Yesterday taxiing out I got a high oil pressure reading (100+psi) at ~1300RPM. I pulled the valve and checked the ball and spring to make sure something wasn't was stuck, then backed off the adjustment a turn or so. I think it's OK now but my question is, what's to stop the thing from rotating other than thread friction and spring tension? It seems like vibration might be enough to get it to rotate on its own (esp. over 1200hrs or so on this airframe/engine). The adjustment rod isn't safetied, should that be done somehow?
This is a LYC O-360 A1A normally aspirated with a screw-adjustable relief valve.
This is a LYC O-360 A1A normally aspirated with a screw-adjustable relief valve.