamar




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1belair1954 
Contributor
Posts: 116

Reg: 12-24-12
02-09-18 01:58 AM - Post#2723841    
    In response to PLS

Hi I bought my fuel filter/sock from ecklers
https://www.lategreatchevy.com/full-size-chevy-gas...
They fit GM cars from 1958 to 1981 so should be fairly easy to find from other suppliers also.
I believe they come in two different sizes so measure the diameter of the pickup pipe that it attaches to.
They also sell the screws to attach the sending unit to the fuel tank but it does not show any sealing washers just lock washers. What I did was reuse my old screws and used fuel resistant Loctite sealant on the threads. I am not to keen on using O rings as these can break or deform when tightening another good option would be copper washers on the screws. I believe the original are some type of rubber sealing washer mine were perished.



Edited by 1belair1954 on 02-09-18 02:02 AM. Reason for edit: No reason given.

 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
02-09-18 11:48 AM - Post#2723883    
    In response to 1belair1954

Thank you Belair, I had looked at Ecklers but must have overlooked that. If I can't come up with a diy way I will probably order that. Thanks for the heads up on the Loctite sealant. Lamar



 
Hugomiller 
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Hugomiller
Age: 69
Loc: Florida and UK
Reg: 05-02-17
02-15-18 12:55 PM - Post#2724488    
    In response to PLS

I'd be inclined to think that 'O' rings from a hardware store would perish or go brittle in contact with gasoline. Fibre washers would be my choice I think. Or copper of course, but I'm wondering whether you can tighten these screws down enough to get a copper washer to seal.



 
ragtp66 
Contributor
Posts: 892

Reg: 12-09-07
02-15-18 05:26 PM - Post#2724508    
    In response to PLS

Lamar,

Here are the clutch screws
https://www.danchuk.com/ItemForm.aspx?Item=1488

also another source for the gasket which the nitrile really helps with the crappy gas:

https://www.danchuk.com/ItemForm.aspx?Item=195D



I have found a LOT of things from Danchuk that cross over to the xframes. Small stuff but they have a great catalog and I have always had excellent service from them.

Chris

Toys:
1958 Impala 2dr Hardtop Under Construction
1966 Chevelle Malibu Convert M20/350 Aztec Bronze
1987 Sea Ray Pachanga 22
2002 Cadillac Escalade EXT Parts chaser
2007 Trailblazer SS -gone and missed


Edited by ragtp66 on 02-15-18 05:27 PM. Reason for edit: No reason given.

 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
02-16-18 05:50 PM - Post#2724630    
    In response to ragtp66

The original tank gasket seemed to have been some type of paper gasket with sealant on both the sending unit and the tank side of the gasket when I cleaned them off. My thinking… the reason for the rubber type washer on the screw was to prevent the fuel that would come around the screw threads to be stopped by the washer. Since this was a thin gasket the screw could be tighten pretty good. I had remembered seeing a post on this topic and after searching I found it https://www.chevytalk.org/fusionbb/showtopic.php?ti... and this one seemed to be considered a good gasket so I ordered it from Greg. He suggested that I be sure and not over tighten the screws so I believe the copper washer route won’t work with this gasket seeing that you probably have to tighten it down pretty good to accomplish the purpose of the copper washer. I think that I am going to try to find some small fuel resistant rubber or fiber type washers and then use some fuel resistant type Loctite thread sealant as 1belair1954 suggested. If this doesn’t work I guess I will have to drop back to the 40-yard line and punt. Thanks for all the replies and will follow up on how it goes when I’m done. Again thanks, Lamar



Edited by PLS on 02-16-18 05:53 PM. Reason for edit: No reason given.

 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-09-18 10:54 AM - Post#2727005    
    In response to PLS

While getting ready to install the fuel sending unit I ran into the problem shown in the attached pictures. The gasket is not installed in the pictures so the gap would show up better. Any ideas, Lamar

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I got the fuel sending unit ready to install in the tank this morning and when I inserted it in the tank the bottom part of the flange would touch the tank but the top part would not go all the way down.


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With the unit installed without the strainer installed, 3 screws hand tight, the gap on top reveals approx. 4 threads while the bottom of the flange touches the tank.


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With the unit installed WITH the strainer installed, 3 screws hand tight, the gap on top reveals approx. 8 threads and again the bottom of the flange touches the tank.


Attachment: IMG_4156.JPG (140.09 KB) 11 View(s)


The sending unit is in really good condition and the pickup tube doesn’t seem to have been bent in any way. If something big enough had been laid on it or hit it I think that other parts on the unit would show some signs of damage and they don’t.




 
raycow 
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raycow
Loc: San Francisco, CA
Reg: 11-26-02
03-09-18 12:23 PM - Post#2727021    
    In response to PLS

Does the mounting flange area of the tank look to be deformed in any way? If not, shine a light into the hole to see if anything on the tank bottom could be interfering with some part of the sending unit.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Techhead 
Senior Member
Posts: 912
Techhead
Loc: Etobicoke, Canada
Reg: 10-25-05
03-09-18 01:14 PM - Post#2727026    
    In response to raycow

What Ray said.

