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Thread: Oil pressure relief piston - plastic

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  1. 04-26-2024, 07:23 AM #5
    911MRP
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    My understanding is overpressure in the oil filter console for operated at 9.1 Atü for model 72. The material choices dimensions etc are of course a factor as if the chosen stuff disintegrates could be an issue. I’d suggest it also important to be confident that any local “have a go” work at repairing the parts as mentioned in OP still results in it operating to the original design spec in any over-pressure situation. Things on the circuit may now be 5 decades old. I understand the earlier 69-71 over-pressure protection was designed to operate at lower figure (8 atü) so was not a consistent figure over the years. Source is a Porsche technical bulletin. This information being from an old factory source of mid 73 using old school atü is shared for historic hobby interest only. Not sure still applicable. Do not rely on it for precious engine. I recommend a competent expert does the work on any part that was designed to protect in certain scenarios and at the appropriate accurately defined pressure figure .

    Steve
    Last edited by 911MRP; 04-26-2024 at 07:46 AM.
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