I am fixing my rear valence and drained the tanks because of threat from sparks. Ordered fresh seals for the gas tank sump brass plugs from SNG Barratt. Original were Aluminum and Rubber. Heard from SNG today that the rubber seal I ordered was not available due to a manufacturer defect issue. They're going to send me a fiber one instead. Does anyone know of any special precautions or fitting tricks for the fiber (like put some rtv or pre-soak or whatever) seal. I don't want this thing leaking. Series 3, 1984 XJ6 VandenPlas.

 

I'll offer up what I am using to seal the large drain plug in the bottom of the tanks. A hydraulic rated (fuel/oil resistant) O-ring (I think I am using 1/8"dia ) that is a slight stretch-fit over the threads and lays naturally in the recess under the plug flange. Will give a tighter and more acute contact area than a wide flat washer, just don't over tighten a cut the rubber.

Dave

See additional information in post #19

 

Do you have a link to the "hydraulic rated (fuel/oil resistant) O-ring (I think I am using 1/8"dia ) " you are talking about? I don't have the first idea where I could go get one and I don;t have enough knowledge to order one based on your description, though I understand the concept of what you are suggesting.

 

FWIW the fibre gasket I got from NAPA is leak free after 3 years. Installed dry.

https://www.jaguarforums.com/forum/x...c26310-196039/

Cheers
DD

 

Hi Muttony, I may have created a "how long is a piece of string" suggestion here. I am lucky enough to have a hydraulic supply store and an industrial hardware store in my town. Neither have stores outside of Alaska. I just googled Ace Hardware, Amazon, McMasters and honestly didn't find something I would point you to. Mostly O-ring kits for specific equipment. My industrial hardware store has a section/display of small, odd parts and pieces, very much like the "help" section in most larger car parts stores. O-rings are not that hard to find, I just can't give you the name of a source in your area. I definitely would not order them, postage would be much more than the cost of the part. I looked at my local Napa store and they have the fiber gaskets in stock that Doug has suggested. I think I will pick up a couple tomorrow as spares, this may be a better choice for you, from an availability stand point if you have a Napa near-by. I don't think Doug's experience can be faulted.

 

if you don't trust the fiber seal, apply HYLOMAR BLUE to it.

 

Ooo! Hylomar be Good Stuff!
It's one of the staples here.
(';')

 

Tightened up the seal that came from SNG and it leaked like it wasn't there.

 

Juts ordered the one from Napa that Doug mentioned. I live in Massachusetts and there are no helpful knowledgeable old timey part stores. Just new ones where you can get twenty five flavors of air freshener, but you can't get a selection of O-Rings or crush washers or anything like that. Getting used to paying $5.00 shipping for .67 items.

I'm going to edit this to make it useful to folks in future. So original order was for SNG Barratt for C26310 which is a rubber gasket. SNG said manufacturing defect and they weren't available so you might use Older style Fiber one -> C1617. Moral ofthe story is don;t bother with C1617 on a Series 3, it won;t work. It is too thin to seal. You'd need a lot of Hylomar to make that work. The Plug will tighten up to impossible to turn and the gasket will look like it is kinda tight, but it will leak with a cup of fuel. I'm ordering the one Doug said. Won't get here til Wednesday. I'll update it if it works.

 

the large rubber seal for the large drain plugs under the tanks is the same seal used since the 1960's in all twin-tank Jaguars starting with the MK-X, then the S type, then the 420, then the 420-G, then the Series 1, 2, and 3 XJ-6 and XJ-12. Are those large seals the ones that SNG does not have?

I think I have two spares of those but can't recall the part number.. I can look for them on Wednesday or Thursday, it depends on how removal of the engine of my 1965 S type goes tomorrow. Yes the engine is being removed and it has been a p.i.t.a. to dismantle all the ancilliaries. But it has to come out sooner or later.

