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Thread: 1967 911 pressure line failure

  1. 07-03-2017, 07:39 PM #1
    Jawsrestorations
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    Question 1967 911 pressure line failure

    I have a newly restored 1967 911 Targa that I'm just finishing. I now have blown 2 pressure oil lines. They failed at the crimped fitting at the engine ( left side ). I thought that I might have had a bad line at first but now that it happened twice I'm looking for suggestions. The car doesn't have a pressure gauge. I did notice that it happened under acceleration. First time in the shop while revving the motor the second while driving and accelerating. Both times I immediately shut down once hearing the line pop. Thanks in advance for your input.
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  2. 07-03-2017, 08:53 PM #2
    edmayo
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    Temporarily install a generic mechanical oil pressure gauge so you can see what the pressure is. Was the engine rebuilt during all this restoration work?
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  3. 07-04-2017, 03:29 AM #3
    66S
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    Could be some kind of restriction in the scavenge circuit. Does this happen hot or cold? When you start a cold 911 motor the scavenge pump sends more oil and less air for about a minute then more air gets mixed with the oil and the danger of high pressure decreases. Maybe a problem with the bypass valve in the filter console. Some riacers like Wix filters for less restriction. I have seen the filter console installed in the wrong position blocking the return of oil to the tank and damaging parts.
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  4. 07-04-2017, 03:41 AM #4
    Jawsrestorations
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    42 thousand miles on the motor. Top end wand carbs redone. Next plan was to install pressure gauge. Will do tomorrow.
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  5. 07-04-2017, 03:43 AM #5
    Jawsrestorations
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    Happens after the car is warmed up. Used a Porsche filter. Will check the install.
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