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XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Fuel line refresh

 
  #1  
Old 02-24-2019, 10:44 AM
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Default Fuel line refresh




This week I am giving some more love to the XJS by replacing thermostats and adding a fuel check valve. so I am beginning to think about next steps...

For my 92 v12 (has the 6.0 fuel delivery system) the flexible fuel lines could use some attention. The pieces that look concerning are the two crossover lines from fuel rail A to fuel rail B and also the first (last) section of hose on the fuel feed line. These three sections are of the same material and while they do not leak they appear very dry and brittle on the outside layer. Where the check valve is going on the fuel feed line, the tubing has been cut and spliced for the purpose of getting a fuel pressure reading in the past. So that is where the check valve will go. As I said, this line is brittle on the outside but holds fuel but Iím not comfortable with the outer layer. The design of the hose must rely on this layer for heat protection or abrasion protection but evidently not for sealing fluid.

I am am looking for how to have these three sections replaced, one of which I want my check valve in line.
 
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Old 02-24-2019, 11:31 AM
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Do not drive this car until these hoses have been replaced.
 
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Old 02-24-2019, 01:55 PM
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Thank you for the emphasis on safety, Greg. I donít want to argue about that here. Iím looking for a solution and really unsure how these can be replaced.
Greg in Miami
 
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Old 02-24-2019, 01:56 PM
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Originally Posted by gccch View Post


I am am looking for how to have these three sections replaced, one of which I want my check valve in line.
The hoses are press-fit onto barbed nipples.

Carefully slice off the old hoses. Make every effort to avoid damaging the nipples. If you're really careful and patient you can probably save the existing ferrules but I just cut the old ones off and install new

Anyhow, the new hose is simply pressed onto the nipples with hand pressure.

That's it.

I use a small smear of silicone (or whatever slippery stuff is closest to hand) to ease the pressing-on

New ferrules are available from various vendors




Cheers
DD


 
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Old 02-24-2019, 02:54 PM
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The visual version of what Doug says. The important part is not to damage the barbs when you remove the old hoses.

 
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Old 02-24-2019, 03:29 PM
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I have replaced those rail crossover hoses on a 92 XJS before and Doug and Leo are spot on with their advice. Lots of patience to cut away the old hose without damaging the barbs underneath. I was able to reuse the original ferrules. I don't know where you're located, but I have a rebuilt set of feed and return hoses for the 5.3L facelift XJS that I never used, EBC4363 and EBC4364, if you're interested. I gave up waiting on a vendor to send them back to me and they arrived a week after I had installed new hoses.
 
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Old 02-24-2019, 08:46 PM
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Originally Posted by XJ6Paul View Post
I have replaced those rail crossover hoses on a 92 XJS before and Doug and Leo are spot on with their advice. Lots of patience to cut away the old hose without damaging the barbs underneath. I was able to reuse the original ferrules. I don't know where you're located, but I have a rebuilt set of feed and return hoses for the 5.3L facelift XJS that I never used, EBC4363 and EBC4364, if you're interested. I gave up waiting on a vendor to send them back to me and they arrived a week after I had installed new hoses.
Paul, I am interested will send a PM.

The pics and videos are of slightly different hoses. From other models, I guess. Looks simple enough. Anyone know the ID of the tubing I should use? I need to make this error free as I do rely on this car at the moment. As much as that is possible. Haha.

Also, it looks as though thereís are two styles of ferrule. Also looks to be a rather insignificant detail in the smaller ferrule type (which I have). Is this specialty tubing or will any fuel line suffice? Iím guessing it needs to be a high pressure hose???

 

Last edited by gccch; 02-24-2019 at 08:53 PM.
  #8  
Old 02-24-2019, 09:06 PM
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I've used the smaller. shallower ferrules to replace the deeper ferrules many times with no problems. The shallow type is readily available but I'm sure the deeper ferrules are out there somewhere as well....with a bit of looking.