 

Hi,
I might have a extra set of the rubber ones as well, I'll check later tonight and let you know tomorrow. I can't remember which brand they are, might be unipart. I did notice when changing mine that if over tightened they would twist and then leak, just past snug worked.

Cheers,
Brian

 

Are those large seals the ones that SNG does not have?

Yes. I ordered them from them. The website said they were in stock, but there was a manufacturing defect so I was told.


C26310 is the large rubber one. I looked up the part in the parts manual before I ordered it. Long story but the guy there suggested C1617. I said OK, because he indicated it would work (or might work to be fair) and the valence repair was coming to a finish and I didn't want to wait around indefinitely for the manufacturing defect to get fixed. But it didn't. This is it from Welsh (whom I didn't get it from so I don't **** someone there off). My work is done except to get the fuel tanks sealed up and gas put back in.

 

Muttony, when you can't find an adequate gasket for something, making one (from 1/8" rubber sheet in your case) is usually not very difficult. "Now you tell me", right?

Dave

 

OK. Time for the thread wrap. Once again. Doug has come through. To call Doug's knowledge "encyclopedic" is an insult to the internet because Doug should just be renamed "The Internet". The obscure part he referenced worked. At least it has for now. I've put a few gallons of gas in each tank and so far so good.

So for future reference and easy look up, the rubber (the NAPA one is neoprene not Fiber! And I put it on 1/2 hour ago so for future folks, I am sure of it!) gasket is NAPA Part number 730-9506, and is called a "Gasket - Fuel Strainer" per the box it came in. The Box says "NAPA" and "Balkamp". Warning: I think this part might become obscure at some point because apparently it was for a glass sediment bowl on a late 1940's Ford Tractor, How this is available, I have no idea, but was able to order it from NAPA. Cost $4.76 each with my AAA discount.

Also, be aware. It appears to be much thinner than the original Jaguar rubber one. Only slightly thicker than the fiber one I mentioned above that didn't work. It is not 1/8" thick by any means. I spread a tiny bit of motor oil over both surfaces of the gasket so it wouldn't easily catch as I was tightening it up. And Bob's your mother's brother.

 

Glad it worked out !


Cheers
DD

 

Once I discovered it I've found use for it on several oldie cars--30s-40s-50s vintage. A lot of those old glass-bowl sediments traps are the same or very similar in dimensions

Cheers
DD

 

Muttony:

At times the simplist part is the very devil in the way of completing a task...

Super, you got it done.

Circa 2005 or so, I drained both my tanks. I ad tanked up in Stockton, CA, It was on my way home that my car had it's disaster.

So, I wanted fresh fuel for it's "new" engine. I thought I was prepared to handle a boat load of fuel What a mess.. When i removed the plugs, the large part came out.

I reused the O rings. So far no leaks...

If you have an ACE franchise in your area, you may find a lot of things there that are useful in auto repair. The local one has a great selection of fasteners. Lots of foofoo, but, I just ignore it..

 

Sorry I got to this thread late, and glad you got a solution. Moss Motors has the correct rubber gaskets, sold in pairs. # C26310. Washer Gas Tank Plug. I have a different gas tank saga I will ask about about in a separate post

 

At some point in the past year, I commented on someones thread, that I was using an O-ring to seal the large drain plugs of my gas tanks. I don't believe this is a good idea anymore.

As I was re-attaching the lower gas tank covers today, I noticed what looked like cracks around the perimeter of the O-ring. After removing one of the plugs, I could see that was the case. I have not put gas in the tanks yet, so no damage/leakage has happened. In the previous thread, Doug offered a Napa P/N for an old fashioned sediment bowl gasket that would work perfectly, but no one, including Napa, has one in my area. I went to my local commercial Rubber and Rigging store and they made me half a dozen in about 5min. For free. They have dies for cutting gaskets.

I wanted to get this out there in case someone saw the thread and planned to use an O-ring. In this application, I don't feel an O-ring is a good idea. Couple of pics.

Dave