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Fuel Hose

 
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Wed Nov 16, 2005 5:58 pm    Post subject: Fuel Hose Reply with quote

Hi,

This is the fuel hose from the outlet of the electric fuel pump that connects to the nylon pipe to the engine.

It was installed a couple of months ago and today I discoverd fuel leaking from it.

Is is possible unleaded fuel to ruin rubber hoses? Strange enough this hose is intended for fuel;

Any opinion?

Regards


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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

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tvatavuk
Gold Cloverleaf


Joined: 13 Mar 2003
Posts: 673
Location: Split, Croatia

PostPosted: Wed Nov 16, 2005 9:04 pm    Post subject: Reply with quote

Unleaded fuel will eat away all rubber hoses for leaded fuel, usually non i.e. one.
So when changing be sure to change it with fuel hose for unleaded and probably high preassure one.
And yes it's hard to buy fuel hose that is any good, I changed twice hose that connects fuel evapor catch can with tank, each started to leak after only 1-2 week, and it was for high preassue, unleaded type.
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Little black dress which replaced Alfa Romeo 33 S 16v Permanent 4 GMo
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Wed Nov 16, 2005 9:18 pm    Post subject: Reply with quote

Hi,

I had this hose replaced by a non cloth covered fuel hose which simply states "Tubo carburante" but nothing refers to unleaded or not.

In addition I have installed two pieces of hoses of the cloth type (like the one in the photo) in the engine bay. One to the pulsation damper and the other from the damper to the manifold itself. However no signs of wear or leaking so far which are more than a year installed. Strange ...

Anyway, time will tell !

Regards
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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
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Admin
Site Admin


Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK

PostPosted: Thu Nov 17, 2005 12:35 am    Post subject: Reply with quote

Hi

Was it hose intended for fuel injection. Big difference in the pressure requirement for a fuel injection system.

All the best

Keith
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ZeNiTh-PbArM
Alfa 33


Joined: 14 Mar 2003
Posts: 388
Location: Paris, France

PostPosted: Thu Nov 17, 2005 7:43 am    Post subject: Reply with quote

Hi,

by the way, has anybody heard of the metal fuel lines under the car (fitted on series II, the series III had plastic lines) corroding?
i have seen two 1.7QV 33's developed a leak last month, the lines were so rusty they literally desintegrated upon removal.

regards,
zp
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Thu Nov 17, 2005 9:16 am    Post subject: Reply with quote

Hi,

Don't know if the hose was intented for Fuel injection.

I was searching for cloth covered hose which I found at a Shell gas station. The guy there didn't seem to know much about cars since he was telling that this hose is for the cooling system and the next moment said this can be fitted to the fuel system also Rolling Eyes Laughing He was one of the undecided ones Exclamation

However I compared the new hose to the old one, same diameter, same material, same to everything so I bought it - now you can see the results.
Such thing has happened twice in the outlet of the fuel pump within a year or more.

Going to check at a specialised shop I have in mind to clarify things.

Regards
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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
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tvatavuk
Gold Cloverleaf


Joined: 13 Mar 2003
Posts: 673
Location: Split, Croatia

PostPosted: Thu Nov 17, 2005 11:26 am    Post subject: Reply with quote

As I said eralier, usual fuel hoses just rotten away when you use unleaded petrol, don't know which substance does it but it happens.
Few chaps I know started using unleaded in their leaded Alfas and it happened to them (so no high preasure there) replaced with aftermarket ones non injection, same thing again.
Pressure only makes things much worse ad dangerous, as Keith stated if you use low pressure rubber on place where is high pressure, expect trouble.
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Tino Vatavuk
Little black dress which replaced Alfa Romeo 33 S 16v Permanent 4 GMo
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RFlower
Alfa 33


Joined: 17 Feb 2004
Posts: 432
Location: S of France

PostPosted: Thu Nov 17, 2005 9:09 pm    Post subject: Reply with quote

That hose in the photo looks like it may have been old stock. Rubber deteriorates whether it's used or not, especially if not stored in a cool place.
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Thu Nov 17, 2005 9:29 pm    Post subject: Reply with quote

Hi,

Actually these cracks shown in the hose,were created within a couple of months. I had a metre of that hose and carefully cut it with a blade cutter.

