911 SC fuel hose replacement

[hardebeck]

Hi all,
Nice day today so I started my 78 SC up and pulled out of the garage. Engine started surging and I smelled gas, so I popped the engine bay hood and saw fuel shooting out of the braided hose a couple inches down from the hose clamp that's connected to the metal pipe on the top of the fuel filter. Shut it off immediately and thankfully nothing worse than fumes. From my searches, it appears the hose is NLA (930.110.514.00). Our host sells replacement braided hose by the meter but before I go that route I wanted to make sure that the hose clamp at the top is legit. I'm pretty sure it left the factory with a different fitting. I also don't know how the other end attaches to the FD either so I'm looking for some wisdom/advice to fix this properly. Appreciate any and all suggestions.

[hardebeck]

Upon further research, it appears that the correct, current part number is 930-356-068-04, which means one of the previous owners must have hacked the original hose and replaced it with this. Can anyone confirm whether this part number is indeed correct?

[boyt911sc]

I don’t think that braided fuel line is rated for fuel injection system. The use of that clamp is a NO NO for fuel injection lines. You are lucky this time. Replace it with a fuel injection rated fuel hose with crimped ferrule instead of this micro clamp. Those are commonly used in low pressure system like carbs. Never in a CIS with 70 psi. system pressure and could get up to 100 psi.

Tony

[hardebeck]

Thanks Tony. I've owned the car for 7 years and never thought about whether this was proper, unfortunately. I would have expected the shop that rebuilt my engine to notice that and say something, but they didn't. They did an awesome job on the rebuild but kinda disappointing they didn't catch this. Hoping to replace with an OEM version if anyone can confirm the part number.

[BoxsterGT]

hardebeck-

Yes, you are very lucky this time.

This is the Fuel Feed from Filter to Fuel Distributor and is 6mm Polyamide tube with a 3mm line to the cold start.

If the rebuilder also installed the motor, they probably found an issue with the original line and used this hose. It is absolutely the wrong part.

The PN you have is for the Rear fuel pump feed on a 930 and not applicable here.

Not sure if a factory replacement is now available as it was NLA for a long time.

The PN I have is 930.110.570.00

Hope this helps.

If you have trouble finding this, I can "Re-Make" one using your original fittings.

Len

[Mark Salvetti]

That part seems to be available from several vendors, but it costs around $300.

Many of us (myself included) have bought replacement lines from Len, including NLA parts.

Mark

[hardebeck]

Len and Mark, thank you so much for the replies. Len, when I looked up that part number it didn't look right because of the 2nd line to the CSV, but when I stuck my phone behind the engine, sure enough, there's another line hiding under the braided line. This hack existed when I bought the car so my rebuilder isn't responsible to be fair, but I am surprised they didn't swap out all the lines or at least recommend I do so when the engine was out of the car. It's tight back there but it seems like I can get a wrench on the compression collar and remove the fitting, so I'm hoping I don't need to do any major operations to swap out the line. Len, based on the myriad of rave reviews on this forum, I'd be foolish not to take advantage of your expertise. I'll send you a PM to get the details. Thank you!

[hardebeck]

Len, tried to PM you but your mailbox is full. Please PM me when you have a minute. Thank you.

[Mark Salvetti]

Originally Posted by hardebeck

Len, tried to PM you but your mailbox is full. Please PM me when you have a minute. Thank you.

Email only. Try Len dot Cummings at Verizon dot net.

Mark

[hardebeck]

Roger that. Thanks Mark.

[hardebeck]

Quick followup and thanks for pointing me to Len/@BoxsterGT. Just received my newly rebuilt fuel lines with original fittings replated, along with the remnants from the previous hack job. Can't wait to install and get back on the road. Thanks again Len, and to anyone finding this thread, I highly recommend Len. As good as OEM and less expensive than aftermarket options.

[JSV798]

I also have a 1978 SC so interested in this. Looks like you are replacing just the rubber hoses? I take it that you are not replacing the lines going through the tunnel?

Roy

[hardebeck]

Originally Posted by JSV798

I also have a 1978 SC so interested in this. Looks like you are replacing just the rubber hoses? I take it that you are not replacing the lines going through the tunnel?

Roy

I just replaced these because one was leaking and the other wasn’t far behind. The tunnel lines are on the project list but I’m leaving them for another day. Hopefully that won’t come back to haunt me as these things often do.