Join Date: Nov 2009
Location: georgia's toe-nails of the foot hills
Re: Help needed....Intek valve clearance
QUOTE RJW:" On these engines - which I am not familiar with I believe it will be easier to just replace the valves."
No, you will go through just as much effort to replace with new as you would adjusting the existing valves. Except, you would not have to clean new valves of carbon deposits, etc.
New valves should be lapped, and adjusted, just the same as old ones. The actual dimensions of the valve seats, cam followers/tappets, cam lobes, cam bearing wear/clearance, and variations in machining tolerance add up to indicate that whenever the valve train has some parts replaced, clearance should be checked and adjusted as needed. The valve stem on a new valve is at the maximum length, so will need to be adjusted to match the current valve length, and possibly need to have a trim.
If you watch the Indiana guy, Taryl Dactyl, he actually demonstrates adjusting the valves in his 'rebuild' of a Tecumseh. I do question whether the valves should be lapped before the adjustments are made, but I am not a professional, and have not read the manual... Anyway, if you watch his video on the Tecumseh, after the clowning, he does show the things that should be looked at, and the opposed twin engine is very similar in construction to the one he works on, just has another piston pointing the other way...
simplificate & add lightness
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