DesperadoPilot
FRIEND
Brazoria, Texas
Brief Synopsis of Problem:
Lycoming 0-235-C1.
Fairly new engine, approximately 30 hours SMOH.
Ran fine with full 6 quart oil capacity with no leaks. Breather vent never even had a drip. Landed one day and belly was covered with oil. Not a drop of oil was in the baby bottle. Isolated the leak at the front crankshaft oil seal. Replaced seal. Ensured the oil sump was full with 6 quart capacity as usual. After a 20 minute warm up, no leaks on the ground. After a test flight staying in the pattern with three touch and goes, the belly was covered with oil. This time the front seal did not leak, but the baby bottle was full of oil and the belly was covered with oil again. With the baby bottle full of oil, the crankcase vent tube had blown a lot of the oil out of the top of the baby bottle and it was all over the belly all the way back to the tail wheel. Checked the oil it had 5 quarts left in the sump, so it blew a full quart of oil out on three touch and goes.
I pulled all four bottom plugs and all four of them were pink and dry, not a trace of oil on any of the plugs. Any idea's, thoughts, or suggestions? Thanks in advance.
Lycoming 0-235-C1.
Fairly new engine, approximately 30 hours SMOH.
Ran fine with full 6 quart oil capacity with no leaks. Breather vent never even had a drip. Landed one day and belly was covered with oil. Not a drop of oil was in the baby bottle. Isolated the leak at the front crankshaft oil seal. Replaced seal. Ensured the oil sump was full with 6 quart capacity as usual. After a 20 minute warm up, no leaks on the ground. After a test flight staying in the pattern with three touch and goes, the belly was covered with oil. This time the front seal did not leak, but the baby bottle was full of oil and the belly was covered with oil again. With the baby bottle full of oil, the crankcase vent tube had blown a lot of the oil out of the top of the baby bottle and it was all over the belly all the way back to the tail wheel. Checked the oil it had 5 quarts left in the sump, so it blew a full quart of oil out on three touch and goes.
I pulled all four bottom plugs and all four of them were pink and dry, not a trace of oil on any of the plugs. Any idea's, thoughts, or suggestions? Thanks in advance.