Best strategy for replacing fuel hoses, and supplier

[deano]

Hi all,

I have been cleaning under the bum of my 73 MFI following engine drop, and currently disassembling the fuel pump (rear-mounted, behind rear left seat) and pipes to clean behind them. Luckily, almost all of the original underseal is still in great condition and will get a nice coat of Bilt Hamber Dynax UB wax after I've cleaned up and repaired any small bits...

I plan on replacing all the clip-on fuel hose sections, but need advice for the crimped-on hose sections please.

The two short crimped-on hard pipe sections (just under the fuel filter console) are a bit cruddy but perfectly reusable. Same for the crimped on 3-way fuel (return?) hose with the T connection.... I would ideally like to put nice shiny new crimped versions back on the car as per the originals, but they are insanely expensive or NLA.

Any suggestions for reasonably-priced replacements for the crimped sections?

Is it wise to do away with the crimped sections, or even bypass the short hard pipes, and just use normal hose and T pieces with jubilee clips?

Also, has anyone found a reasonably priced UK supplier of 7 x 12 (ID/OD) and 9 x 15 cloth braided hose and the various diameters of clear fuel tank breather hoses?

Would be grateful for any recommendations or advice on this!

Interestingly, there is an inline fuel filter in the return line....

[deano]

Few more pics...

This stuff looks OK for the clip-on hose sections, I think https://www.merlinmotorsport.co.uk/p/co ... metre-2122 ....

[Ian Comerford]

I replaced my fuel hoses with a kit from the States which wasn’t cheap and didn’t fit very well. In retrospect I would have removed all of the hoses and taken them to a hydraulic hose company to ask for a new set in ethanol resistant hose. The company that altered a couple of the new hoses for me reckoned they could do a set for less than half what I paid. The company was A1 Hydraulics. Very good and very fair pricing.

[deano]

Worth a look, thanks for the tip Ian !

[inaglasshouse]

Relevant thread here:
https://www.ddk-online.com/phpBB2/viewtopic.php?t=66052

[deano]

Thanks all - any tips on the crimped-on sections?

[rhd racer]

I replaced my fuel hoses with a kit from the States which wasn’t cheap and didn’t fit very well. In retrospect I would have removed all of the hoses and taken them to a hydraulic hose company to ask for a new set in ethanol resistant hose. The company that altered a couple of the new hoses for me reckoned they could do a set for less than half what I paid. The company was A1 Hydraulics. Very good and very fair pricing.

+1

Pitted made all mine on the spot for the 914/6, and supplied adaptors for the pump (front) and filter (rear). The only issue to get around is that the made up hoses with crimped hydraulic unions were at big larger and more difficult to route than the sort you make up yourself, but I did not have to fight with the stainless overbraid so it was a price worth paying!

I can’t remember the cost, but they were a fraction of the £600 odd that it cost to do my 964 with OE lines...

[deano]

Didn't find Pitted, but it looks like there are plenty of hydraulic hose businesses out there.

Sounds like a plan - thanks for the tips guys, I'll start with t'hose...

[rhd racer]

Sorry - Pirtek!

Blooming technology that thinks it knows better than me. It changed it to Porter that time!!!

Bring bag pencil and paper, and a windy phone!

[hot66]

Pretty sure I got item 30 from Porsche for not too bad price.

The inline fuel filter isn’t stock

[rhd racer]

Mine was a 3.0 CIS from an SC so run a stock online filter. Actually, this was the bit that caused some head scratching from memory because the threads were unusual. No matter, whatever the set up, they are pretty creative at running adaptors to get from point A to point B. For the unusual stuff, they will either mate together several fittings if urgent, or get something in. Knowing if you want straights or 90s in advance will help.

[rhd racer]

Oh, and get yourself a couple of plugs / stop ends too. If you are ever doing some work on the pumps and need to disconnect, you can blank off the supply safely. Unlike a rubber fuel line, you can’t get the mole grips out to stop the supply!

HTH

Wayne

[deano]

Pretty sure I got item 30 from Porsche for not too bad price.

The inline fuel filter isn’t stock

I'll look into #30. I think the T pipe that I saw was about £160+VAT..

Interestingly, I think, that non-stock inline filter is on the return line. Perhaps, whoever installed it, didnt realise that it was the return, or maybe they did and had a cunning plan - what do you think?

[inaglasshouse]

Interestingly, I think, that non-stock inline filter is on the return line. Perhaps, whoever installed it, didnt realise that it was the return, or maybe they did and had a cunning plan - what do you think?

I think it's not a completely mad idea.
If I understand correctly the fuel is constantly recirculating tank -> main filter -> MFI -> tank, with the volume being pumped through always exceeding demand. So you can argue that quite a lot of fuel goes through that extra filter before being recycled back to the tank and later coming around again. Hence it's doing something useful.
With that said, of course the fuel all goes through the main filter each cycle, so I'm not sure there's much need for any kind of extra filter? Mucky fuel is not a problem I've personally experienced.

[deano]

Oh, and get yourself a couple of plugs / stop ends too. If you are ever doing some work on the pumps and need to disconnect, you can blank off the supply safely. Unlike a rubber fuel line, you can’t get the mole grips out to stop the supply!

HTH

Wayne

Thanks Wayne, I suppose I should be a little more professional, and safe, and dispense with the bits of tape over the ends of the hoses.

I did drain the fuel tank in-situ, but there is probably some fuel left in there... and drained the hoses. All the breather tubes are connected still, and vented to air.

Do you mean like this https://www.glencoeltd.co.uk/fuel-union ... -8mm-blue/

Or, https://www.ebay.co.uk/itm/STAINLESS-ST ... Sw~vpaEHRr

or is there something better that you could suggest?

Thank you!!