---------------------------------------------------------- Aerobatic-List Digest Archive --- Total Messages Posted Mon 07/20/15: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:33 AM - erratic oil temperature indication (Markus Feyerabend) 2. 06:52 AM - Re: LycomingEngines-List: erratic oil temperature indication (Carl Froehlich) 3. 07:55 AM - Re: erratic oil temperature indication (Jeff) ________________________________ Message 1 _____________________________________ Time: 06:33:19 AM PST US From: "Markus Feyerabend" Subject: Aerobatic-List: erratic oil temperature indication Hello all, I recently noticed that the oil temp reading in our Extra became erratic and the indication is jumping between about 160F and 200F. The high value seems to be at around the level I expect, while the low level is certainly too low. The needle in the temp gauge (Westach twin indicator for oil pressure and temp) is not moving slowly but jumping quite fast back and forth. It seemed to be ok when I warmed up the oil on the ground before an oil-change, but in flight (with higher oil temps) the problem came back. Has anyone seen something like this before and can give some recommendations to what we should look at? Im suspecting the temp probe right now, but as the plane is more then an hour away from my home, Id rather get as much suggestions from anyone experienced, before getting lost an endless "trial and error" hunt , chasing the issue. Thanks, Markus ________________________________ Message 2 _____________________________________ Time: 06:52:30 AM PST US Subject: Aerobatic-List: Re: LycomingEngines-List: erratic oil temperature indication From: Carl Froehlich Probe. If you have a connector in line with the probe you might get lucky and find that is the problem - for that matter look over the probe wire itself to see if it has chaffed or otherwise damaged. Carl > On Jul 20, 2015, at 8:32 AM, Markus Feyerabend wrote: > > --> LycomingEngines-List message posted by: "Markus Feyerabend" > > Hello all, > > I recently noticed that the oil temp reading in our Extra became erratic and the indication is jumping between about 160F and 200F. > The high value seems to be at around the level I expect, while the low level is certainly too low. The needle in the temp gauge (Westach twin indicator for oil pressure and temp) is not moving slowly but jumping quite fast back and forth. > It seemed to be ok when I warmed up the oil on the ground before an oil-change, but in flight (with higher oil temps) the problem came back. > > Has anyone seen something like this before and can give some recommendations to what we should look at? Im suspecting the temp probe right now, but as the plane is more then an hour away from my home, Id rather get as much suggestions from anyone experienced, before getting lost an endless "trial and error" hunt , chasing the issue. > > Thanks, > Markus > > > > > > ________________________________ Message 3 _____________________________________ Time: 07:55:26 AM PST US Subject: Re: Aerobatic-List: erratic oil temperature indication From: Jeff Hi Markus, The only time I've seen that before is when I've had a bad sender or loose connection. Typically temps are the slowest moving of any sensor. Jeff Sent from my iPad > On Jul 20, 2015, at 7:32 AM, Markus Feyerabend wrote: > > > Hello all, > > I recently noticed that the oil temp reading in our Extra became erratic and the indication is jumping between about 160F and 200F. > The high value seems to be at around the level I expect, while the low level is certainly too low. The needle in the temp gauge (Westach twin indicator for oil pressure and temp) is not moving slowly but jumping quite fast back and forth. > It seemed to be ok when I warmed up the oil on the ground before an oil-change, but in flight (with higher oil temps) the problem came back. > > Has anyone seen something like this before and can give some recommendations to what we should look at? Im suspecting the temp probe right now, but as the plane is more then an hour away from my home, Id rather get as much suggestions from anyone experienced, before getting lost an endless "trial and error" hunt , chasing the issue. > > Thanks, > Markus > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aerobatic-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Aerobatic-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/aerobatic-list Browse Digests http://www.matronics.com/digest/aerobatic-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.