Mark said, > "When did they start mixing walnut hulls in with Techron?"
I was using borrowed equipment and used (carefully) what was in it - glass beads. Walnut hulls are safer - as you mention in your tutorials - and would be my abrasive of choice if I bought a sand blaster. Those guides, btw, were still like new after more than 500 hours. I attribute that to Steve Bennett's wisdom in using swivel heads on the rocker arms. And the good fortune that the guide holes were drilled precisely. The picture of the R-2300 head is distressing. I've always had the highest regard for Joe and what comes out of his shop. I was reading the William Wynne dissertations on the Corvair recently while prowling around the Panther website. A well-built Corvair with an Ellison, an 0-200, or a GP 2180 with Ellison are all such good choices for planes of our size and speed. In each case it would be good to either build the engine from scratch or tear a used one down and start over. I've read even with factory fresh Continentals and Lycomings the machining of guides can be wonky leading to early valve failures which are then blamed on improper operation. Valve geometry is critical for having a dependable and long-lived engine and the only way to be confident of that is to take things apart and look. John Deakin and Mike Busch have both mentioned over time that you can't count on the factory to get this right, even with 60K engines. ____________________________________________________________ Old School Yearbook Pics View Class Yearbooks Online Free. Search by School & Year. Look Now! http://thirdpartyoffers.juno.com/TGL3141/558725388796b25383094st04vuc
