I replaced the BEBs on my 1995 1HZ at about 230k km and they were a bit scored in places but no delamination or other things like the disaster photos posted on this forum.
My oil pressure relatively high when cold at about 3.5 bar (50 psi) and in the very cold weather -25C it was up to 4.5 bar (63 psi) on start-up.
However, when at running temp, it falls to 2 bar (28 psi) at modest running speed (1800 rpm) and down to 1 bar (14 psi) at idle.
I don't worry about it, there's no untoward noises from anything.
I've always been under the impression that it's the oil flow (or restriction) through the mains that regulates the oil pressure, but that may be an out-of-date concept after reading Frank's post above.
Surely, very high oil pressure would indicate a high restriction, thus a lower volume of flow, so I'm guessing that there's a compromise point where the flow is sufficient whilst maintaining a suitably pressurized cushion to keep metal from touching metal during operation...
Whatever, but I'm approaching 400 k km now and I'm wondering if I should change them again? I used Mr T calibrated shells last time, not ACLs or another brand.
But because there was so little damage showing on the 230 k km BEBs, I'm a bit reluctant to do them again.
I know, I know, better safe than sorry, it's ringing in my head, but it's not an HDJ and I'm also paranoid about changing the oil and Mr T filter at 10 k km, so what to do...
Decisions, decisions....