Stacy Posted April 21, 2017 Report Share Posted April 21, 2017 After flying for 45 minutes, I added full power to climb higher. The high oil pressure warning light came on. I reduced RPM's and the light went off. The pressure on the Dynon peaked at around 100 lbs. I flew for maybe two hours, at 5200 RPM's, and the pressure was fine. But, before reaching home, I had to continue to reduce power to keep the oil pressure down. The last thirty minutes of the flight, I had to keep the RPM's down to 4,600. I didn't check the log, but I think I have less than 25 hours on the oil and filter change. During that time, I had one flight that required me to put in 10 gallons of 100LL. On the flight where the problem started, I had added 21 gallons of 100 LL. I'm going to change the oil and filter when I get time, as well as cut the filter open. During my previous oil and filter change, I had flown 43 hours, without out the need to add oil, and filter looked good. I had probably used about 30 gallons of 100 LL, but like the week ends flight, it was mixed with 91 octane. What are your thoughts on what is going on? Link to comment Share on other sites More sharing options...
Tom Baker Posted April 21, 2017 Report Share Posted April 21, 2017 If you have the VDO sending unit I would say most likely a bad sending unit. It could also be a bad ground. I can't think of to many engine failure modes that will lead to high oil pressure. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 21, 2017 Report Share Posted April 21, 2017 I agree with Tom. Most likely a sending unit and or ground. Link to comment Share on other sites More sharing options...
Stacy Posted April 22, 2017 Author Report Share Posted April 22, 2017 Thanks guys, I'll check it out Link to comment Share on other sites More sharing options...
cgrbu Posted April 22, 2017 Report Share Posted April 22, 2017 On this theme of indications, I have had recently very high oil temperature indication on my Dynon Skyview 160 deg C, it triggers the master engine warning light. Using a laser temperature sensor the oil tank was only 80 deg C. Also have had the MAP INHG indicate a red cross and the #2 EGT indicate a red cross at low RPM setting. Is there a common grounding wire to these connections? Link to comment Share on other sites More sharing options...
Roger Lee Posted April 22, 2017 Report Share Posted April 22, 2017 Check the 5 ground points off the battery in the engine compartment. Then make sure the one ground bolt through the fire wall into the right side instrument panel is really tight. Any loss of ground or usually just a weak connection can cause this. Link to comment Share on other sites More sharing options...
cgrbu Posted April 23, 2017 Report Share Posted April 23, 2017 thanks Roger...will do, I changed the battery last fall and I may have affected the set-up Link to comment Share on other sites More sharing options...
FlyingMonkey Posted April 24, 2017 Report Share Posted April 24, 2017 You didn't put the 100LL in the oil tank, did you? It definitely sounds like a sender. I had my oil pressure sender go bad a couple of times. Is your sender on the engine or the firewall? The ones on the engine fail much more often. Link to comment Share on other sites More sharing options...
cgrbu Posted April 26, 2017 Report Share Posted April 26, 2017 Update:... after a pleasant discussion with Roger, all his suggestions followed and I found that things were secure and tight. On a further inspection I noticed the back of the new LED light housing very close to the oil temp sensor. With the liberal movement of the cowling it must have been hitting the sensor clip. I have added an insulator around the temp connector and it is giving proper oil temp readings. The #2 EGT probe was cleaned and re-seated in the exhaust pipe but it is still red crossed out. Have made enquiries with Rotech Research in Vernon, no update yet...thanks to all or suggestions Link to comment Share on other sites More sharing options...
Roger Lee Posted April 28, 2017 Report Share Posted April 28, 2017 The EGT probe may just be dead. They are about $36. It may be time to replace it. Link to comment Share on other sites More sharing options...
