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Metal Guru
 
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The Ultimate Fuel Line Replacement Thread

Given the recent fire disasters suffered by our friend Lothar and others (whose names escape me at the moment) I've been contempating replacing my fuel lines this coming fall.
In doing a search here on the bb I was suprised not to find the usual 20 threads on the subject.
All that I was able to learn was the following: (1) there are two fuel lines that are connected to each other in the tunnel (2) the front fuel line from the fuel pump to the tunnel connection is available from PP but rear line from the accumulator to the CIS is not available.
In the few threads posted on the subject there were no tips or hints on dealing with the tunnel connection or how to make a new rear fuel line.
Let's hear from all you guys who have replaced your fuel lines.
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Old 08-02-2003, 06:07 PM
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If you are talking about the rubber portion of the line then I have a couple of options for you. My lines aren't the same as yours, but the methods will work.

Assuming the hose is a metal portion with a rubber portion crimped onto the end with another metal portion/fitting on the other end of the rubber you can do it yourself or have a shop do it.

I cut the metal that was crimping the hose to the line off with a dremel then fitted new Fuel Injection line (that's important) and then used two worm clamps for saftey.
You need to make sure you get fuel injection hose as it is rated to a higher pressure than regular fuel line. I bought a 6' piece at the local retail autoparts store for about $6.

Or if you can remove the hose then you can probably take it to a hydraulic line place, maybe someplace that does work for an airport and with the old hose they can make you a new one pretty cheaply. At least compared to the dealer.
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Old 08-02-2003, 08:37 PM
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This is disappointing.
We all know how to make our cars go faster or look better. None of us are interested in protecting our investment?
Thanks to masraum for the advice.
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Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb
Old 08-04-2003, 01:49 PM
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Cool

Quote:
Originally posted by 911nut

[B. None of us are interested in protecting our investment?
. [/B]
the hydro line shop has a few fire retardant options for some lines.. and the local speed shop has fire retardent coverings.. but the final word is a fire supression system for a few hundred.
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Old 08-04-2003, 02:01 PM
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Quote:
Originally posted by 911nut
This is disappointing.
We all know how to make our cars go faster or look better. None of us are interested in protecting our investment?
Thanks to masraum for the advice.
Paul, I'm in the middle of running completely new lines in my '75. I found that for about the same price as the OEM plastic lines I could go Aeroquip, so that's what I'm doing. I'm running 6an lines through the center and getting rid of every plastic line, and every hose clamp in the system (except the clamp on the short line that goes from the tank to the pump inlet).

The "accumulator to the CIS" run you mention (I think you mean filter to CIS) is 14x1.5mm on the filter side and 12x1.5mm banjo on the CIS side on my 3.0 930 engine. All fittings are metric, of the 12mm and 14mm x1.5 variety.

What exactly are you wanting to do? I can try to help out with information but I'm not clear what you're asking.

EDIT: one more thing, there is a significant pressure difference between your CIS car and Steve's car. I wouldn't use any clamps or normal injection lines on a CIS (>70psi) pressure line.
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Last edited by cowtown; 08-04-2003 at 03:39 PM..
Old 08-04-2003, 03:30 PM
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I replaced the lines in my cars with aeroquip line -6an. Had to fabricate some adapters for the fittings..
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Old 08-04-2003, 04:03 PM
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I belive that one of those cars that caught on fire burst the fuel filter. yikes
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Old 08-04-2003, 04:06 PM
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I've got webers not CIS but I replaced my lines with -6 AN lines last year. I used mostly Aeroquip and Goodridge fittings with Earls for the Weber fittings.
As for the tunnel I ran a line that was slightly longer than the tunnel with a fitting at each end. This allows me to make future changes to the set up by simply disconnecting the fitting near the tunnel - removing and replacing the tunnel line was kind of a pain.

Regards,
Andrew M
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Old 08-04-2003, 04:32 PM
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Andrew

What did you use for the line running down the tunnel - Aeroquip braided or ????

