Stnelson903 Posted May 19, 2019 Report Posted May 19, 2019 I have a ‘79. M20k 231. Was on a 2 hour flight today and the oil pressure kept rising. Arrived at destination just as it got to the top of the green. Oil and filter and annual and oil analysis done 5 hours ago. No visible sign of an oil blown out anywhere. Any ideas? Sent from my iPhone using Tapatalk
carusoam Posted May 19, 2019 Report Posted May 19, 2019 Can you report the oilT that was occurring at the same time.? What oil were you using... Typically oil viscosity and pressure drop with increased temp... If the oilT was kept low for some reason, it may have had an adverse effect on the oilP... Got any pics or JPI graphs to share? PP thoughts only, not a mechanic... Best regards, -a-
Ragsf15e Posted May 19, 2019 Report Posted May 19, 2019 Oil temp trends during the flight would definitely help. Do you have a downloadable engine monitor?
PTK Posted May 19, 2019 Report Posted May 19, 2019 (edited) 20 minutes ago, Stnelson903 said: I have a ‘79. M20k 231. Was on a 2 hour flight today and the oil pressure kept rising. Arrived at destination just as it got to the top of the green. Oil and filter and annual and oil analysis done 5 hours ago. No visible sign of an oil blown out anywhere. Any ideas? Sent from my iPhone using Tapatalk I would suspect a malfunctioning pressure relief valve. Was it adjusted at annual? If it’s malfunctioning or failing my concern would be that lubrication of the engine may become compromised. This is an airplane grounding issue until solved, imo. Edited May 19, 2019 by PTK
Stnelson903 Posted May 19, 2019 Author Report Posted May 19, 2019 Every temp on every gauge was normal. Sent from my iPhone using Tapatalk
RobertGary1 Posted May 20, 2019 Report Posted May 20, 2019 On 5/19/2019 at 3:02 PM, PTK said: I would suspect a malfunctioning pressure relief valve. Was it adjusted at annual? If it’s malfunctioning or failing my concern would be that lubrication of the engine may become compromised. This is an airplane grounding issue until solved, imo. Lycoming says the only concern with high pressure is creating new leaks but it takes more than red line to do it. -Robert
DXB Posted May 21, 2019 Report Posted May 21, 2019 The only time my oil pressure runs high in the normal range (sometimes even touching red line) is upon first going to full power for takeoff. This sounds like a very different issue. Consider posting the downloaded tracings from the engine monitor if you have them. They will attract more input from the experts. I struggle to grasp the oil circulation system on my Lycoming and haven't a clue about your turbo Continental.
Guest Posted May 21, 2019 Report Posted May 21, 2019 Oil flow diagram for a typical Continental engine from Tips on engine care manual, http://continentalmotors.aero/xPublications/Maintenance Manuals/TEC-1/ Clarence
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