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  1. #1
    Vern's Avatar
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    Oil pressure regulator pics - scored, crushed cage?

    I removed the pictured oil pressure regulator due to OIL alarms on my RXP last season. The 'piston' pictured has visible scoring marks from all 4 'ribs' of the cage, the picture only shows the worst one. Since there is visible scoring from all 4 ribs, I am guessing this was over tightened and slightly crushed the cage. There is only one small visible score mark on the bottom of the cage, but you can catch a fingernail in the scoring on the piston.

    Crushed cage? Trapped debris? I will try to mic this cage and my brand new one when I get to the condo to see if there is a measurable difference too.

    Anybody else have pictures of used OPR parts they care to post? Curious to see some that did not set alarms, as well as ones that were definitely crushed cage/setting off alarms.


    Click image for larger version. 

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  2. #2
    ou812's Avatar
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    Normal wear n tear. It's a floating piston so it's going to rub the cage a bit. I always replace them on any rebuild regardless of hours of use. 9 times out of 10 A crushed cage wouldn't let the piston move.
    I'm assuming you replaced the oil pressure sensor with a known working one to confirm?

  3. #3
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Quote Originally Posted by Vern View Post
    I removed the pictured oil pressure regulator due to OIL alarms on my RXP last season. The 'piston' pictured has visible scoring marks from all 4 'ribs' of the cage, the picture only shows the worst one. Since there is visible scoring from all 4 ribs, I am guessing this was over tightened and slightly crushed the cage. There is only one small visible score mark on the bottom of the cage, but you can catch a fingernail in the scoring on the piston.

    Crushed cage? Trapped debris? I will try to mic this cage and my brand new one when I get to the condo to see if there is a measurable difference too.

    Anybody else have pictures of used OPR parts they care to post? Curious to see some that did not set alarms, as well as ones that were definitely crushed cage/setting off alarms.


    Click image for larger version. 

Name:	OPR 1.png 
Views:	150 
Size:	366.5 KB 
ID:	348214
    My two look exactly the same as that and neither were setting off alarms. I gave the piston a rub with wet & dry. Now looks like new and moves inside the cage freely. The springs also have a "spec length" I have noticed different years have different springs and SC versus NA appear to be different?

  4. #4
    Vern's Avatar
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    Quote Originally Posted by ou812 View Post
    Normal wear n tear. It's a floating piston so it's going to rub the cage a bit. I always replace them on any rebuild regardless of hours of use. 9 times out of 10 A crushed cage wouldn't let the piston move.
    I'm assuming you replaced the oil pressure sensor with a known working one to confirm?
    I am replacing it with a new one just to rule out any issues with it. I won't be able to test it until spring, and I do have a mechanical oil pressure gauge now too.

  5. #5
    Vern's Avatar
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    Quote Originally Posted by RXP244 View Post
    My two look exactly the same as that and neither were setting off alarms. I gave the piston a rub with wet & dry. Now looks like new and moves inside the cage freely. The springs also have a "spec length" I have noticed different years have different springs and SC versus NA appear to be different?
    Good to hear yours looked the same. There are different springs for NA, SC, and different years too. My 2005 has two springs and I think later years only use one spring.

  6. #6
    Moderator Snoman's Avatar
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    Vern,mine lookes the same too when i pulled my motor..it is common wear over time....

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