yes, and.......
increasing oil pressure relief valve spring tension will not produce oil
pressure where there isn't any,
or make OP higher when the oil is very hot.

they only limit the upper oil pressure attained on a cold engine.
checking that the pistons aren't stuck or sticky is a good thought for sure
.

----- Original Message -----
From: "Kenneth Lewis" <kdlewis@NORTHSTATE.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, August 09, 2009 5:53 AM
Subject: Re: temperature-oil pressure (rather long)

> David,
> An oil temperature gauge would be a handy aid here. Before I added an oil
> cooler I used the oil temp gauge to dictate my speed. If the oil
> approaches 220 degree I would back off the gas pedal.
> Try lowering your oil level a bit. With the level to the full mark the cam
> whips the oil into a froth.
> I am surprised the quick-fix techs didn't check the oil relief valves and
> springs.  I would clean the valves(I think the WBX has two) and bores so
> they move freely. Make sure the springs are the correct length, it might
> buy you a couple psi.
>
> Good Luck
> Ken Lewis
> http://neksiwel.20m.com/photo_1.html  oil cooler stuff