Wow, that's pretty nasty!
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| Fuel Pipes https://forums.tipec.net/viewtopic.php?f=25&t=1072 |
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| Author: | Gazza944 [ Sat Apr 26, 2008 3:41 pm ] |
| Post subject: | Fuel Pipes |
Well after depositing a large amount of fuel on my garage floor its time to sort my coording pipes. We got some 10mm copper pipe but have only been able to get hold of an imperial flaring kit which we cannot get to attach. I need to replace the section between the rubber pipe at the back and about level with the drivers door. Can anyone offer suggestions? |
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| Author: | Siggy [ Sat Apr 26, 2008 10:11 pm ] |
| Post subject: | Re: Fuel Pipes |
If your using copper pipe. It needs to be well insulated from the body and must not touch metal anywhere. Copper work hardens and will crack very quickly. Unless its one of the 'kunifer' type mixtures |
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| Author: | nags [ Sun Apr 27, 2008 12:06 am ] |
| Post subject: | Re: Fuel Pipes |
Gazza, I've just had my turbo in the workshop where they noticed a slow drip from a (partly rusty) fuel line. This was obviously an unexpected issue for me, even more so when the replacements are over £300 from Porsche and then a similar amount in labour to replace. The alternative suggested by my mechanic was Pirtec hoses, which I have opted for. Not sure of the merits of copper pipe. |
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| Author: | Gazza944 [ Sun Apr 27, 2008 6:46 am ] |
| Post subject: | Re: Fuel Pipes |
nags wrote: Gazza, I've just had my turbo in the workshop where they noticed a slow drip from a (partly rusty) fuel line. This was obviously an unexpected issue for me, even more so when the replacements are over £300 from Porsche and then a similar amount in labour to replace. The alternative suggested by my mechanic was Pirtec hoses, which I have opted for. Not sure of the merits of copper pipe. Hi - Where did you get the Pirtec onces from? Is 10mm the actual diameter of the Porche pipe or is there and imperial measurement? |
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| Author: | Porsche [ Sun Apr 27, 2008 8:59 am ] |
| Post subject: | Re: Fuel Pipes |
Siggy wrote: If your using copper pipe. It needs to be well insulated from the body and must not touch metal anywhere. Why? |
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| Author: | ExAudiSi [ Sun Apr 27, 2008 9:24 am ] |
| Post subject: | Re: Fuel Pipes |
Porsche wrote: Siggy wrote: If your using copper pipe. It needs to be well insulated from the body and must not touch metal anywhere. Why? Because if you have different metals in electrical contact with each other in a damp environment you get electrolytic corrosion. |
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| Author: | ExAudiSi [ Sun Apr 27, 2008 9:26 am ] |
| Post subject: | Re: Fuel Pipes |
nags wrote: Gazza, I've just had my turbo in the workshop where they noticed a slow drip from a (partly rusty) fuel line. This was obviously an unexpected issue for me, even more so when the replacements are over £300 from Porsche and then a similar amount in labour to replace. The alternative suggested by my mechanic was Pirtec hoses, which I have opted for. Not sure of the merits of copper pipe. Are you sure that £300 doesn't include labour? I have just priced up the fuel pipes for my 968 and the supply and return pipes are less than £40 each from my local OPC. |
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| Author: | Gazza944 [ Sun Apr 27, 2008 10:43 am ] |
| Post subject: | Re: Fuel Pipes |
Here are a couple of pictures of the nastyness. |
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| Author: | ExAudiSi [ Sun Apr 27, 2008 11:24 am ] |
| Post subject: | Re: Fuel Pipes |
| Wow, that's pretty nasty!
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| Author: | Porsche [ Sun Apr 27, 2008 1:33 pm ] |
| Post subject: | Re: Fuel Pipes |
ExAudiSi wrote: Because if you have different metals in electrical contact with each other in a damp environment you get electrolytic corrosion. Forgive me if I'm being a bit thick, but why have the fuel pipes got electric running through them? Just for the record, I'm not being awkward. I just wanna know, because I replaced my fuel pipes with copper about 5 years ago and none of the garages I've took it to since have mentioned anything about this problem. |
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| Author: | Siggy [ Sun Apr 27, 2008 2:26 pm ] |
| Post subject: | Re: Fuel Pipes |
Porsche wrote: Siggy wrote: If your using copper pipe. It needs to be well insulated from the body and must not touch metal anywhere. Why? Copper Work hardens, which means any vibrations will weaken it until it cracks/snaps Many years ago one car manufacturer (OK it was Moskivich) thought it was a good idea to have copper brake pipes, great no more rust. BUT garages in the UK were not used to them and often the pipes would get moved and end up touching each other or the body in no time at all the failed. The factory had them rubber mounted to the body. As long aS THEY NEVER TOUCHED ANYTHING THEY WERE GREAT |
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| Author: | Porsche [ Sun Apr 27, 2008 4:12 pm ] |
| Post subject: | Re: Fuel Pipes |
Okay, now I understand. There's lots of plastic brackets holding the 944 S2's fuel pipes in place, so I wouldn't think they will move much, if at all. Like I said I've had mine done for about five years now and haven't noticed any problems. |
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| Author: | Siggy [ Sun Apr 27, 2008 4:15 pm ] |
| Post subject: | Re: Fuel Pipes |
It might be that they are not copper but a copper ???? mix |
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| Author: | ExAudiSi [ Sun Apr 27, 2008 4:25 pm ] |
| Post subject: | Re: Fuel Pipes |
Porsche wrote: ExAudiSi wrote: Because if you have different metals in electrical contact with each other in a damp environment you get electrolytic corrosion. Forgive me if I'm being a bit thick, but why have the fuel pipes got electric running through them? Just for the record, I'm not being awkward. I just wanna know, because I replaced my fuel pipes with copper about 5 years ago and none of the garages I've took it to since have mentioned anything about this problem. The only electricity in the fuel pipes is caused by the static generated by the movement of the fuel and is a different issue to this one. What I was refering to as electrolytic corrosion is caused by the presence of two unlike metals having an electrolyte (moisture) between them. This is the same way that batteries work, only obviusly not as powerful. It is the same principal as the blocks of zinc which used to be attached to the keels of iron ships so that the zinc would corrode in preference to the iron of the ship. If you will excuse the pun, I'm a bit "rusty" on this subject but I think this is how it works. This is in addition to the work hardening which Dave was refering to. |
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| Author: | PaulSmith [ Sun Apr 27, 2008 6:53 pm ] |
| Post subject: | Re: Fuel Pipes |
nags wrote: when the replacements are over £300 from Porsche and then a similar amount in labour to replace. Just checked my invoice from Promax who replaced my full set two years ago and the total price for the oficial Porsche pipes was £180 plus 6 hours labour to fit (and then forget about for the next 17 years  )
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