Mine has some corrosion on hte exposed line that tells me this is in my future project list.

Thanks

Jim
Old 08-04-2003, 04:36 PM
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I used Aeroquip stainless braided line with straight fittings for the tunnel. I also used grommets at each end where the line comes through the bulkhead of the tunnel to minimize potential chaffing.

Regards,
Andrew M
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Old 08-04-2003, 04:59 PM
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Thanks

Jim
Old 08-04-2003, 06:59 PM
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Thanks for the responses.
Andrew, how did you or did you, fasten the Aeroquip line to keep it from sliding around inside the tunnel?
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Old 08-06-2003, 05:54 PM
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I used zip-ties. There isn't much room, on my year there is a sub-tunnel within the main tunnel where the fuel lines run, making it a pretty tight fit with little room for movement.
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Old 08-07-2003, 06:23 AM
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I'd be interested in hearing what anyone has done to replace the lines between the injector rails on their 84-89 Carrera. Finding metric hoses and metric fittings has been difficult, but I haven't tried a hydraulic shop yet. The cost of these is astronomical considering what is there...

Where does a guy look at the Aeroquip stuff?
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Old 08-07-2003, 06:38 AM
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Quote:
Originally posted by BGCarrera32
I'd be interested in hearing what anyone has done to replace the lines between the injector rails on their 84-89 Carrera. Finding metric hoses and metric fittings has been difficult, but I haven't tried a hydraulic shop yet. The cost of these is astronomical considering what is there...

Where does a guy look at the Aeroquip stuff?
I know the fuel line in Earls or Aeroquip has been covered before on this BB.. I sent the info to my brother who has an '88. I'll try to find it? and Aeroquip/Earls may be available here, or it's definately in the Summit catalog
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Old 08-12-2003, 04:50 PM
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Quote:
Originally posted by BGCarrera32
I'd be interested in hearing what anyone has done to replace the lines between the injector rails on their 84-89 Carrera.
This is a copy that a 3.2 guy wrote

"if you know you are going to replace the OEM fuel line with a flexible assembly, why work hard to remove the old metal fuel line? It's virtually impossible to get it out intact without removing some significant parts of the intake system or dropping the engine. Instead, I used a mini tube cutter (
> http://www.generaltools.com/product.asp?action=prdupc&prid=5&sectionid=1 )

to segment the old line into three parts and was able to pull them out easily. I taped them back together as a template for the new custom line. When ready, I snaked the new flex lines into place, joined them together at the T connector, tightened them down, checked for leaks, then secured with a few strategically placed zip ties. Done. FYI: my local dealer wanted $1000 to
fix it. This costs ~$100.

If you smell gas in your 3.2, I strongly suggest you look at the rubber fuel lines found after the fuel filter. Time and heat makes them brittle. My driver's side unit snapped in half with only a light tug. Yikes! "
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Old 08-12-2003, 04:57 PM
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You can buy used Aeroquip fittings here:

http://www.musclemotorsports.com/aeroquip.html
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Old 08-12-2003, 05:04 PM
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any updates from anyone?

from the search that I did it seems like this is a PITA - no?
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Old 11-13-2003, 07:44 AM
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I replaced almost all the fuel lines in my 76. I used a 3/8" stainless brake line for through the tunnel, and up to the accumulator. I have left the stock return line as this one is ow pressure.
I have had good luck replacing all the injector lines as well as most of the lines for the cis. I have been getting the lines for the fuel injection from the local pick and pull. Many model cars came with cis and used the steel braided lines. I got all these for $1 a piece. After carefull cleaning and flushing they worked great. I only have a couple of the original plastic lines left, And I will replace those after the next trip to the pick and pull.
Old 11-13-2003, 08:19 AM
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Finished my Aeroquip project a couple months ago and have >2k miles on it. No problems so far.
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Old 11-13-2003, 09:34 AM
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