Worringly high oil pressure
Hello, all.
I recently ran some flushing oil through the engine of my 403, which had had little use for many years, though it's been run quite often in the last year or so, and refilled with 20/50. The oil pressure has always been fine, in the 50-70 range, and maybe 30 on tickover, but on starting since the oil change, it goes to the end of the scale if revved, and 70 on on tickover. I haven't warmed it up thoroughly yet, because I was a bit worried by this.
The pressure relief valve obviously needs adjusting, but I'm worried that what I'm seeing is a blockage somewhere, maybe cause by debris stirred up by the flushing, which is stopping the oil circulating properly.
Any suggestions about what might be happening? Would the oil pressure normally be that high when cold, if the relief valve was stuck?
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