SonexBuilders.net

Re: Turbo flying
Postby SonexN369UR » Tue Apr 05, 2016 12:44 pm

Hello to all. Yesterday I started for the first time my turbo upgrade to N369UR. I got HIGH oil pressure (approx 85-90 PSI from idle to 1600 RPM at about 15 inches MP. Shut down after 4:40 Minutes. Tried to drain oil from crankcase w new filter system in place. NO LUCK no oil drain when I opened nut on the bottom. For you turbo guys...your thoughts??? I USUALLY had LOW oil pressure before....
Recommendations??? tried to follow ALL instructions faithfully but did the job alone and am NOT an AEROVEE builder..
Any help would be greatly appreciated.. Any one near Zepherhills FL????
Jack Leidenheimer
SonexN369UR

Posts: 15
Joined: Wed Jun 22, 2011 4:10 pm
Location: Tampa Bay Area, Fly out of Zephyrhills Florida.

To drain the oil from the new filter I always take the oil separator return line off and drain from there. I have to remove that fitting anyway to get to the acorn nut on the filter housing. Oil pressure on my turbo went from 40 to 42 psi up to 50 psi in cruise. In cold weather I will see 75 to 80 psi on initial start up until the oil heats up to 70 plus degrees. I have had bad luck with the VDO senders and on my third one at 360 hours. I added a mechanical oil pressure gauge and rely on it for pressure readings. The new sender and the mechanical seem to be close for now but I don't trust it yet. If your pressure reading is correct and remains high when the oil temp gets to 100 or more you may have a problem with the rear oil control spring or it's plunger, they may be to tight or stuck.