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Thread: pressure relieve valve

  1. #1
    Speedster Member
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    May 2013
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    pawling ny
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    221

    pressure relieve valve

    what are the signs of a pressure relieve valve needing to be replaced?

  2. #2
    President Member 53commander's Avatar
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    Feb 2011
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    Hunterdon County, NJ
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    1,040
    When mine stuck I had full oil pressure at idle to the point it broke the gauge.

  3. #3
    Golden Hawk Member StudeRich's Avatar
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    Dec 2005
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    Ferndale, WA, USA.
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    If for some reason the "Control Spring" is weak, wrong or missing, you will have low Oil Pressure, but what post #2 said is the more common situation.

    They need to be clean and free to move more than Replaced.
    Last edited by StudeRich; 03-16-2017 at 03:08 PM.
    StudeRich
    Second Generation Stude Driver,
    Proud '54 Starliner Owner




  4. #4
    President Member
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    SoCal
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    Per what StudeRich says, that's only when you should have high pressure, you may have low pressure.
    The lower the engine rpm, the less the "over pressure" spring does..! While I haven't done a science project on it, I'd guess the piston is held tight to around 1500 to 1800 rpm, before the pressure starts to build to the point of bleeding off pressure.

    In any case, the way springs work, I doubt many actually have weakened to the point of needing replacement in many engines, though...sure, no doubt some have. As has been said, it's more likely not keeping the system clean and having the piston stick in place and causing overly high pressures.

    Mike

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