Fibre or Copper washer?

[Treetrimmer]

Hi Folks,

I'm working my through the Petrol supply system on my 1965 3.8 "S" type, and have come across a different types of sealing washer, and wondered which ones are correct.
1) The drain bolt at the bottom of the fuel tank filter assembly has what appears to be a plain metal washer. It seals against the brass of the bottom of the tank filter.
2) The "Banjo joint" on the exit of the fuel bowl has fibre washers.

3) The "Banjo joint" on the Carburettor fuel inlet has fibre washers.

4) On a slightly different theme, I'm considering replacing the plastic fuel piping around the petrol pumps with E10 rated rubber piping ( see a previous post from Glyn). Are special clips required for petrol piping, or would standard Jubilee pipes be correct?

As ever, I'm grateful for any advice.

Richard

[John Quilter]

Well for what it's worth, I've been running E10 ethanol gasoline for well more than 12 years with no signs of deterioration of the plastic fuel lines.

[Glyn Ruck]

Sorry. Missed this. Fibre washers are correct.

Standard Jubilee clips are just fine for rubber fuel hose.

Early nylon hose fitted to Jaguars seems happy with E10.

Later OE genuine nylon hose supplied by Jaguar not so.

This took approx. one week of Sasol 10 to 12% alcohol laced fuel to fail.

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[Treetrimmer]

Hi All,

I've found another puzzle with my 3.8 S type, whilst tracking down a minor fuel leak. The areas in question are the banjo bolt unions for the fuel feed to the carburettor float bowls. At one end of the inter-connecting metal fuel pipe, ( carburettor "A") there is a recess to partly accept a fibre washer, between the bolt head and the banjo union. At the other end of the inter-connecting pipe ( carburettor "B") there is no such recess, although it looks as if an aluminium washer has been forced in.

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[Glyn Ruck]

Fibre washers both side of banjo bolt to carb lid. Note 4 required for 2 banjo bolts. Genuine Parts Manual.

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IIRC the drain cap on the lid of the float bowl was Aluminium washer above & serrated Fibre washer below.

I used fibre both sides of filter banjo bolt because an unmolested original car was like that.

[Treetrimmer]

Hi Folks,

As some may remember, my S type "journey" has to be fitted around my wife's illness, but recently I've been able to spend some time on my car.

After a prolonged carburettor rebuild, I set about getting the engine running, and the carbs re-tuned. All was going well, I'd got a nice idle, and was about to fine tune the mixture, when the engine cut-out, and fuel was pouring from the A.E.D. (I'm not sure which happened first, the fuel leak or the engine cutting out)
After checking the Workshop manual and the Burlen carburettor book, I reasoned the fuel level in the float bowl was incorrect. As far as I can ascertain, there is no fuel "cut-off" within the A.E.D. Itself. I purchased a new fuel cut-off needle assembly, a new float bowl lever and pivot pin (they both showed signs of "previous owners") and checked the float itself was intact.

After careful re-assembly, I turned the pumps on , and fuel was again pouring out of the air intake holes on the A.E.D.

At this point I'm slightly stumped, and would grateful for any helpful suggestions.

Regards to all, Richard

Richard

[Glyn Ruck]

What is your fuel pressure? Should not exceed approx 3 psi or you will sink the floats. Is your float on the AED carb feed free of any fuel. They can leak. I would replace the float if it shows even a hint of leaking. Shake the float to ensure it has no fuel inside it. New floats are always a good idea. Presume your float level setting is correct. Setting that carb fuel level a little low will do no harm. Hope Cass sticks his nose in. He might have some better ideas as to why that carb is flooding & leading to the AED flooding.

Hope you got the Viton tipped needle with the seat & no dirt in needle & seat.

Where is your AED needle set to? Although unlikely to cause this.

[NigelW]

Does this happen with both pumps/tanks? Just thinking one pump might not be shutting off and over pressurising the system and overwhelming the float needles.

[johnthejagman]

while talking about E10 last winter I left half a tank in my S-type I happened to look at the fuel filter glass the fuel was white. I soon discovered the white plastic fuel float had dissolved in the E10

[Glyn Ruck]

We have lived with E10 max 12 in SA for over 30 years and know all the problems it can cause & especially with elastomers. I have also lived through all the problems in Brazil on pure alcohol both hydrous and anhydrous. All fuel systems in Brazil are made out of pure zinc. A hint of yellow metal anywhere near it or in the alloy and corrosion problems become enormous.