Posted by BLINDHAWG on May 04, 2008 at 06:21:26 from (68.155.127.119):
In Reply to: 640 VALVE GUIDES posted by BLINDHAWG on April 30, 2008 at 16:35:36:
Update: took the head to an automotive machine shop Friday. I was told that inserts that I bought wouldn't work, bores need to be drilled out and new inserts pressed in. $85 plus parts. Note that all the intake guides had an insert installed at some time. I assumed the the exhaust guides had be left alone other than knurling as were the intakes. What confused me in the beginning was the flat top intake ends and the pointed (like the new inserts)exhaust guides. I'm thinking now that the pointed end of the intake guides were machined off when the inserts were added. This leads me to believe that all have inserts 3/4 x 2-1/2" exactly like the ones I bought. I going to try to pound them out with a driver and hammer as instructed in the shop manual. We'll see!!
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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