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Thread: refacing auto valves on a lathe
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28th June 2011, 11:51 PM #1
refacing auto valves on a lathe
I have a old Lincoln DC welder driven by a Holden 179 red motor. I bought it in a sad state.
The head on the motor was a mess ..rusty stuck valves and the seats corroded . As it's only a stationary engine, I did a budget rebuild of the head.
The valves I refaced in the Sheraton lathe . I am a total newbie to this .. After experimenting I found the best speed was the slowest I could get , about 60 RPM with back gear engaged . I don't have fancy collets , I dialed them in in a 4 jaw chuck . I made a facing tool and it worked very well. I set it to 45 degrees approx. The valves were not as hard as I thought and they cleaned up great .I had to remove a fair bit as they were badly grooved .
I used a stone to grind the seats , by hand , then some lapping with paste
The engine runs well now.
Mike
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29th June 2011, 09:32 AM #2SENIOR MEMBER
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HI,
My Brother done His Toyota Hilux 18R Motors Valves on the Myford Lathe at Work Years ago. He used a Toolpost Grinder to face the Valve and then Borrowed some Stones to Grind the Valve Seats it worked well. Here is some Links for You and any one else interested
http://www.wewilliams.net/docs/1925%...%20No%2086.pdf ,
http://www.wewilliams.net/docs/1936%...letin%201A.pdf,All The Best steran50 Stewart
The shortest way to do many things is to do only one thing at once.
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