The rubber looked fresh and flexible ... now it is as bad as you can see it.

Regards
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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
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icky
Alfasud


Joined: 20 Mar 2003
Posts: 70
Location: Lismore NSW Australia

PostPosted: Thu Nov 17, 2005 10:32 pm    Post subject: Reply with quote

Hi,

I know that the aromatics that they put into unleaded petrol is a strong solvent that will eat away at various types of rubber. They had that problem in NZ when they introduced unleaded and some old cars were catching on fire due to the carb O rings deteriorating and the fuel lines leaking. Crying or Very sad
So if you are replacing fuel lines always ask/check that they are compatible with unleaded petrol,

If your fuel line is this bad, it might pay to check the carb/injector O rings and anything else made from rubber that comes in contact with petrol.
These may be deteriorated or swollen.

Cheers
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Thu Nov 17, 2005 11:29 pm    Post subject: Reply with quote

Hi,

Thanks for the input guys, very helpful. The injector O-rings were replaced when I cleaned the injectors last May.

Bought them from my AR dealer original in their package 8 pieces. I don't think that these may be out of specification for unleaded. I hope so at least.

Regards
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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
Parts Shop: www.alfa-restoration.co.uk/shop
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Bellamachinna
Alfa 33


Joined: 12 May 2003
Posts: 352
Location: Lisbon-Portugal

PostPosted: Fri Nov 18, 2005 8:52 pm    Post subject: Reply with quote

ZeNiTh-PbArM wrote:
Hi,

by the way, has anybody heard of the metal fuel lines under the car (fitted on series II, the series III had plastic lines) corroding?


Strange...
My Series 3 has them in metal...

regards
P.Camilo
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gritsop
Green Cloverleaf


Joined: 23 Apr 2003
Posts: 766
Location: Ekali, Athens - Greece

PostPosted: Sun Dec 18, 2005 9:36 am    Post subject: Reply with quote

Hi,

Had a look underneath the car as I had a strong fuel smell.

Look what I found



The hose is completely wet as you can see. After removing it there were a lot of longitudinal cracks throughout the length of the hose. In addition I felt like rubber was melted in some parts of the hose.

I have now replaced it with a high pressure hose and I'm convinced that the old hose was not intended for unleaded. Even if it was old stock, fuel wouldn't do to my opinion such a mess. It is just not intended for unleaded.

You always learn with cars ...

Regards
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Thanassis Gritsopoulos
1991 Alfa 33 1.4 IE
2001 Alfa 147 1.6 Distinctive

http://www.alfa-restoration.co.uk
Parts Shop: www.alfa-restoration.co.uk/shop
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paddy granger
Alfa Sprint


Joined: 12 Aug 2003
Posts: 248

PostPosted: Sun Dec 18, 2005 4:11 pm    Post subject: Reply with quote

I'm going to check my hose now Shocked
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RFlower
Alfa 33


Joined: 17 Feb 2004
Posts: 432
Location: S of France

PostPosted: Sun Jan 01, 2006 1:55 pm    Post subject: Reply with quote

This link may be of use. http://www.athon-motorsport.co.uk/earls300hoses.html

Also, Gritsop, the hose in your picture is bent in a rather tight radius, would be better with a more gentle bend if possible.

Happy Yew Near to all
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Dick Flower, Nr. Carcassonne. '94 Trofeo 1.4 ie (F), '93 Imola 1.3/1.4 ie (now for breaking) (F), '91 1.7 ie (GB)(spare car), '86 Sprint 1.5 QV (F). '87 VW Syncro camper (F), '73 NSU Ro80 (F), '99 Fiat Seicento (F)
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