Quote:
Originally Posted by 700rpm
I wiped down the cylinders and here is what I found: minor vertical scratches on #3 (bare felt with a fingernail); some brown staining and what look like random scratches on #4, visible perhaps in the photos; a very slight carbon ridge on the top of #3, again just barely enough to catch with a fingernail. The worst of the valve seats is #5, though maybe even that is salvageable (I could try seating a valve there and seeing what happens). Overall the cylinders are not as bad as I first thought, but what are you all seeing now?
I plan to replace all valves with new, at least, but I don't know what else from there.
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If you replace all the valves with new you will have to do the seats also. The new valves probably won't seat properly because the seats are ground by the guides. Just like machining a piece in a lathe, you can never take that piece out and put it back in EXACTLY the same way. If you just removed the existing valves and didn't mark them and the holes they came out of, you have this in front of you anyway. Now, if you marked them and can replace them in their respective holes, you can get a lapping tool and some lapping compound at the auto parts and lap the valves to get as good of a job as you can do with the new stuff. You might get lucky and be able to lap the new valves but you might not.