MC engine rebuild - low oil pressure

[Ben Swann]

Try perhaps switching to a straigh 30 weight as your break in oil, then
switch to 10W-40 winter or 20W-50 summer.  Personal experience is 10W-30 is
too light for these engines.

That pressure does sound low - was it measured at idle or at higher RPM?

Ben

[Patient:  Rebuilt 1986 MC-1 turbo engine recently installed in my 4kq.

The engine in question was completely rebuilt (by me and a friend) with a
checked std. size crank (verified by machine shop), new bearings all the
way
around, rings, guides, seals, etc.

Symptoms:  Oil pressure cold is around 30-35 psi (around 2-2.5 bar), then
drops to around 10-15 psi when warm.  Pressure warning light and buzzer go
off above 2200 rpm (as designed).  Pressure does not rise much when engine
is revved.  Oil is traditional Castrol 10w30 for break in period.
<snip>

Any other ideas or things to check?  Obviously, I wanted to avoid getting
back into the bottom end so soon after the swap... kind of bums me out and
lets some wind out of the sails.

Thanks guys...

Elliott Bavely]