Tank cleaning in situ for the lazy:

Remove small drain bolts, remove large drain bolts. (Have new SEALS in advance).

disconnect any lines or hoses connected to tanks,

get a water pressure machine and connect it to a garden faucet for constant water supply,

insert pressure machine pipe into tank's filler and spray away until all the crud comes out.

repeat from below up.

repeat from above.

allow tanks to drain and dry overnight in a Hot Mid Summer's Night.

Don't worry be happy.

If you want to get really involved, remove the Senders from both tanks and pressure clean from the rear, even better.

 

When I got my car, the PO told us that during the Resto-Mod in 1986 he had the tanks coated with the slurry in fashion at the time. I think it was the same stuff they used in aircraft tanks.

Some say the stuff flakes off over time, but over 30 years later I have had NO trouble with plugged filters or pick-ups, I have no leaks or any of the other horror stories that have been bandied about, and when I look into the tanks I see no gaps.

I suspect success is directly tied to the skill of the applicator and whether there are any missed areas.

If I had to do it now (I'm Very thankful I don't) I would have the tanks coated. But that's just me.

(';')

 

Both of my tanks were in decent shape but the PO put in a fuel cell and high flow fuel pump. Not a big fan of the install but it will work. I removed the tanks and they are on the old store called EBay.

 

what happened at Jaguar at the end of 1967 ??

The twin tanks in the S type and the 420 (both models which came before the Series 1 XJ-6 and which were built until 1967), were made of STAINLESS STEEL.

I can shine a light into the tanks of my '65 S type and they are shiny inside, unrusted, non-leakers.

Same twin tank principle as the XJ-6 Series 1, 2, and 3, just non-rusting tanks.

 

I would guess the bean counters gained majority on the Board.
Like Ford in the days of Pinto; "We can save $2 per car if we don't do this."
Well, probably wasn't exactly $2 but you get the idea.....
(';')

 

.

around that era BL(British Leyland) took over Jaguar?

they were also in the steel business, and so they developed a better grade of steel, it was gaurenteed to rust quicker, and help with recycling products!

theory was would sell more cars, U NO it does make some sense!

 

haha!! "bean counters". a better grade of steel !! No wonder S type, 420, MK-X and 420-G twin tanks are still unrusted even in abandoned in the woods cars.

 

Geneo,

I think it's more a question of how often you will use the car. If driven daily with regular fill ups, the tanks usually don't rust as moisture will flow through the system and get burned off or whatnot. Tank rust seems more prone in cars that sit for 6-8 months of the year like some classic cars up north, and in that case lining may be a better option. I think a lot of the "liner horror stories" are of the "DIY in a can/As seen on TV" variety. Moral- Don't try this at home...

 

I think a large number of the horror stories stem from inadequate cleaning before applying the liner. Cleaned my tanks with Berryman carburetor cleaner (highly caustic) and lined them with POR-15 tank sealer. The first tank I lined was my Spitfire and that was 15 years ago. I was having varnish flakes come off the walls of the tank and they were clogging the fuel line where it attached to the tank. I had driven the car for over a decade with no issues and the problem appeared all of a sudden. Had a radiator shop cook the tank out, but that didn't solve the problem. Lining the tank did.

Lined my E-type's tank 10 years ago (same issue as the Spit) and my TR7's (had some small rust holes) 4 years ago. I've not had any issues with any of them.

That being said, your tanks might be fine with a good cleaning if the rust is as minor as you say. If Blue Six proves its mettle as an everyday driver I may spring for new tanks down the road.

 

after reading so much about rusty fuel systems, and the associated problems!

i know why i use Plastic tank , and aluminm lines, Stainless steel pumps and filters!

i guess you do it your way, and i'll do it my way!

 

Back to my Ford Escort days. The new model pre-production runs were taking place. The bean counters came in, and they "thrifted" the car. Customers began complaining - we "unthrifted" the next year!!

 

this reminds me of Tina Turner's song: "What's Ford Got To Do With It?"

 

Series 3 tanks work, switch to series 3 senders or a full tanks will register 5/8 on the gage. Yes, it is extra plumbing work, but doable.
wasted my time, money and energy on the series two tanks - electrolysis, vinegar, lacquer thinner, transmission fluid, blah blah blah.
Cheers