Anticept Posted April 28, 2017 Report Share Posted April 28, 2017 EGT probes last between 500-1500 hours, depending on the kind of flying you do. I seem to get a failure every 800 hours or so. That's pretty typical across the reciprocated engine industry. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 28, 2017 Report Share Posted April 28, 2017 Dynon only says 200 hours and you're on your own. You do see them go from anywhere from 300-2000+ hours normally. There is no way to predict and failure, but they're only about $36. Link to comment Share on other sites More sharing options...
cgrbu Posted April 29, 2017 Report Share Posted April 29, 2017 installed new EGT probe, still red cross-out arrow... will check all connectors again and the line into firewall Link to comment Share on other sites More sharing options...
sandpiper Posted April 30, 2017 Report Share Posted April 30, 2017 Experienced high oil pressure today. Actually it was pegged at the max on my steam gage and that is where it stayed for entire flight. Checked ground connections, no joy. Replaced oil pressure sensor using Loctite 243 and prop[er torque. Problem solved. Mine is not a remote mount. This is replacement #2 in 500 hours. They are cheap enough and takes me about 30 minutes to replace by the time I get the manual out and grab a couple of tools. That means Roger can do it in 15 minutes. Or less! Link to comment Share on other sites More sharing options...
cgrbu Posted April 30, 2017 Report Share Posted April 30, 2017 To add to the EGT issue, I have been working on the wrong side of the engine. I thought #2 EGT would have been for the left or even numbered exhaust 2&4 and #1 for the 1&3 exhaust but by chance I disconnected the new probe clips on the left side of the engine and it showed #1 as red crossed arrow on the indicator... i will install another new probe on right side and I anticipate all will be okay. Link to comment Share on other sites More sharing options...
Roger Lee Posted April 30, 2017 Report Share Posted April 30, 2017 One easy way to check to see if a single probe has gone bad or if the problem is up or downstream in wiring is just unplug one and plug it into the other. It will tell you right away where to look or answer your question as to whether the probe is bad. Link to comment Share on other sites More sharing options...
cgrbu Posted May 1, 2017 Report Share Posted May 1, 2017 thanks Roger but the wires are too short for interchangeability in order to test .. Link to comment Share on other sites More sharing options...
Roger Lee Posted May 2, 2017 Report Share Posted May 2, 2017 Make an extension. The right side will plug into the left side. You will have to get behind the passenger panel though. Link to comment Share on other sites More sharing options...
cgrbu Posted May 9, 2017 Report Share Posted May 9, 2017 Hello Roger.... hope the vacation was fun... all good here, new EGT probe working and waiting for another to come. Replaced the rectifier-regulator today, nasty job but all good after the change over. Link to comment Share on other sites More sharing options...
Roger Lee Posted May 9, 2017 Report Share Posted May 9, 2017 Vr replacement is easy on the SW, but a PITA on the LS. Glad things are coming around for you. Link to comment Share on other sites More sharing options...
Stacy Posted May 23, 2017 Author Report Share Posted May 23, 2017 Thanks guys and thank you Roger for further instructions over the phone on Saturday. it was the sending unit. They sent the wrong one to me, but Roger told me how to make it work. Link to comment Share on other sites More sharing options...
floats Posted August 22, 2017 Report Share Posted August 22, 2017 On 30/04/2017 at 0:11 AM, sandpiper said: Experienced high oil pressure today. Actually it was pegged at the max on my steam gage and that is where it stayed for entire flight. Checked ground connections, no joy. Replaced oil pressure sensor using Loctite 243 and prop[er torque. Problem solved. Mine is not a remote mount. This is replacement #2 in 500 hours. They are cheap enough and takes me about 30 minutes to replace by the time I get the manual out and grab a couple of tools. That means Roger can do it in 15 minutes. Or less! What brand did you use for your oil sensor replacement Link to comment Share on other sites More sharing options...
Roger Lee Posted August 23, 2017 Report Share Posted August 23, 2017 VDO. This will depend on the year engine you have. newer engines use a different type altogether. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted August 23, 2017 Report Share Posted August 23, 2017 12 hours ago, Roger Lee said: newer engines use a different type altogether. No kidding? What type do they use? I'm sure it's more expensive! Link to comment Share on other sites More sharing options...
Anticept Posted August 23, 2017 Report Share Posted August 23, 2017 Keller piezoelectric type sensors. $150-200. But they last and last and last. Link to comment Share on other sites More sharing options...
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