Sounds like the oil pressure relief valve spring cound be hanging on the lip
the spring retainer cap.
Take the cap off and chamfer the hole the spring goes into. Check for burrs
the inside of the cap and also check the spring to see if it is bent or
deformed in any way.
Okay, even tho I hadn't seen any burrs, I surfaced and chamfered the cap
anyway. I also tried to chamfer a bit the oil drain back holes in the cap, to
allow them to bleed when the ball just begins to move off the seat. Lastly, I
noticed the -3 washers that Lyc specifies seem a little too small. But -4's
are too large. So I ground down a -4 and put that in to minimize any spring
wobble on the washers.
I also forgot to put back one of the washers. The end result is that oil
pressure is better behaved, although I don't know which variable is
responsible. The oil pressure doesn't rise as high on takeoff as it used to
and still holds 60 psi when oil is hot. I keep meaning to watch to see if it
goes "sproing-g-g-g" but have been in the right seat and since it's not right
in front of my face, haven't noticed.
Thanks for the help so far... will squawk if the problem persists.
Excellence in Ergonomics