1963 Fuel Filter

[Harry S.]

I have a silver and black fuel filter ( no grooves ) for the 63. Is there a difference between an original and the current reproduction's.

Why I ask. I've used originals in the past, a quick removal and installation with the brass fittings at both ends, no problems, no leaks.

Today I installed a reproduction black then a reproduction silver, they both leaked at the brass connection. After an hour I gave up and used Teflon tape. Problem solved.

Is there a quality problem with the new reproductions??

[Chris H.]

Re: 1963 Fuel Filter

Harry I’d be a little leary of the Teflon tape as bits of it have been known to break off and mess up needles and seats. Did you try copper flare fittings on the flare mating surfaces?

[Harry S.]

Re: 1963 Fuel Filter

Chris, it's not the flare, it's the threaded part of the brass (male side) to the threaded part of the filter (female side).

[Gary B.]

Re: 1963 Fuel Filter

Harry,

Could it be a problem similar to what Rich Mozzetta described for 58-62 repro fuel hoses?

https://www.forums.ncrs.org/showthre...Rich+fuel+leak

Gary

[Jim L.]

Re: 1963 Fuel Filter

Chris Hewitt's advice is spot on. Do NOT use Teflon tape on fuel fittings. If you must use a sealant, use Teflon paste instead.

[Chris H.]

Re: 1963 Fuel Filter

Harry I see. Reminds of a problem I had with the heater hose / intake manifold fitting leaking from the threads. I used a reproduction fitting that even though I tightened it just beyond spec, it still leaked. With an aluminum intake I was being super careful. Fortunately I saved the original fitting and that one works great.

All I can think is that the repro thread pitch / dimensions are just slightly “off” contributing to the leaking.
EC319E27-EDE8-4DF9-9818-AB34E9D846BC.jpg

[Thomas B.]

[Harry S.]

Re: 1963 Fuel Filter

Tom, thanks.

I'll change to the Teflon paste as Jim suggests.

[Harry S.]

Re: 1963 Fuel Filter

Removed the filter earlier today. Cleaned out the Teflon tape and reinstalled with the Teflon paste. No leaks.

I exchanged emails with the well known supplier. He said the problem with the original design had been fixed and that there would absolutely be no problem with current fuel filters he supplies.

Please add to this thread if you have a recent purchase and it leaks.

Thank you.

[Thomas B.]

Re: 1963 Fuel Filter

I don’t know if we’re dealing with the same supplier but I bought mine in August of 2022 and as I said it leaks even with thread sealer. I did report the problem to them at the time and they offered no help. Just insisted it was a correct filter and there must be something wrong with my fittings.

[Harry S.]

Re: 1963 Fuel Filter

Tom, you have an email
Harry

[Thomas S.]

Re: 1963 Fuel Filter

I dread dealing with any flared fitting for this exact reason. While the Teflon paste might be the fix, isn’t the underlying issue still unresolved and therefore potentially dangerous when it involves fuel supply? The threads are providing the force to hold the flare against the mating surface. If there is a leak at that flare surface, the fuel could potentially exit from the circumference of the fuel line where it passes through the nut.

The is a post that recommends applying a particular lock-tite sealant to the flare surface which stops the leak at its source. That what I used when I had a similar problem.

https://www.forums.ncrs.org/showthre...hlight=Loctite

https://www.forums.ncrs.org/index.php

[Harry S.]

Re: 1963 Fuel Filter

https://www.forums.ncrs.org/showthre...hlight=Loctite

https://www.forums.ncrs.org/index.php

Tom, it's not the flare attachment. It's the brass fitting into the fuel filter.