CorvAircraft> Bearing Shells

[Dave Morris "BigD"]

I don't understand why there are sharp edges on the bearings.

Dave Morris

At 10:55 PM 1/24/2007, you wrote:
>Hello again Vairheads,
>A little more info about the worn bearing surfaces tonight:
>Just finished torquing the case halves together without the crank 
>installed. I observed the bearings shells not mating flush at their 
>seams at the top and bottom, leaving sharp edges. Sharp edges wear 
>on the crank surfaces, and collect debris and other contaminants to 
>compound the wear. Other sharp edges on the shells are formed by the 
>square corners which result from making the oil grooves and the 
>locating tangs. These portions of the shells don't mate well, 
>either. The crank has wear marks where these sharp edges contact it. 
>I may practice on deburring these edges on some of my old bearing 
>shells before attempting the process on new ones.
>Tomorrow night I will open the oil filter.
>Tom Cummings
>Sulphur, La.
>_________________________________________________________
>search the CorvAircraft archives at 
>http://www.maddyhome.com/corvairsrch/index.jsp
>to UNsubscribe from CorvAircraft, send a message to 
>CorvAircraft-leave at mylist.net
>Other CorvAircraft list info is at http://www.krnet.org/corvaircraft_inst.html