---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 06/22/11: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:58 AM - Re: Low Oil Pressure Indication on Cockpit Gauge (dashwood) ________________________________ Message 1 _____________________________________ Time: 05:58:01 AM PST US Subject: RotaxEngines-List: Re: Low Oil Pressure Indication on Cockpit Gauge From: "dashwood" i too have been chasing oil pressure issues in my 912. sourced a few problems with leaking oil lines and seals in gearbox...see posts over the last year by me about this and the gearbox failure. i replaced the vdo sender 3 times. the pressure readings after 10 to 50 hours would start fluctuating or fall off too low... i replaced the elec oil stuff with a steam gage style. very very small copper tube (1/16"). with a 2.5" loop at the engine outlet, another loop at the firewall and a "s" curve behind the gage. i did not change the relief valve to the new style. i did not bleed oil through the tube to the gage when i installed but the readings were rock solid from the time of first start with this system.. i would get a steady increase in pressure to about 70lbs on a cold start.. and very little fluctuation at any rpm settings. my ame said i should have put a slight crimp in the line close to the engine in case of a line break. to slow the oil loss. i did that in 2 seconds with a pair of pliers. after about 8months of bliss running amsoil full synthetic 20/40 and 20/50 i changed oil type. used to have..... oil pres of 65lbs in all settings. slow pres rise when cold. rpm at climb out or 5280 and max 5300 in level cruise. egt of 1500 to 1570. oil temps around 220F after changing to shell +4 semi syn the pressure rises quickly to 38lbs and stays there at idle and taxi rpm. as rpm increases to full throttle the pressure increased to 65lbs and stays there solid.climb out is 5300 and level cruise starts at 5400 and quickly goes over 5520( the setting for my max over rev alarm) I now have to throttle back to maintain 5400. egt is constant at 1400 and oil temps stay close to 200F. fuel burn / hour has decreased slightly, and oil consumption / hours has increased slightly. ie no oil consumption at all till approaching time for a change (50hrs)now is 1/8 cup every 6 to 8 hours. i have about 25 hrs on the newer oil in varied weather conditions. i feel the engine is performing better with less strain with this (shell airo +4) -------- Ross Aalexander: CH701 driver 912ul 490tt Read this topic online here: http://forums.matronics.com/viewtopic.php?p=343748#343748 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.