OR is the filter bottoming out and not allowing the flange to sit flat?

I'll be Frank, this hobby isn't getting any easier.
58 Delray in disaray


 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-09-18 02:40 PM - Post#2727038    
    In response to Techhead

  • raycow Said:
Does the mounting flange area of the tank look to be deformed in any way? If not, shine a light into the hole to see if anything on the tank bottom could be interfering with some part of the sending unit.

Ray

Ray I had the tank boiled out, and they coated it inside with a sealer which looks like a stain type of coating rather than pain or something thick like paint. When you mentioned something inside I remembered that there was a dent in the tank but when I checked, it was on the fill tube end but at the sending unit end it has nothing inside or any dents in the area where the pickup tube would be. The area on the tank where the unit mounts is good.








  • Techhead Said:
What Ray said.

OR is the filter bottoming out and not allowing the flange to sit flat?

Frank the pickup tube itself bottoms out before the flange can sit flat. When I install it I can feel it bumping the bottom of the tank,





I'm wondering now if the tube originally had a strainer on it I'm just thinking out loud now, perhaps the unit would have looked like the pictures, not sitting flat but with the thin gasket that they used when it was pulled down flat it forced the pickup tube to be all the way down on the bottom of the tank. It could have forced the tube up closer to the float arm I believe without touching it. With the strainer install you can see in the picture that if the tube raised up very much it would also raise the float up giving a false reading on the gauge.

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With the strainer installed there is very little space between the tube and float arm so with the slightest movement of the tube being forced up or bent up would move the arm up.




 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-09-18 03:10 PM - Post#2727041    
    In response to PLS

I just looked in the Chevy Parts and Accessories Catalog and it does show a strainer but it doesn't look like mine, the tank does but the sending unit doesn't.

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PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-09-18 08:26 PM - Post#2727071    
    In response to PLS

I'm beginning to wonder if the sending unit that I have is actually the original. The Accessory Catalog, Lategreat Chevy, Impala Bob's, Advance Auto and Auto Zone all show the same style for 1960 Chevy's which is like the picture attached. I took this tank out 40+ years ago and I have no clue if this sending unit is the one that came out of it or not. If it isn't the original I have no idea where this one came from or where the original may be. Can anyone confirm if in fact the first picture of the unit or this one is correct or do you think that both styles could have been used back then. Thanks for any help. Lamar

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Techhead 
Senior Member
Posts: 912
Techhead
Loc: Etobicoke, Canada
Reg: 10-25-05
03-09-18 08:59 PM - Post#2727074    
    In response to PLS

Have you test fit the sending unit without the aftermarket filter? Just to see if the flange will sit flat.

I'll be Frank, this hobby isn't getting any easier.
58 Delray in disaray


 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-09-18 09:05 PM - Post#2727076    
    In response to Techhead

Yes, fitted with and without screen. As per the attached pictures above, without the screen 4 threads of the top screw shows, with the screen 8 threads show. I looked at lategreat again and the unit for the station wagons look like the unit that I have.



Edited by PLS on 03-09-18 09:07 PM. Reason for edit: No reason given.

 
1belair1954 
Contributor
Posts: 116

Reg: 12-24-12
03-09-18 09:50 PM - Post#2727084    
    In response to PLS

Hi again I reinstalled my Fuel sending unit in my 1960 El camino 6 months ago. Looks like yours it had a filter/sock on it from the factory but it was decomposed all that was left was the metal ring. I bought my sock from Ecklers and installed to the original position. I had no issue no gaps or problems like yours when I reinstalled the sending unit. Wagons and Elcaminos had completely different fuel tanks to the other models. I wonder if yours is from a wagon and not fitting the impala tank. Must be binding on something is your tank damaged at all?




Edited by 1belair1954 on 03-09-18 09:51 PM. Reason for edit: No reason given.

 
PLS 
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PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-10-18 08:26 AM - Post#2727104    
    In response to 1belair1954

The tank isn't damaged at all in the area of the pickup tube. I'm surprised that no '59 or '60 guy here doesn't have a unit laying around, had one out, ever changed one This afternoon I am going to check with a friend of mine at Advanced Auto. He's an old timer and works the commercial counter and actually still uses the huge parts books and see what he can do.



Attachment: IMG_4176.JPG (128.92 KB) 10 View(s)


This is in the assembly manual and it looks like mine but it is for the station wagon.


