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Oil Pressure Relief Valve Stuck


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#1 Shaked

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Posted 25 May 2019 - 08:14 AM

Hi
My oil pressure led turn on while idling ,
When I open the throttle it’s gone ,
Checked relief valve and it’s stuck quite hard :(
Tried to take it out with magnets, circlip tool and nothing .
Do you have any idea?
Before I will take the head off
Thanks 🙏

#2 gazza82

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Posted 25 May 2019 - 08:21 AM

You don't need to take the head off!

Try search function ... but think you may need to tap a thread into the valve shuttle and screw in a bolt to pull it out.

#3 DeadSquare

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Posted 25 May 2019 - 09:06 AM

Behead your engine will not help to remove the relief valve.

 

Replace the cap without the spring.   Start the engine and really rev it for two seconds.  Check to see if the valve cup has moved.


Edited by DeadSquare, 25 May 2019 - 09:16 AM.


#4 Shaked

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Posted 25 May 2019 - 10:11 AM

Will try to do both
First with the spring out
If won’t work will drill the valve out

#5 gazza82

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Posted 25 May 2019 - 11:15 AM

Will try to do both
First with the spring out


Make sure the screw on cover is back on or 70 psi of oil may also fly out.

If won’t work will drill the valve out


You just need to jam something in the end .. large bolt, etc ... drilling will mean stripping the engine completely to get all the swarf out. Chances are the valve will just spin anyway ...

#6 Shaked

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Posted 25 May 2019 - 02:06 PM

Will definitely make sure that the cap is closed 👍👍
Thank

#7 unburntfuelinthemorning

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Posted 25 May 2019 - 06:25 PM

I'd try threading a bolt into it first to pull it out with. 

 

If you rev the engine without the spring in there you're running the engine at high speed with no oil pressure.  As a last resort maybe but don't try that first.



#8 DeadSquare

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Posted 25 May 2019 - 06:43 PM

The fact that there is low oil pressure at low RPM could indicate that the valve cup needs knocking in, into place.

 

Without opening mine up and looking, does anyone have a valve cup that can check if it is threaded to take a bolt, and if so, what diameter it is ?



#9 Magneto

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Posted 25 May 2019 - 10:25 PM

I used a 1/2' thread tap, went right into the cup, and as soon as it started to turn the cup I could pull it out...mine was really buggered up on the sides too.



#10 RooBoonix

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Posted 26 May 2019 - 03:51 PM

I also used a tap to get mine out, my car didn't even have oil pressure issues but it didn't want to come out. As Magneto said as soon as the tap bites the cup will probably pull out

#11 Shaked

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Posted 26 May 2019 - 08:30 PM

Hi guys
Thank you for your help 🙏
I have managed pulling the valve out like you suggested,
But I’m afraid that I have got a bigger issue now ,
When I took it out ,it had a lots of metal chips on it,
I cleaned the valve and the engine with a magnet to remove every bit of metal .
After doing this and return the valve back, everything works ok.
Any suggestions what could it be?
The engine and gearbox rebuild 500 miles ago
Thank you all

Edited by Shaked, 26 May 2019 - 08:33 PM.


#12 DeadSquare

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Posted 26 May 2019 - 11:05 PM

Can you provide a close-up photo of the bits ?



#13 Shaked

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Posted 27 May 2019 - 04:27 AM

Can you provide a close-up photo of the bits ?


Throw them away, very small metal flakes
About 0.02”

#14 Rorf

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Posted 27 May 2019 - 05:36 AM

Fortunately most of the metal flakes that have gone through the PRV will have been trapped by the oil filter. The oil pump might have suffered some wear. I would suggest you dump the engine oil and see what is stuck to the magnetic sump plug. Any steel filing and flakes would have come from the gears in the gearbox or the timing chain and sprockets.

 

Of course the right thing to do would be to remove and strip the engine :X


Edited by Rorf, 27 May 2019 - 05:37 AM.


#15 unburntfuelinthemorning

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Posted 27 May 2019 - 07:17 AM

The engine and gearbox rebuild 500 miles ago
 

How thorough was the engine rebuild.  Was the oil pressure release valve removed then? 






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