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Replacing a cracked/split injecter hose
#1
Hi,

I noticed this weekend that one of the hoses from the distributer to the injector was cracked/split for about 5 inches, so I want to replace that rather sharpish. The ones in my car are black rubber and just slide onto the fittings at either end (there are no clamps holding them on). They don't look OEM, and seem to have been replaced with something generic in the past.

Can I replace the hose with a suitable length of generic "High pressure fuel injection hose" cut to the right length? Ed just seems to have the stainless steel ones available now rather than OEM ones, which I don't really like the look (or price!) of.

I'm thinking something like this: http://www.ebay.co.uk/itm/FSE-8mm-Bore- ... 1122377293

If so, is an internal bore of 6mm or 8 mm suitable? The outer hose diameter is about 11mm on my car.

Thanks,
Simon
Simon Brewer,
DOC Member #517
VIN #4748
http://www.creatingwithlight.co.uk
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#2
I really would not risk anything other than the proper fuel pipes on any injection system. Are you talking about the rubber pipe that goes over an inner plastic core? If so the outer just protects the inner bit anyway so unless it's leaking there should be no issue. It's a good idea to get all these changed to S/Steel improved ones with crimped ends. Ed does them as do DPI and SpecialT auto.
Chris
Membership Secretary DOC UK
2021's DeLorean event: http://www.deloreans.co.uk/forum/showthr...p?tid=6056
VIN#15768 Ex VIN#4584
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#3
Quote:Can I replace the hose with a suitable length of generic "High pressure fuel injection hose" cut to the right length?

No, no, and thrice no.

As Chris said, the hose is a thermoplastic core which is press fitted onto the banjo fittings. The outer rubber is just for protection.

Quote:Ed does them as do DPI and SpecialT auto.

And Martin G, though I have no practical experience of any after market hoses myself.
Richard H. DOC 365 VIN 1274
http://www.deloreans.co.uk
In theory, theory and practice are the same. In practice, they are not.
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#4
Hmmm.. ok. A new set of SS hoses its going to have to be then! At least I now know that they have a plastic core, so hopefully its only the outer rubber which has perished.

(For reference, the ones on my car don't have crimped ends, and appear to just be slid onto the fittings from the distributer.)
Simon Brewer,
DOC Member #517
VIN #4748
http://www.creatingwithlight.co.uk
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#5
Yep that's right sort of heat shrunk onto the fittings.
Quote:And Martin G, though I have no practical experience of any after market hoses myself.
Ahh yes forgot, I'm sure there are others as well if you have a preference.
Chris
Membership Secretary DOC UK
2021's DeLorean event: http://www.deloreans.co.uk/forum/showthr...p?tid=6056
VIN#15768 Ex VIN#4584
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#6
frostrobo Wrote:Hmmm.. ok. A new set of SS hoses its going to have to be then! At least I now know that they have a plastic core, so hopefully its only the outer rubber which has perished.

(For reference, the ones on my car don't have crimped ends, and appear to just be slid onto the fittings from the distributer.)

It's probably just the outer rubber which has perished, the inner hard plastic core is far more durable.

The DeLoreans injection system is pretty high pressure and you must have the correct hoses with the correct moulded ends this is one part of the engine which you really need to approach with caution or you can be in a lot of trouble!

Not to mention that using the wrong hoses which may balloon under pressure can cause problems with the opening pressures on the injectors causing additional running issues.

Buy from a reputable vendor.

J
www.classicdelorean.com
Colchester - Essex - UK
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#7
Simon, you have original hoses.

As others have said, you can't just use any fuel injector hose (ironically) on the injectors because they can cause the injectors to pulse at low demand. The hoses I sell are a high pressure semi-rigid thermoplastic that is the right diameter, the right colour (albeit shiny), and doesn't require that you send back the old ends.
Martin Gutkowski
DeLorean Cars
http://www.delorean.co.uk
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#8
I've just received a set of Martins fuel lines in the past week or so. I've still to fit them to the car. They look very nice indeed. Like you, I am put off by the appearance of the stainless braided ones, so for the money and more natural stock appearance, it was a no brainer for me to go with Martin's hose kit. He's got lots of tried and tested experience on the engine side, and he's cheaper than Ed etc too.

Each to their own of course.
Rissy
Chris M. Morionem qui loquitur multus sine cogitatione.
(Forum Member 288)
(DOC Member 663)

May 1981 vin#1458
"LEX" aka "Wonkey" - Officially used in Britain's Greatest Machines (80's episode) with Chris Barrie.
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#9
Quote:Each to their own of course.
Indeed Martins do look 'probably' the closest to stock. I like the look of the S/Steel ones myself and have fitted lots of SpecialT's sets either to my own cars or helping other people out. Again though it's as you say done to how you like them to look, I like the S/Steel versions! Either way I'm sure all are better than 30+ yr old ones.
Chris
Membership Secretary DOC UK
2021's DeLorean event: http://www.deloreans.co.uk/forum/showthr...p?tid=6056
VIN#15768 Ex VIN#4584
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#10
Personally I too like the look of the stainless steel ones…..and they don't start dripping if you accidentally catch them….as I've had with some original one's.

I've have several sets from Julian…Bandit over the years and never had a problem with them.
Chris Parnham

Factory Used RHD Auto. AXI 1699

(currently for sale)  



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