Hi all,
I recently discovered a small crack in the crankcase of my IO360 A1A which was seeping oil. So I removed the engine and did a complete disassembly and rebuild with a new crankcase. The only other work entailed grinding the valves and cleaning the pistons and cylinder heads of the carbon that had built up. Now the engine starts and runs perfectly as it always has done BUT and it's a big but, the oil pressure and temperature are way off the normal figures that I had become used to i.e. - 55psi/ 220? instead of the previous 75 psi/ 175?. in cruise at 2000ft OAT 15?c/60?f at 140 kts.
I have changed nothing on the baffles or oil cooler installation.
I have added the maximum permitted number of washers to the oil pressure relief valve to try to bring the pressure up to normal. I checked the Vanatherm valve in boiling water and it "opens" by 0,165 in.(Is that enough?) So apart from an oil cooler that has suddenly become clogged (and why would that happen?) I'm running out of ideas.
Any information or ideas would be very much appreciated.
Mike
I recently discovered a small crack in the crankcase of my IO360 A1A which was seeping oil. So I removed the engine and did a complete disassembly and rebuild with a new crankcase. The only other work entailed grinding the valves and cleaning the pistons and cylinder heads of the carbon that had built up. Now the engine starts and runs perfectly as it always has done BUT and it's a big but, the oil pressure and temperature are way off the normal figures that I had become used to i.e. - 55psi/ 220? instead of the previous 75 psi/ 175?. in cruise at 2000ft OAT 15?c/60?f at 140 kts.
I have changed nothing on the baffles or oil cooler installation.
I have added the maximum permitted number of washers to the oil pressure relief valve to try to bring the pressure up to normal. I checked the Vanatherm valve in boiling water and it "opens" by 0,165 in.(Is that enough?) So apart from an oil cooler that has suddenly become clogged (and why would that happen?) I'm running out of ideas.
Any information or ideas would be very much appreciated.
Mike