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Originally Posted by suprabahamut
cre how do you tell if the pistons are moving can you look into the spark plug holes
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Twice I've said have someone watch. Another way that works well (sometimes better) is getting a dowel just large enough around that it'll stand upright in the sparkplug hole but still move up and down freely. Mark it with a pen somewhere you'll be able to tell the difference if the piston moves as much as 1/8". Turn the crank and watch the dowel to see if it moves up or down.
By now you could have already pulled the cam covers, the cams and valve buckets to see if a spring snapped or a keeper failed. Then all that would be left are pulling the oil pan and checking on the flywheel. I understand though, time's tight and you don't have all the tools?