Hey all,Im replacing the fuel hoses on the square today I ordered a load of the nice german braided stuff for the job.
One question.
Should the hose from the car body to the engine bay a different kind of hose?
Mine seems to be a bigger diameter and also is a hard hose instead of the flexible braided stuff.
I have some new braided brake line hose left (used under hood from res. to hard brake lines), would I be able to use that as its a bigger diameter? Or
would it rot or cause damage?
Or should I be replacing like with like solid hose?
Might be a stupid thing to ask, but Im curious.
Thanks in advance
Brake hose and fuel hose are different. You must use the right hose for the right application. Correct type, pressure rating and size.
I gathered as much, just wondered if they were technically the same thing, must both be pretty resistant.
But yeah, I wouldnt have just stuck it in there.
Bugger, gotta go find more hose then, grrr....
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Brake hose is tested to comply with ADR7 and pressure rated to 20.000kpa (3000psi)
Fuel hose will only see maybe 4psi for a stock carburetted vehicle
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Yeah, tell me about it.
Thanks guys, I was just curious really.
Looks like the hose running from the pan to the engine bay is a different diameter, so even if I could use the cloth braided I have, it seems too
small.
Lee, the hose I took out from under there is a solid kind of hose. Seen here... its the pipe with the short length of metal pipe in the middle of it,
may have been there to stop the hose being cut by the tinware, but it doesn't seem to be in the right place.
Damn, I need to buy a jetwash for under there!
So cloth braided is ok for replacing that section?
Yes
the cloth braided is OK..
that pipe "joiner" ?? must be an in between size on the outside diameter...
and two pieces of different sized hose on it... ??
or have they put some PVC hard hose over the pipe??
to stop it chaffing on the metal hole??
that is a good idea...
there should be a rubber grommet in all holes but they get hard and fall out..
cheers
LEE
Hmm, mystery then.
Pipe is same diameter both sides of the metal section.
Thats the only section of metal, the rest is just rubber.
There is a rubber grommet, it needs replacing, maybe repco might have some. But thats what I thought it might be, to stop the chaffing, but its in the
wrong place.
Oh well, off to repco and supacheap tomorrow to see if they have the right hose.
I have loads, but this last section seems to be the wrong diameter, would it hurt to heat it in water and stretch ir over the metal pipe on the body?
I mean, both in terms of damaging the hose and also fuel supply to the engine? Its a standard 1600, no mods.
I wonder if someone has just used that to cut the old hose at some stage in order to replace a part, but not all, of it? Of course that would be a silly thing to do, but stranger things. . .
Can't see rubber hose getting softer by putting it in hot water, works with the clear plastic type but not rubber, if the rubber wont stretch enough
to go over the metal pipe then it's just not going to work, try lubricating it first, works for me but I'm a dead set ameture.
Warning - you can't use brake line as fuel line or vice versa! Even on the low pressure side of the master cylinder. Petrol will soften the rubber that is designed for brake line. You can see what will happen if you put a brake wheel cylinder cup seal in petrol - within a day it double in size.
But will the smaller diameter of the new fuel line I have affect the running of this bog standard engine?
Cheers
2 words Metric Imperial
Looks like a filter was probably fitted there, but replaced with a piece of tube.
Thats the location I have always put filters, as its not under pump pressure, or in the engine bay.
Ideally you should contact one of the VW parts suppliers, and buy a length of the braided 5mm fuel line. You can use 5mm rubber line from a regular
auto parts supplier, but I prefer the original braided stuff.
Get the right line for the job, not worth messing about with fuel systems.
Where ever you got the brake fluid hose should have the correct fuel line.
I have got the 5mm braided fuel line, as Ive been saying. My question was if this section was supposed to be a different size to the rest of is the
whole system run on 7mm pipe?
Doesnt matter, I got some 7mm from up the road and am fitting that now, will run the 5mm to the carbs.
Good idea about that fuel filter position, might just do that.
Cheers
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Yep, all done, put the filter in where the metal pipe was. Ran all the new pipes with new clamps.
Spit always works a treat.
Sooo close to starting her up again now, just a few things to go, its going to be good to hear here again.
Then its the brakes! Eeeek!
None of your system should be 7mm, unless your car was originally fuel injected???
thats the only reason you would have any 7mm pipe or fittings on your car.
sounds like you got it sorted anyway.
Yeah, that's the confusing thing, as far as I know its always been dual carb, but its all sorted now.
Prob someone patched it with whatever they had handy.
Thanks for the help chaps! 
Just as an aside then, if you are running a larger than stock engine, such as a 2litre (eg I'm putting in a 2276) should the fuel line from the tank be up-sized to 8mm instead of the 5mm?
I would depending on carbs
yeah, bigger engine, more fuel... larger pipes I would have thought.