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Cylinder replacement...... DANGER! DANGER!

The mechanic that pulled the cylinders off of my O-360 for a top overhaul didn’t know what a torque plate is.


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Never seen them before either....


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There is a lycoming part number for them. I’ve seen them mentioned in one of the manuals. Lycoming one is horrendously expensive. I had to pull the cyl on a 66 hr engine. I didn’t want to risk anything. I read(online so take it with a grain of salt) the problem comes from pulling the cyl and then turning the prop you could spin a bearing. I’ll be using the plates from here out. Plus the the 66 hr engine I sent the nickel coated cyl back to the manufacture to hone. Figured I had no idea how long the cyl would be off for, can’t be good leaving it sit without the torque for long? Who knows.


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There is a lycoming part number for them. I’ve seen them mentioned in one of the manuals. Lycoming one is horrendously expensive. I had to pull the cyl on a 66 hr engine. I didn’t want to risk anything. I read(online so take it with a grain of salt) the problem comes from pulling the cyl and then turning the prop you could spin a bearing. I’ll be using the plates from here out. Plus the the 66 hr engine I sent the nickel coated cyl back to the manufacture to hone. Figured I had no idea how long the cyl would be off for, can’t be good leaving it sit without the torque for long? Who knows.


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If your case moves that much to unlock a bearing from the lock recess when a cylinder comes off...........ummmm...


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