67 fuel sending unit

[Enzo C.]

Gents, I have a small leak in my newly rebuilt sending unit that has been in the car barely 6 months. Any suggestions would be greatly appreciated

[Stephen L.]

Re: 67 fuel sending unit

Hard to make a suggestion when you didn't state where the leak is..... If you need a permanent sealant JB weld is a possibility......

[Stuart F.]

Re: 67 fuel sending unit

I'm sorry, but I too don't know of what sending unit you speak. Are you referring to the fuel pump, the fuel (tank) level gage or sending unit in the tank? Please clarify. If you had a 63, 64 or 65 with fuel injection we probably would understand, but you said a 67.

Stu Fox

[Enzo C.]

Re: 67 fuel sending unit

Sorry gents, I should of been more clear... The sending unit at the gas tank is moist and a small leak is present. I wouldn't apply JB weld in case it has to be taken apart in the future ???

[Joe R.]

Re: 67 fuel sending unit

Enzo,

The gasket and lock on stock gas tanks has problems as it has to be centered carefully so that you will get equal compression on the rubber gasket. Try draining the tank and removing the sending unit as you observe the position of the gasket. I would recommend getting a new gasket and installing carefully.

JR

[Ara G.]

Re: 67 fuel sending unit

Enzo, also the replacement rubber gaskets are not the same thickness as the originals or NOS ones. I had this very problem on my L79 car. In fact, do a search on the DB and find my thread. A few of us had the same problem. In fact, we even discussed measurements and thickness of the replacement o rings. Also, as Joe points out, centering the gasket is imperative, as is using the correct tool to lock the unit to the tank is essential as well. I have the tool (it's like 15 bucks) and I would happily loan it to you if you don't have one. ARA

[Larry M.]

Re: 67 fuel sending unit

Enzo, also the replacement rubber gaskets are not the same thickness as the originals or NOS ones. I had this very problem on my L79 car. In fact, do a search on the DB and find my thread. A few of us had the same problem. In fact, we even discussed measurements and thickness of the replacement o rings. Also, as Joe points out, centering the gasket is imperative, as is using the correct tool to lock the unit to the tank is essential as well. I have the tool (it's like 15 bucks) and I would happily loan it to you if you don't have one. ARA

I agree. Enzo needs to buy a new GM rubber gasket and a new GM retaining ring and try again. They are a bit hard to find, but it can be done. Get the part numbers and then do a Google search. They are still out there.

If the electrical connectors are weeping gas, you should be able to tighten up on the connector nut if the unit is the original type.

Larry

[Enzo C.]

Re: 67 fuel sending unit

Actually saw tonight that the connector nuts were weeping... Have to go through it and I'm sure the new gasket,tool and tightening will solve the leak problem.. Thanks very much

[Roger P.]

Re: 67 fuel sending unit

Enzo, if it's the electrical connectors that are leaking, then you should be able to simply tighten up the nuts a bit and that should do it. The original sending units had nuts at the connectors while most of the reproduction units have press-in connectors that eventually crack and leak. Don't remove the sender or replace the gasket until you try this simple repair first.

Good luck, Roger

[Enzo C.]

Re: 67 fuel sending unit

Hi Roger,
I will definitely try your suggestion first... sounds like this is a common problem on original fuel sending units.....