You'll want 'fuel injection' rated fuel hose. It'll usually say "For fuel injection" or similar right on the hose. Beyond that, nothing exotic is needed. Most parts stores sell gates, Goodyear, or Dayco. Any of those will be fine. Avoid the Goodyear hose with the blue inner liner....if it is still even being sold. The older v12s use 5/16th inch ID hose. I suspect your '92 does as well but I can't say for sure

Cheers
DD
 
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Old 02-24-2019, 09:23 PM
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Doug has pretty well covered it but the deeper ferrules, at least here are generally available from farm equipment/ tractor type outlets.
 
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Old 02-25-2019, 02:18 AM
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Why bother with ferrules? Is there an engineering reason or something? You can get heavy-duty worm drive clamps and redo every fuel hose with that, makes for easier disassembly though not as pretty visually.

You *can* buy covers for this style of clamp but its abit much.

 
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Old 02-25-2019, 05:41 AM
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The old hoses are easy to remove by using a soldering iron to cut through the old pipe. It's very quick, and no risk of damaging the barbs. I've just done the two hoses in your first pictures (between the two injector rails) and will be tacking the others shortly.
 
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Old 02-25-2019, 05:42 AM
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Originally Posted by VancouverXJ6 View Post
Why bother with ferrules? Is there an engineering reason or something? You can get heavy-duty worm drive clamps and redo every fuel hose with that, makes for easier disassembly though not as pretty visually.

You *can* buy covers for this style of clamp but its abit much.
It bothers me more than others but next time you have one of the push on fittings apart run your finger over the barbs. Clamping a high pressure fuel hose down on such a sharp edge is just another gamble.
 
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Old 02-26-2019, 06:21 AM
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I'm actually curious about why the ferrules are there at all - what do they do?
 
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Old 02-26-2019, 06:48 AM
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Originally Posted by bladerunner919 View Post
I'm actually curious about why the ferrules are there at all - what do they do?
In my opinion they are just finishers. They hide the end of the hose and make things look right.

Leo
 
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Old 02-26-2019, 07:29 AM
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The idea of the ferrules is to preserve the end of the hose. If left unprotected the layers of the hoses might....probably would, eventually....deteriorate and the integrity of the connection would be lost.

I know some have not used ferrules and reported no problems, at least in the short term.

IMO, they might not be 100% essential....but I can see no compelling reason to avoid using them.

Cheers
DD
 
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Old 02-26-2019, 11:02 AM
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Constraining the end of the hose is what the ferrules are supposed to do. They compress the end only, preventing the hose from moving up the barbs without pressing the hose into the barbs. Just try removing a hose from an injector with the ferrule in place, then again without the ferrule. Youíll see their function.
 
  #17  
Old 02-27-2019, 09:33 PM
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Today I replaced the splice with a check valve and have three for three quick starts without having to “prime” my fuel system. I am super pleased so far with the check valve solution.

However, I found the seal going from the feed line into the fuel rail has totally failed. I replaced with an o ring but this is not an acceptable solution. I have heard these seals are difficult to find for the 92-96 fuel rail system.

Anyone know now where I can find this seal? It looks like it was a custom shaped seal for this fuel line.
 
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  #18  
Old 02-28-2019, 01:57 AM
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Try Mr Injector. https://mrinjectoruk.co.uk/
 
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Old 02-28-2019, 12:33 PM
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S
Originally Posted by Greg in France View Post
Thank you Greg. Unfortunately what I have found is this particular seal has been discontinued. Several calls to Jaguar specialist suppliers yielded the same answer.

So, for those of us with the late model (92-96) fuel injector rail we have no supply of the original seal.

Has as anyone solves this another way? I had a standard o-ring on hand and it has held for one day but it is now my biggest concern, more than the hoses which we all agree need to be replaced.

Please help if you have the exact solution!!
 

Last edited by gccch; 02-28-2019 at 01:16 PM.
  #20  
Old 02-28-2019, 01:44 PM
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Did you try https://www.jaguarfuelinjectorservice.com

and what is the part # your looking for?

Edit:

Is it the oring listed here for less then a dollar?
 

Last edited by VancouverXJ6; 02-28-2019 at 01:53 PM.

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