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bperry |
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Lurker ![]() ![]() Group: Members Posts: 477 Joined: 16-February 04 From: Dallas, Tx Member No.: 1,661 ![]() |
As I'm doing a bunch of work on my 74, I decided to replace the original
plastic fuel lines with some stainless lines. I am amazed that these plastic lines are still working and that they hadn't cracked given their age. The plastic lines seemed kind of hard but I didn't think much about it other than I never really liked them. So I get everything loose and get ready to pull the lines and had to pop the plastic lines out of the plastic keepers on the firewall, and CRACK, the return line shattered and cracked right where the line starts to go up towards the engine shelf. After I pulled the lines, I carefully examined them and noticed that the plastic inside the tunnel seemed to still be soft and bendable; however, the plastic beyond the firewall in the engine compartment was very hard and the closer you get towards the corner were the heater tube is, the more brittle the lines get. In my situation, the more brittle line was actually the return line which would be the absolute worse line to break since the pump would continue to pump fuel even after the line broke. Anyway, I have attached some photos showing what I noticed. I am now a believer like Clay in removing and getting rid of those plastic lines. At this point I question why anyone would continue to use the stock factory lines. It is only a matter of time before they cause a problem. Luckily for me, the break happened while I was actually replacing the lines. -------------------------------------------- A few notes on Clays Technical Article: It would be useful to tell/show folks the 2 places where the lines are attached inside the tunnel. One is under the shifter, the other is directly under where the wire harness enters the cabin just in front of the access panel by the firewall. Both of these need to be loosened before the lines can be removed and its not particularly easy to do. One tip I learned is to make sure that both ends of each line is open and blow some compressed air through them PRIOR to removal. This will ensure that there is no remaining fuel in the lines to spill inside the tunnel. - Guess how I figured out this one..... Another tip that I've read about and intend on doing relates to if there is concern about rattling of the lines. The tip is to slip the tubing through heat shrink tubing has you install the lines. Nice and simple and should be effective. --- bill Autopsy Pictures follow: ![]() ![]() |
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