Hi Guys,
Calling on engine people!
We found 3 of 4 cylinders were wet around the inlet valve guide in an IO360 after pouring a not-insignificant amount of oil out of the main engine intake tube (before it branches off to individual cylinders).
Pulled all 4 jugs off and sent them to the a local engine shop.
They all come back with pretty paint, 4 new pistons, few new valves springs, new exhaust valve, new rings and a big $$$ bill. They say we did not replace any of the intake guides as they'd already been done once, can't do again and they looked fine and within the Lycoming tolerance.
We put all the jugs back on. We go flying. 2 hours later, check intake and it's got a puddle of oil in it again.
The engine shop claims it cannot be the inlet valve guides leaking as any oil would be sucked into the cylinder and burnt. There is no way it can be in the intake.
We are now 11 hours after the engine overhaul, been running high power settings for a long period to brake-in the engine per their recommendation, with no sign of improvement.
Interestingly enough, we only lost 0.5qt of oil in these 11 hours..
Attached pictures of the ground below the aircraft, as well as the intake tube
https://ibb.co/ryN7Hyb
https://ibb.co/2tCNmkf
https://ibb.co/dKm3k3N
https://ibb.co/zNZZZss
https://ibb.co/7pY5jZ8
https://ibb.co/2vFYR2q
Open to suggestings and ideas
Many thanks,
Calling on engine people!
We found 3 of 4 cylinders were wet around the inlet valve guide in an IO360 after pouring a not-insignificant amount of oil out of the main engine intake tube (before it branches off to individual cylinders).
Pulled all 4 jugs off and sent them to the a local engine shop.
They all come back with pretty paint, 4 new pistons, few new valves springs, new exhaust valve, new rings and a big $$$ bill. They say we did not replace any of the intake guides as they'd already been done once, can't do again and they looked fine and within the Lycoming tolerance.
We put all the jugs back on. We go flying. 2 hours later, check intake and it's got a puddle of oil in it again.
The engine shop claims it cannot be the inlet valve guides leaking as any oil would be sucked into the cylinder and burnt. There is no way it can be in the intake.
We are now 11 hours after the engine overhaul, been running high power settings for a long period to brake-in the engine per their recommendation, with no sign of improvement.
Interestingly enough, we only lost 0.5qt of oil in these 11 hours..
Attached pictures of the ground below the aircraft, as well as the intake tube
https://ibb.co/ryN7Hyb
https://ibb.co/2tCNmkf
https://ibb.co/dKm3k3N
https://ibb.co/zNZZZss
https://ibb.co/7pY5jZ8
https://ibb.co/2vFYR2q
Open to suggestings and ideas
Many thanks,
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