mid year tank sender leak

[Michael F.]

where the wires attach to fuel sender on 67, slight weap/leak around connector and the rubber grommet .. anyone make these??? sender org and works fine so don't want to rebuild

[Joe L.]

Re: mid year tank sender leak

where the wires attach to fuel sender on 67, slight weap/leak around connector and the rubber grommet .. anyone make these??? sender org and works fine so don't want to rebuild

Michael-----


Did you try just tightening the nut?

[Edward J.]

Re: mid year tank sender leak

Mike, Do you have the sender out? If so I believe the terminals have nuts on the studs??? can they be tightened or removed to maybe use a RTV type sealant??

[Joe L.]

Re: mid year tank sender leak

Mike, Do you have the sender out? If so I believe the terminals have nuts on the studs??? can they be tightened or removed to maybe use a RTV type sealant??

Edward-----


Most RTV sealer is not resistant to gasoline. It will degrade it rapidly. The only RTV that is gasoline resistant is a FLUROELASTOMER RTV. You won't find this in auto parts stores and it's very expensive.

[Jim S.]

Re: mid year tank sender leak

Edward-----


Most RTV sealer is not resistant to gasoline. It will degrade it rapidly. The only RTV that is gasoline resistant is a FLUROELASTOMER RTV. You won't find this in auto parts stores and it's very expensive.

7010007_lll_380112_pri_larg.jpgThis will work. Resistant to gas, oil and brake fluid. Available in most hardware and auto parts stores.

[Michael F.]

Re: mid year tank sender leak

Joe and Edward, tried to tighten..no go, Jim, will check out seal all if no rubber parts available. thanks.

[Ara G.]

Re: mid year tank sender leak

MikeI just had similar problem with my silver 67. It's going to get worse. Mine did. Started with a weep, then progressed to a drip. Not safe. I too have my original sending unit in the car. I removed the tire tub, the sending unit and decided that since it was out, I would send it to Wolf and have it rebuilt, but not aesthetically restored. Found an NOS O ring, and used the original locking cam. I did a lot of research into the items, and the reprop O rings don't seal well at all and are prone to leak. I would find an NOS O ring and fix the problem. I didn't want to do it, but it was straight forward job and went easy. Look up my post from not long ago at all on this. Good luck....ARA

[Ara G.]

Re: mid year tank sender leak

here is the thread....https://www.forums.ncrs.org/showthre...king-Need-help

[Domenic T.]

Re: mid year tank sender leak

Ara,
I rebuilt a few senders and used O-rings made especially for gas. They are cheap and were available at Aircraft Spruce. We have to use them in aircraft fuel systems. They last forever and there is also a grease you can get to lube any thing that needs lube in the fuel system if needed.

DOM

[Gary B.]

Re: mid year tank sender leak

Ara,
I rebuilt a few senders and used O-rings made especially for gas. They are cheap and were available at Aircraft Spruce. We have to use them in aircraft fuel systems. They last forever and there is also a grease you can get to lube any thing that needs lube in the fuel system if needed.

DOM

Dom,

I'm confused by the description for the O-rings on the Aircraft Spruce website. It says:

"These O-rings, AN6227B series, are not fuel resistant. For fuel resistant O-rings, see the MS29513 series. MS29513 are aviation fuel resistant, but not resistant to automotive fuel. Search for MS29513 on our web site to find the page with the fuel resistant O-rings."

When I search for MS29513 it says:

"These MS29513 series O-rings are resistant to fuel and are ideal for applications such as fuel injection connections and primers. A small amount of fuel proof grease applied to these O-rings helps the installation and operation of primers. Not resistant to automotive fuels."

So, it's not obvious to me that either type of O-ring from Aircraft Spruce will work with automotive fuels, and I suppose the problem in the ethanol. Does Aircraft Spruce have a 3rd type?

Gary

[Domenic T.]

Re: mid year tank sender leak

Gary,
I'll check that out. Some aircrafart with low compression are allowed to use auto fuel (highest otane) and I have used wthout problems in my planes. I stopped using it after my tank breather hose turned to powder. The O- rings are still good that I used.

DOM

[Domenic T.]

Re: mid year tank sender leak

Gary,
Just checked the STE (supplemental type certificate) for arcraft use and it only allows MTBE auto fuel, (Methanol) and no ETBE auo fuel (etaonol).
So my post (Aircraft pruce) won't work.

DOM

[Joe L.]

Re: mid year tank sender leak

Gary,
I'll check that out. Some aircrafart with low compression are allowed to use auto fuel (highest otane) and I have used wthout problems in my planes. I stopped using it after my tank breather hose turned to powder. The O- rings are still good that I used.

DOM

DOM------


I do not think that automotive fuel that contains ethanol is approved for use in those aircraft that have received an STC allowing the use of automotive fuel.

[Gary B.]

Re: mid year tank sender leak

Gary,
Just checked the STE (supplemental type certificate) for arcraft use and it only allows MTBE auto fuel, (Methanol) and no ETBE auo fuel (etaonol).
So my post (Aircraft pruce) won't work.

DOM

Dom,

In another posting from back in October John DeGregory suggested buying an O-ring made out of viton from McMaster Carr, MSC, etc. Viton is resistant to ethanol.

Gary

[Michael F.]

Re: mid year tank sender leak

my o-ring is not leaking, it is the rubber grommet that the electrical connection goes thru, there are 2 side by side.