Jimboscr
Well Known Member
Hi everyone. I am looking for the collective wisdom of the group to help with a HIGH oil pressure problem I have been having. First the facts. I have an IO-360 fuel injected Lycoming in my RV8 that has a total time of 44 hrs. It has been running fine, within the pressure parameters although it has been on the higher side of normal (85 - 90 Psi). However now I have been experiencing very high pressures (120 Psi) whenever the throttle is pushed forward, mainly on take off. I should also mention I am in Australia where it is definitely Summer at the moment and the ambient air temperature is hovering anywhere from 80F - 110F.
So far I have done the following: (according to the Lycoming trouble shooting lists)
1/ Checked the pressure relief valve, the ball bearing is smooth and shiny and there is no evidence of sticking (it is only 44 hrs old)
2/ checked that the pressure relief channel is clear by using the Lycoming suggested copper wire. It is clear.
3/ I am using the correct grade of oil.
4/ However when I looked at the oil temp I found that it was quite cool. When I sat on the ground and ran the engine for about 15-20 min the oil finally got up to the correct temp and the pressure problem seemed to go away.
So my question is: Does this mean that my Vernatherm is stuck in the open position, thus constantly directing the oil to the oil cooler and not allowing it to warm up enough and its this higher viscosity oil that is causing the oil pressure to be to high?
I am going to pull it and do a temp check on its operation, but I would like the Engine Gurus to give me their opinions, and comment on wether my reasoning is correct or not.
Thanks in advance. Cheers
Jim
So far I have done the following: (according to the Lycoming trouble shooting lists)
1/ Checked the pressure relief valve, the ball bearing is smooth and shiny and there is no evidence of sticking (it is only 44 hrs old)
2/ checked that the pressure relief channel is clear by using the Lycoming suggested copper wire. It is clear.
3/ I am using the correct grade of oil.
4/ However when I looked at the oil temp I found that it was quite cool. When I sat on the ground and ran the engine for about 15-20 min the oil finally got up to the correct temp and the pressure problem seemed to go away.
So my question is: Does this mean that my Vernatherm is stuck in the open position, thus constantly directing the oil to the oil cooler and not allowing it to warm up enough and its this higher viscosity oil that is causing the oil pressure to be to high?
I am going to pull it and do a temp check on its operation, but I would like the Engine Gurus to give me their opinions, and comment on wether my reasoning is correct or not.
Thanks in advance. Cheers
Jim