Fuel pipes

[Richair]

This one has been done to death, search is your friend. Spoiler alert: just but the OEM lines from Porsche as it's the most straight forwards and safest solution unless going for a full PTFE set up []

 

[jmelhuish]

Hi Richard,

Thanks for the prompt response, I had a good look but their is no practical advice for the home mechanic. The threads i found were mainly discussing the pros and cons of OEM hard lines and flexible pipes and geared towards someone else doing the work. I know that RPM and PROMAX do kits but it would be very easy to get the kit made up by a local hydralics company

The reason for the post is that I want to find out the diameters of the main and return pipes and information and recommendations concerning the banjo joints. Also the rough length of the pipes and any tips to fit without having to remove various panels would be helpful.

Regards

Jason

 

[Richair]

Been there, done that. Wasted half a day driving around local hydraulic companies only to be disappointed; the problem is all the Porsche fittings are metric where most industrial stuff is imperial. But some have had success. I just bought new lines from Porsche in the end, from what I've seen most people's efforts at DIY kits are a bit of a bodge. like yourself mine was done at home on the drive, taking the bull by the horns and removing the rear beam is advised! If doing OEM replacements you have to do this anyway.

Check out the Arnworx website for all the fitting sizes, you can buy them from them too if you don't mind waiting for them to be shipped over.

 

[jmelhuish]

Hi,
Has anyone made up braided replacement fuel pipes for their 944S2? I'm planning to have them made and change them myself and before I start I want to know if anyone else has done this and can give me any directions? If so does anyone know the lengths, diameters and connections that are required? Or does someone sell a reasonably priced kit?
Cheers
Jason

 

[jmelhuish]

Hi Richard,

Thanks for this its exactly what I was looking for.

Cheers

Jason

 

[colin944]

I made my own Braided lines for my S2. I spent a long time trying to get the correct fittings, in the end I cut the original fittings out of the flexi hoses at the fuel rail end and used them. I had the advantage that a mate had the correct hydraulic machine to press the collars onto the pipes. But in truth I would have been cheaper and easier using the original hard pipes from Porsche. The project started as a way of doing it better and cheaper but ended up a very expensive and complicated solution to a problem ( rusty fuel lines ) that wasn't really a problem in the first place.Th e original lines are 8mm and 10 mm in diameter with m14 and M15 fittings if I remember correctly.

 

[944driver]

Interested to find out more on the best options for this as mine need doing too. I was planning on getting replacement parts from Porsche. Does anyone have the relevant part numbers/current costs for the whole fuel line setup? While doing them and as the axle will be dropped I was also planning on replacing any other service parts at the same time like mounts etc. Are there any suggestions for what is worth changing when you do the fuel lines at the rear?

 

[robdimond]

If you're doing fuel lines at the rear you'd be mad not to replace the steel brake lines and the T-piece at the back as well. Also the fuel filter while the system is drained.

Also a good place to mention my learnings from this morning. Pirtek is often mentioned as a hydraulic supplier that can cut off and remake swaged fittings and so on. I took my oil cooler hoses in this morning to have them repaired, and was told that they have changed their policy (only a few months ago) and are no longer allowed to reuse fittings. They were able to recommend a local company who were happy to do the work.

 

[Eldavo]

torques.co.uk on eBay see all the required fittings and hoses if DIY-ing it.

As said, the feed line is 10mm and the return is 8mm so go for the closest AN size to that AN-8 and AN-6 IIRC. If you're doing the whole run then it would be worthwhile doing it in Teflon braided hose for longevity - the same eBay shop sells decent aluminium hose to body clamps too.

As Rich states, the Arnnworx site will give you all the fittings sizes you need, at the fuel rail it's just a jubilee clip (buy a nice anodised hose finisher one) for the return line and you'll need an adaptor for the feed line to the damper (again, torques sell a Bosch fuel regulator adaptor in a variety of colours). I'm a little hazy on the fuel tank return and pump fittings.

My friend replaced the full lines with black nylon overbraided Teflon hose and black AN fittings and it looks very OEM - think the cost was around £100 too.