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Fuel Leak HELP!!!!!
https://forums.tipec.net/viewtopic.php?f=25&t=17141		 Page 1 of 2
Author:  Jamie P [ Fri Feb 28, 2014 5:35 pm ]
Post subject:  Fuel Leak HELP!!!!!
Panicking a little here....


I brimmed my car on thursday night and parked it up, my girlfriend said she could smell fuel so I've been for a look.

I've removed the offside rear wheel and can see fuel pipe has corroded where it is clamped to the body behind the rear shock just nr the unions to the flexipipes.

As the fuel is constantly dripping out I need to drain the fuel, what is the best way to do this?

As for repairing it I'll think about that once I've made it safe


Thanks in advance for any advice
Author:  fullchat [ Fri Feb 28, 2014 5:57 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Horrible problem and I have had this myself. I drained the tank by pulling off the pipe at the tank. I didn't have much fuel in it, but you are in a different position. Could try calling AA or RAC, must have this all the time with mis-fueling.

Good luck

David
Author:  Rhett [ Fri Feb 28, 2014 6:14 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Always difficult to give advice in a situation like this, but here is what I would do.

Remove the cover plate under the tank that holds the fuel pump.
Tape the jaws of a pair of locking pliers (to prevent the jaws damaging the rubber), or use a pipe clamp if you have one.
Clamp the rubber hose that feeds the fuel pump from the tank (clamp it near the tank end).
Detach the hose end from the pump and put into a suitable (large) container.
Carefully unclamp the hose to release the fuel into the container.
Clamp whenever you need to change/empty the container, etc.

Use gloves, goggles, etc. Be very aware of what you are handling!

If in any doubt, leave it to a professional..as advised above. :wink:

Hope that helps...be safe!
Author:  RS2000CUSTOM [ Fri Feb 28, 2014 6:50 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Jamie P wrote:

I need to drain the fuel, what is the best way to do this?



Follow the white plastic tube to just before the rear axle on the floor pan

It goes into a white push connector - push the grey ring into the connector and pull the white plastic tube out (like disconnecting an airline)

Disconnect the battery then remove the fuel pump cover and introduce 12v to the live feed to the fuel pump

This will now empty the tank - obviously have containers ready to hold the fuel !

NOTE :- I cannot be held responsible if you go up in flames and offer the above "for reference only" :wink:

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Author:  Jamie P [ Fri Feb 28, 2014 7:15 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Fuel drained.

Thanks guys
Author:  Rhett [ Fri Feb 28, 2014 7:53 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
RS2000CUSTOM wrote:
Follow the white plastic tube to just before the rear axle on the floor pan
It goes into a white push connector - push the grey ring into the connector and pull the white plastic tube out (like disconnecting an airline)

Hi RS....I'm afraid I don't recognise those connectors on a standard 944, have you got a bigger picture to show where they are located on your car? Ta...

They kinda look non-standard as push-fit connectors like that aren't usually used in high pressure petrol systems...I'm intrigued...
Author:  RS2000CUSTOM [ Fri Feb 28, 2014 8:03 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Rhett wrote:

Hi RS....I'm afraid I don't recognise those connectors on a standard 944, have you got a bigger picture to show where they are located on your car? Ta...

They kinda look non-standard as push-fit connectors like that aren't usually used in high pressure petrol systems...I'm intrigued...



There are connectors on PET but mine may well have been replaced/changed at some time in my cars history for a different type

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Author:  Rhett [ Fri Feb 28, 2014 8:20 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Hi RS..those connectors shown in the PET are metal screw fit high-pressure fittings. It looks like your original hard lines have been replaced by nylon/plastic and push fit hydraulic connectors used. Considering the pressure the fuel system runs at I am uncertain as to whether they are a good choice for that application. No real problems on the return feed, but after the pump running to the engine I am unsure...??
Author:  RS2000CUSTOM [ Fri Feb 28, 2014 8:28 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Rhett wrote:

Hi RS..those connectors shown in the PET are metal screw fit high-pressure fittings. It looks like your original hard lines have been replaced by nylon/plastic and push fit hydraulic connectors used. Considering the pressure the fuel system runs at I am uncertain as to whether they are a good choice for that application. No real problems on the return feed, but after the pump running to the engine I am unsure...??



Most if not all Petrol injection systems run at apprx 3 bar = 45 psi

A similar type of connector as the ones used on my car are rated to 16 bar

Just checked Vehicles History file and it appears fuel line replaced by Tom Ferguson Porsche Specialists in 2010 along with the connector
Author:  Rhett [ Fri Feb 28, 2014 8:39 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Well, as they say...you learn something new every day! :)

A 16Bar rating seems like a pretty good overhead. I had never considered using those types of connectors when I researched the replacement of the hard lines on my car...they are darn convenient though... :wink:
Author:  RS2000CUSTOM [ Fri Feb 28, 2014 8:43 pm ]
Post subject:  Re: Fuel Leak HELP!!!!!
Rhett wrote:

Well, as they say...you learn something new every day! :)

A 16Bar rating seems like a pretty good overhead. I had never considered using those types of connectors when I researched the replacement of the hard lines on my car...they are darn convenient though... :wink:



Make sure you buy "petrol proof" ones though :shock:
Author:  timmyturtle [ Sat Mar 01, 2014 7:29 am ]
Post subject:  Re: Fuel Leak HELP!!!!!
Those definitely look like John Guest plumbing fittings.
If they are i would replace them because they go brittle with age just with water going through them.
Author:  944 Man [ Sat Mar 01, 2014 8:09 am ]
Post subject:  Re: Fuel Leak HELP!!!!!
They look like microbore plumbing fittings to me too!!!
Author:  RS2000CUSTOM [ Sat Mar 01, 2014 8:39 am ]
Post subject:  Re: Fuel Leak HELP!!!!!
RS2000CUSTOM wrote:

Just checked Vehicles History file and it appears fuel line replaced by Tom Ferguson Porsche Specialists in 2010 along with the connector



timmyturtle wrote:

Those definitely look like John Guest plumbing fittings.
If they are i would replace them because they go brittle with age just with water going through them.



944 Man wrote:

They look like microbore plumbing fittings to me too!!!



I will take a closer look at the connectors and if any doubt I will change em

Find it strange that a Porsche "Specialist" would use connectors unsuitable therefore leaving themselves liable in the event of a fuel leak due to their negligence ?

Does anyone know if Tom Ferguson is still trading as may give them a call to see exactly what connectors they use / used ?

Invoice address:-

Tom Ferguson - Porsche Specialist Engineers
18 Saltmeadows Road
Gateshead
Tyneside
NE8 3AH

0191 490 0777
Author:  944 Man [ Sat Mar 01, 2014 10:07 am ]
Post subject:  Re: Fuel Leak HELP!!!!!
Old yellowed 15mm version found in a drawer and photographed. Worryingly similar.

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