frankh
Well Known Member
Morning all.
I have a problem that appears to be getting worse and with the annual coming Up I really need to address it.
A couple of years ago I noticed that the oil pressure would dip when I applied full power..For example if I was doing a missed approach the oil pressure would be sitting at say 65psi on the glide (12" mp, low RPM), then drop to 45 to 50psi as I applied full power (2700RPM). This would happen for a few seconds then recover to 65psi at full power. I didn't do anything about it, but have been "keeping an eye on it".
This problem appears to be getting gradually worse and with the annual due its probably time to look into it. I did pull the horizontal suction screen about two years ago and notice that the 45 deg adjustable take off did not have a set screw it was free to rotate (although the hose prevented this from happening)
I am wondering if the slight movement of the adaptor has caused a small air leak (parts fretting slightly) and this is causing the the pressure to drop as it the pump is suddenly forced to increase speed.
I am thinking of first of all getting a new set screw and locking in place plus slathering some RTV over the fitting to plug any leaks..I guess I could also by pass the oil valve if that didn't fix it.
This has been a "feature" since day 1 and I noticed the oil pump would always lose its prime if the engine was left to sit overnight. I "cured" that by fitting an accumulator.
Thoughts?
Thanks
Frank RV7a IO360
I have a problem that appears to be getting worse and with the annual coming Up I really need to address it.
A couple of years ago I noticed that the oil pressure would dip when I applied full power..For example if I was doing a missed approach the oil pressure would be sitting at say 65psi on the glide (12" mp, low RPM), then drop to 45 to 50psi as I applied full power (2700RPM). This would happen for a few seconds then recover to 65psi at full power. I didn't do anything about it, but have been "keeping an eye on it".
This problem appears to be getting gradually worse and with the annual due its probably time to look into it. I did pull the horizontal suction screen about two years ago and notice that the 45 deg adjustable take off did not have a set screw it was free to rotate (although the hose prevented this from happening)
I am wondering if the slight movement of the adaptor has caused a small air leak (parts fretting slightly) and this is causing the the pressure to drop as it the pump is suddenly forced to increase speed.
I am thinking of first of all getting a new set screw and locking in place plus slathering some RTV over the fitting to plug any leaks..I guess I could also by pass the oil valve if that didn't fix it.
This has been a "feature" since day 1 and I noticed the oil pump would always lose its prime if the engine was left to sit overnight. I "cured" that by fitting an accumulator.
Thoughts?
Thanks
Frank RV7a IO360