O-320 Exhaust valve guide wear

[Wayne G. O'Shea]

Not how I like spending my Friday afternoons!

http://www.irishfield.on.ca/gallery/engine1.jpg

http://www.irishfield.on.ca/gallery/engine2.jpg

http://www.irishfield.on.ca/gallery/engine3.jpg

215 hours SMOH... run on nothing but 100LL. #4 was down to 58/80.... all
leakage air blowing (roaring) out the exhaust. Was going to try the rope
trick for a valve seat lap, and I started into that and got the springs
removed..... only to find that the exhaust valve to guide clearnance was
like throwing a wiener down a hallway.

Was told if one was that way..they probably all were, so I put the # 4 back
together to get an indication of how much the valve stem moved with the
spring/keepers installed and sure enough they are all about the same. Off to
the engine shop tomorrow for new guides and possibly valves. Thankfully I
have a couple sets of valves... so I know they won't be needed!

Wayne




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