Attachment: IMG_4177.JPG (101.3 KB) 9 View(s)


This is also in the assembly manual but doesn't look like mine but does look like the ones listed for Impala at lategreat, Bob's, Auto Zone etc




 
Chair City 
Contributor
Posts: 498
Chair City
Loc: Thomasville, NC USA
Reg: 01-24-04
03-10-18 12:25 PM - Post#2727128    
    In response to PLS

Lamar
I found this one out in the garage. Pretty sure its a 59 or 60. Doesn't look like yours at all though. It has a tab with a ground wire attached too. Maybe someone else can verify it. Hope this helps



1960 Impala Spt. Cpe. Now in my son's garage


 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-10-18 02:58 PM - Post#2727138    
    In response to Chair City

Thank you Chair. I believe that the one that you have is what I should have. There's not enough of the picture above to see it but there is a ground wire on the drawing in the assembly manual. The commercial counter at Advance Auto isn't open on Saturday or Sunday so the guy want be back until Monday, I will check about getting one through him. What's driving me crazy now is where did this sending unit come from and where would the original one be. As I said above the car has been torn apart for 40+ years and I am really surprised that how few parts that I haven't been able to find. Thanks again, Lamar



 
Jens 
"12th Year Silver Supporting Member" & 58-60 Subject Matter Expert
Posts: 7196
Jens
Loc: Iowa.
Reg: 04-21-02
03-10-18 04:27 PM - Post#2727145    
    In response to PLS

Chair got it right. Here's an original sender from a 60 Impala tank next to an original 60 wagon sender. The Impala one is on the right>>














 
Aussie_Chevy_Nut 
"6th Year" Silver Supporting Member
Posts: 575
Aussie_Chevy_Nut
Loc: Australia
Reg: 11-26-02
03-11-18 01:34 AM - Post#2727168    
    In response to PLS

Hi Lamar,
Have you chcecked out that your tank is the correc type?
Years ago when I had my '59 Hardtop worked on we found out that the tank was incorrect and we eventualy installed a new correct one, as well as a correct sender unit. I was told that it was for a later year.
That said, I refer to recent discussions on CT regarding faulty floats being corroded by poor quality modern fuels. I am still going to replace my sender unit even though I only installed it a few years ago.
Australian fuels are supposed to only have ethanol in those pumps that are marked as such at the gas station.
Good luck, John




 
Aussie_Chevy_Nut 
"6th Year" Silver Supporting Member
Posts: 575
Aussie_Chevy_Nut
Loc: Australia
Reg: 11-26-02
03-11-18 01:40 AM - Post#2727169    
    In response to PLS

Hi Lamar,
Have you chcecked out that your tank is the correc type?
Years ago when I had my '59 Hardtop worked on we found out that the tank was incorrect and we eventualy installed a new correct one, as well as a correct sender unit. I was told that it was for a later year.
That said, I refer to recent discussions on CT regarding faulty floats being corroded by poor quality modern fuels. I am still going to replace my sender unit even though I only installed it a few years ago.
Australian fuels are supposed to only have ethanol in those pumps that are marked as such at the gas station.
Good luck, John




 
PLS 
"8th Year" Silver Supporting Member
Posts: 1523
PLS
Loc: Smyrna, Georgia
Reg: 06-07-12
03-11-18 04:01 PM - Post#2727227    
    In response to Aussie_Chevy_Nut

  • Jens Said:
Chair got it right. Here's an original sender from a 60 Impala tank next to an original 60 wagon sender. The Impala one is on the right>>







Thanks Jens. I’m going to check tomorrow on a sending unit locally. As I have stated, I have no clue where this unit came from or where the original would be. In the picture of the face of the unit in my post 3-9-18 you can see that the terminal is threaded but the original wire to my tank has a push on plug and also it doesn’t have the tab with the ground wire as does Chairs or yours. What do you think that this unit could have been used on?









  • Aussie_Chevy_Nut Said:
Hi Lamar,
Have you chcecked out that your tank is the correc type?
Years ago when I had my '59 Hardtop worked on we found out that the tank was incorrect and we eventualy installed a new correct one, as well as a correct sender unit. I was told that it was for a later year.
That said, I refer to recent discussions on CT regarding faulty floats being corroded by poor quality modern fuels. I am still going to replace my sender unit even though I only installed it a few years ago.
Australian fuels are supposed to only have ethanol in those pumps that are marked as such at the gas station.
Good luck, John




John as far as I know the tank is correct. I purchased the car September 1962 and it was practically new so I assume that it is the tank that came on it. The unit is in really good condition whatever it came off of. The only time that ethanol gas has been involved in the life of the ’60 is when I had the engine on a test stand, and ran it to break in the cam, January 2014, other than that only leaded gas was used. I stopped driving the car probably 1970 before leaded gas was banned. It’s hard to find a station around where I live that provides ethanol free gas.








 


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