Fuel filter?

[RichardSEL]

Just putting back together this Mk IX with a 420G 4.2L engine in it.
It did start and run smooth when I bought in Denmark two years ago.
And it ran briefly when it was imported.

But due to reaching various inner wing areas for welding, most ancillaries were stripped out.
This is in the box of parts what looks like the fuel filter of a 420G of the time?
Could anyone confirm? The top's been lost, and there's no filter cartridge inside

[oldtimer]

Richard,
I'm sorry, I don't recognise that filter from any Jaguar. However I have just looked in my 4.2 Mk 10 Service Manual and it clearly shows a glass sediment bowl type filter mounted onto the inner wing adjacent to the carburettors.

Please come back if I can be of further help.

You my be interested to know that I fitted a 420G engine into my Mk 7M complete with 3 SU's many many moons ago. The trouble I had was that the steering column got in the way of the back carb. So I turned up three spacers from Tufnell (do you remember that stuff) which pulled all three carbs away from the head. It worked a treat and performed like a train in the night, it was a real flyer. Many years later I transferred that same engine into my 1966 S type. Achieving that embodied some pretty serious surgery that I would not like to embark upon again.

I still have those spacers in the workshop complete with the long mounting studs courtesy Rolls Royce aero engines - that's another story

[davidr]

Is it maybe a brake or clutch fluid reservoir?

[oldtimer]

Oh Damn,
I've just put the book away. Another look shows a clutch reservoir but with only one connection on the bottom unlike the picture above. I was surprised that the MK10 had two brake reservoirs both square and only one bottom connection each.

That's ya lot for tonight folks, putting the book away again and I'm off to bed

[RichardSEL]

Thanks for the replies guyz... It was in the box of bits that I got back after another unsuccessful re-build shop had done bits and pieces of bodywork and then not completed.

Given that I've found bits of XK120 distributor (DVX6A) in the box too with the current body shop telling me the body's there but no cap or rotor, seems that that the previous shop just got together whatever parts they had laying around and shoved them in my bin

There's an electrical petrol pump solenoid-end too -- AZX1308 -- I'm assuming the 420G's 4.2L had a mechanical fuel pump?

This 4.2L is already in courtesy of a previous owner. It started in Denmark where I rescued it, and when I took it off the trailer in Norfolk. Moving it about, didn't notice any steering column fouling anything...

[oldtimer]

Hi Richard,
You have not mentioned whether you have a two or three carb set up in your Mk 1X?
Both the Mk10 3.8 Litre and 420G 4,2Litre had 3 SU Carb set ups together with two SU fuel pumps in the boot. I simply do not know of any Jaguar with a mechanical fuel pump.

The 4.2 engine fitted to your Mk IX could have come from various donor vehicles, The 420 model which resembles the early S type only had a twin SU Carb set up, this being the same as XJ 6's. However if the engine came from a 3 Carb set up then perhaps a different intake and twin carb set up has been installed.

From what I remember all those years ago, no way would the third carb nearest to the bulkhead go in with the large diameter steering column in the way, hence the need for the spacers.

Finally, something you may care to bear in mind. From what I can remember, when the fuel tank cap was opened this exposed a drain hole at the base of the recess. Connected underneath was a length of about1/2 inch dia rubber hose. I seem to recall that the fuel tank also had an overflow drain off the top of the tank, once again with a length of 1/2 inch hose. These two lengths of hose connected to a "Y" pipe with another length of hose leading to the ground somewhere. Why do I mention this you might ask. Well, I ended up with half a tank of water because the very end of the hose was bunged up with mud. Water had drained down from the fuel filler scupper to the Y pipe then back up into the tank via the Y junction and through the overflow pipe. There you are just a passing thought

[RichardSEL]

And what a welcome passing thought it was... I've just had the tanks restored. One was leaking, the other fine. One had a duff fuel gauge sender, the other was alright. So the repaired one I had pressure tested too. Apparently that's a requirment nowadays?
The tanks aren't back in the car yet. So I'll make sure the drains are correctly connected per your post.

This is the parts book plate 61 but at the max 600 pixels width allowed for posting in thread
Are the breather tubes you refer to the loose ones at the top of each tank in the pix?

I don't know whether both pumps are still there. In the parts bin there was just the solenoid of one which had been unscrewed from its pump part. So guess at least one will have to be renewed (£88.33 from Manners)

The 4.2L is of the twin carb type like XJ6 -- in my naivity I assumed what I was buying was an early XJ6 (like series 1) engine in it. Not 420G. Oh well

What does foul on mine is the 420G's air filter which will be too proud to allow closure of the bonnet. So that'll have to be replaced with twin pancakes (SC Parts do them at £22 ea)

[oldtimer]

Richard,
The Y pipe, item 11 on the exploded parts diagram is certainly the offending item to which I referred. You might like to consider running two hoses all the way to the bottom and deleting the Y pipe altogether. That would remove the risk of the problem I had. Yes and the hoses at the top of the drawing are the ones to which I referred.

I would like to refer you to Burlim Fuel Stems, Spitfire House for SU parts , if you ask I'll dig out their Telephone number for you.

I loved my old MK 7M, please keep us up to date with progress

PS I recon if I dredged through all my old storage boxes I could come across some Mk 7 oddments --- please don't ask what!

[davidr]

Burley Fuel Systems are in Salisbury and they have taken on the SU parts supply. I think they even make them now.
Their number is 01722 412500. Website www.burlen.co.uk

They are only a couple of miles away from me so if you want anything checked out in person let me know.