BGS
Well Known Member
Having issues with a high oil pressure indication and looking for some help in troubleshooting.
Engine is a IO-540, built by Firewall Forward. Has 250 hours since OH.
Last weekend during preflight run, notice that oil pressure reading 90 lbs at 1800 RPM. Brought back to idle and it dropped to around 75-80. Ran back up to 2000 RPM and it pegged at 99 lbs.
Back at the hangar, was hoping it was an indication issue so replaced the oil pressure sensor. Started back up, reading at first was at 50 lbs at idle and during run up it stayed quite normal. After takeoff the pressure rose again and was over 90 lbs. Did pattern and landed.
At the hangar again, removed cowl and decided to drop the oil. Found a few pieces of metal in the oil but they were stuck in the sump screen and had to be picked out with a pick. Pretty sure they were there in the beginning.
Was still thinking it was an indication error so decided to install a new oil temporary oil pressure gauge in. Once competed did another run and the pressure seemed to be just fine. Ran up to 2100 RPM and it seemed to be normal. After about ten minutes of sitting, we decided to do a double check. This second run up indicated high pressure again.
Couple of thoughts:
Appreciate any comments or help.
Engine is a IO-540, built by Firewall Forward. Has 250 hours since OH.
Last weekend during preflight run, notice that oil pressure reading 90 lbs at 1800 RPM. Brought back to idle and it dropped to around 75-80. Ran back up to 2000 RPM and it pegged at 99 lbs.
Back at the hangar, was hoping it was an indication issue so replaced the oil pressure sensor. Started back up, reading at first was at 50 lbs at idle and during run up it stayed quite normal. After takeoff the pressure rose again and was over 90 lbs. Did pattern and landed.
At the hangar again, removed cowl and decided to drop the oil. Found a few pieces of metal in the oil but they were stuck in the sump screen and had to be picked out with a pick. Pretty sure they were there in the beginning.
Was still thinking it was an indication error so decided to install a new oil temporary oil pressure gauge in. Once competed did another run and the pressure seemed to be just fine. Ran up to 2100 RPM and it seemed to be normal. After about ten minutes of sitting, we decided to do a double check. This second run up indicated high pressure again.
Couple of thoughts:
- Is the oil cooler or lines blocked. However, did not show any high oil temps.
- Was there something wrong with relief valve. Removed and had an A&P inspect. Seemed to be normal.
- Did the engine spin a bearing and that is causing the blockage. Debating removing a cylinder to scope.
- ?????
Appreciate any comments or help.