uprated oilpressure relief springs

[roughground]

I've just completed a rebuild on my engine and found the oil pressure sliding slowly downwards. Having run it since the rebuild with normal pressure this surprised me. I took off the oil pressure relief valve and cleaned out the hole. Put it back and found normal pressure again. (50 PSI at 1500rpm)

To stop this happening I'm going to replace the vale and spring. Has anyone any thoughts on the use of an uprated spring?

[elclem1]

Yep no brainier for me. Always sits just above 50psi.

[openroad]

Hi rough ground, I have just renewed plunger and spring, and was told by a specialist that this only effects the tick over oil pressure,

Conrad.

[TriumphV8]

The spring is used to limit the maximum pressure,

not the pressure at 1500 rpm when warm.

 

Unfortunately I had similar experiences on my Porsche 911.

Some dust was in the valve decreasing the oil pressure.

The only remedy is to clean the valve and normally there

should not come new parts through the pump when oil is clean.

 

Keep in mind that any higher max pressure will put load on the

pump drive. There are several parts to wear and break and more

than 100 psi max pressure is not necessary.

[Guest ntc]

Warm run at 50/60 all rpm tickover 20/25 on the money.Do not fit a uprated spring for road use.

Edited April 16, 2016 by ntc

[stuart]

Warm run at 50/60 all rpm tickover 20/25 on the money.Do not fit a uprated spring for road use.

Or fit washers under the spring! Seen that done and owner wondered why it blew his oil cooler apart!

Stuart.

Edited April 17, 2016 by stuart

[roughground]

Thank to you all for suggestions. I don't want my aging pump to give up the ghost or encourage leaks in places that don't leak at the moment.