I have had this happen twice on my Chevrolet Camaro when I have used so called Earls or Goodrich type stainless steel covered hoses. I fitted a new clear petrol filter, and put the old stainless steel covered hose back on. Started the motored poped the bonnet and the petrol was gushing out of the bend in the fuel pipe. I would not have known this was happening as it was out of sight unless I had checked.
I was told when I bought this fuel hosethat it was ethanol proof from a trader at Kempton Park. I had some of the pipe that was Stainless Steel covered on my Nomads Amal carbs, and it started to really pour out of the fuel pipe. The rubber fuel pipe had cracks through out it length, so I changed them to a proper ethanol proof fuel pipes from AMC Classic Spares. I also doubt that ethanol per se is the problem and agree with you about Cleveland Discol although I'm too young to have used it, my father swore by it for his Nortons and Morris 8.
I always use proper black synthetic rubber fuel lines as there is no telling what's inside the braided stainless ones. For example:. Especially when used in OPE. E is hydroscopic and the moisture will corrode some metals especially zinc based carbs amal is one. E is nasty for variaties of plastics and rubbers.
However the word tygon represents only the PVC family made by saint-gobains, swiss owned company. They make many many many blends many of which are no good for E Tygon F is very good for E fuel. There are a few other blends but are much stiffer. According to the engineers I spoke to at St Gobains USA F blend is a dual layer of ethanol resistant liner with a cheaper outer cover that is NOT E resistant and makes it unsuitable for some OPE equipment, primarily where the line goes inside the tank.
There are plenty of fakes out there. About 25 years back my then 8 year old Vauxhall i fuel injected beast started leaking through all the high pressure fuel hoses.
They all had to be replaced. No ethanol was involved. Modern fuel injected cars run at high pressures so presumably any current fuel hose from a reputable dealer should be safe.
Whether that includes stand holders at autojumbles I don't know but I have my suspicions! Later and now older cars haven't yet given problems. IMO If persons recommend tygon without a formula or blend , then they have no credibility.
Dave Evans was, and certainly I am, perfectly capable of looking on the Saint Gobains site and determining which pipe is recommended for Ethanol adulterated fuel. Yes it is F The Norton Owners Club Limited. I wonder if the external pipe's purpose might be to deliver cool oil to both sides, as opposed to far side getting oil pre-heated by its transit from the other side?
I doubt that the cost of drilling the shafts exceeds that of the external piping. I'm working on an oil cooler for the rocker lines' oil alone. Joined Jan 20, Messages 7, Do the rocker shafts really need their own oil cooler?
Just asking. Further, the head, exhaust valve spring pockets especially, is a likely place where such damage occurs and where pre-cooling might be most helpful. As we know, oil temps at the tank are generally appropriate and usually need no reduction. Oil to the head, however, gets pre-heated as it enters the engine and then goes through compression heating at the oil pump before it goes up to one of the hottest parts of the engine.
Whether there is enough volume of oil being delivered by way of the rocker lines to effect any meaningful temperature reduction is the real question. And then, that assumes that timing chest pressure regulator will allow that greater flow. Last edited: Nov 1, Joined Oct 10, Messages Joined Jul 25, Messages 1, Simple solution is to use two double banjos then the LH one will take a length of quarter bore petrol pipe and you can then insert the narrower op gauge tubing inside with a smear of araldite to make it pressure tight ,optional is a small jubilee or similar clip but not really necessary.
Smiths gauges are available in the UK.. Tornado said:. I did the same thing in when I rebuilt my commando. Although it was in storage for many years, the lines are still working fine and have not cracked or broke after running this summer, but I think I will replace them next spring. If you slightly heat the end it will slide right on and conform to the banjo nipple when it cools, I did use small hose clamps just in case. You must log in or register to reply here.
Similar threads. Replies 4 Views 1, Nov 17, fireflake. Yorkie Aug 3, Norton Commando Motorcycles. Replies 5 Views Aug 3, L. Atlas rocker oil feed line. Replies 27 Views 2, Apr 3, Bernhard. Rocker box oil feed banjo leak. I think that the wire cutters referred to seem to have too small a jaw opening to cut straight through oil lines.
The Norton Owners Club Limited. Registered in England No. VAT Reg No Norton Owners Club. Search Search. User account menu Log in. Stainless braided oil lines. May sound stupid but how to cut these cleanly? Log in to post comments. The braid will open up when… The braid will open up when cut. I second that about wrapping… I second that about wrapping the hose tightly with the likes of insulating tape where you wish to cut. I use a Dremel Braided lines Think I'll try a dremmel.
A very long time since I've… A very long time since I've tackled this sort of job, but my memory is that a hacksaw will work provided that one firmly tapes round the site of the cut and saws through the tape.
0コメント