Coolant in cylinder after storage
in 912 / 914 Technical Questions
10 years ago
I have a 1300 hour 912ULS from a wind-damaged 2008 Remos that will have a new life in a homebuilt. The engine sat for a year, and when I got it had about 1/4 cup of coolant in #2 cylinder. The sparkplug electrodes were rusty. There is no visible water in the oil drained from the tank. The engine was hydrolocked due to the water but I doubt that anyone had tried to start it (the nosewheel was trashed in the wind damage, so there would have been no room for the prop to turn although the prop does not appear to have been damaged.) The top of the piston and cylinder walls look OK with a borescope, I'll pull the cylinder head off soon. The 3 other cyls look OK and have some compression. Otherwise the engine looks OK, logs show regular 100 hrs and SB compliance by the same A&P since new.
The engine is one of the 1500 hr ones that can be upgraded to 2000.
Can this be anything other than a crack or corrosion pinhole in the head? Anything to do but find a replacement head? Should I try to clean up the cylinder and run the engine as is?
The engine is one of the 1500 hr ones that can be upgraded to 2000.
Can this be anything other than a crack or corrosion pinhole in the head? Anything to do but find a replacement head? Should I try to clean up the cylinder and run the engine as is?
