I would recommend very strongly against using 5/16in hose. While
5/16" is very close to 8mm, the "8mm" fuel hose used by European car
manufacturers actually has in inner diameter of 7.5mm. I have no
idea why this is, but I have seen 5/16in hose leak around the barbs
when used as a substitute.
-Joe
At 10:52 PM +0000 11/2/10, alfa-digest wrote:
Date: Mon, 1 Nov 2010 10:44:31 -0600
From: "Richard C. Wagner" <[email protected]>
Subject: [alfa] Re: '88 Quad Questions
Biba:
Fuel rail: I've not paid attention to the past discussions
regarding replacing the fuel hoses. I recall something about
barbs and that there is a very specific size of hose to use,
but... Can someone enlighten me what is involved?
The injectors are connected to the fuel rail with 8 mm fuel injection hose.
Most auto stores carry 5/16" which is very close and can be substituted.
I've found the 8 mm hose to be slightly easier to put on. Use ONLY fuel
injection hose, not regular fuel hose. The hoses are retained on the rail
and injector nipples by tapered barbs. The only way to remove the hoses is
to cut them. Make a slice lengthwise along the mounted section of hose and
you should be able to pull it off. Cut new hoses using the old ones as a
gauge for length. Then, placing the metal ring over the nipple first, press
the new piece of hose onto its nipple. This will take a good deal of force,
and may even leave your palm bruised. Make sure the hose is seated all the
way down, against the ring. Install the hoses dry. Use no lubricant or
gas. And make sure you orient each injector correctly as you attach it to
the rail.
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