by Onex107 » Mon Apr 22, 2019 4:47 pm
This problem just popped up after 250 trouble free hours on my Onex. A few days ago I started the preheated engine and the oil pressure on the MGL Extreme spiked to 350 psi for a few minutes then back to 45 then back up to 350. After the oil warmed up it returned to normal and stayed that way for the flight.
I know there has been some VDO pressure sender problems. I'm now doing the Condition Inspection and when I did the warm up for oil drain and compression test I paid better attention to the pressure. I added a ground strap to the VDO with no change. Oil temp at start up was 60 degrees, air temp. Start and run at 1200 rpm, won't idle slower until cylinders warm up, the o.p. started at 45, then jumped to 350 and stayed there for a minute, then back to 45. It did that until the o.t. reached 80-85 then settled down and read normal for the rest of the warm up. I will look st the feed wire and RDAC connections also.
Today I pulled both pressure control valves. They were clean, fell out of the hole, no obvious dirt or scratches. I did smooth off the cut ends of the springs to avoid any friction there.
I don't want to add a mechanical gauge. What do you guys think? What do you recommend? Has anyone seen this before?
OneX 107
N2107X