Posted by wore out on March 03, 2021 at 10:41:42 from (64.255.159.199):
In Reply to: 8n valve adjustment posted by Grandpa love on March 03, 2021 at 09:47:16:
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Starting at the beginning, your tractor has "mushroom" valve stems which require "split" valve guides.
Nowadays the split guides are more or less obsolete.
When you replace the valves and guides you will have the option to get a set with or without valve rotators, your choice. Get the valves, guides, springs, retainers, keepers, etc. as a complete set.
Do NOT mix and match valve springs between the original, replacement, or replacement with rotator as they vary in length.
Getting them as a complete set will (hopefully) eliminate a mixup there.
The valve lifters ("tappets") can simply be lifted out of their bores and replaced with new, adjustable ones.
Put some "cam lubricant" on the cam face of the tappets before installing.
On the other hand, if you are doing this on the "cheap" to "flip" it, you could put everything back as it was and get one new split guide, should be able to find a "NOS" one on the 'net.
In that case, HOPEFULLY you kept track of where each valve assembly came from, and put them back as they were (due to grinding the stem being the only way to adjust tappet clearance).
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