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Doing my 9th annual inspection and looks like I have a burnt exhaust valve on Cylinder 6.
Lycoming YIO-540-D4A5 purchased through VANS. Has about 900 hr on it.
Last condition inspection #6 compression was 76/80, (all cylinders were 76-78)
Current compression all except #6 still in 76-78 range. #6 was 25.
Took this picture with a boriscope.
Never really done any engine work before, and getting a local A&P involved to help me, but from my research so far it appears that it is a quite burnt exhaust valve. Articles I have read say if valve is GREEN is NO-GO and the cylinder needs removed and valve replaced, not just lapped in place.
Just want to confirm that before pulling the cylinder.
Also does anyone have a good source for replacement cylinders. pilotshop, aircraft spruce, etc don't seem have them in stock.
Or would you normally pull the cylinder and then send it to an overhaul shop and wait for it to be returned? Or other options?
Normally would you just replace the cylinder, or also the piston assembly.
Lycoming YIO-540-D4A5 purchased through VANS. Has about 900 hr on it.
Last condition inspection #6 compression was 76/80, (all cylinders were 76-78)
Current compression all except #6 still in 76-78 range. #6 was 25.
Took this picture with a boriscope.
Never really done any engine work before, and getting a local A&P involved to help me, but from my research so far it appears that it is a quite burnt exhaust valve. Articles I have read say if valve is GREEN is NO-GO and the cylinder needs removed and valve replaced, not just lapped in place.
Just want to confirm that before pulling the cylinder.
Also does anyone have a good source for replacement cylinders. pilotshop, aircraft spruce, etc don't seem have them in stock.
Or would you normally pull the cylinder and then send it to an overhaul shop and wait for it to be returned? Or other options?
Normally would you just replace the cylinder, or also the piston assembly.