Posted by jonathan mirgon on March 16, 2009 at 03:58:30 from (4.225.98.179):
In Reply to: Farmall M Knock posted by cessnapilot3@gmail.com on March 15, 2009 at 20:43:51:
I am not real familiar with the m , But unless I stand to be corrected you will need to remove the engine completely from the tractor , Also removing the fly wheel etc in order to get the crankshaft out. It sounds like someone put a band aid on a bullet wound. Putting new bearings onto a crank that is not true will never give any good results. I would not continue to run the tractor as it is possible that you could end up putting a rod through the side of the block and then you will have an even bigger problem. As far as checking which one is knocking , I have never heard of the short a plug method out ? If it were a main bearing knocking this would not yield any results as everything is still turning, The rod bearings would also still be turning but with less force on the one in question. In my opinion , If you have one that is bad , Chances are the rest of the bearings and crank journals are not in much better shape. If it were mine I would remove the crank and send it to the machine shop and replace all rod and main bearings with new undersize bearings. Also take a good loook at piston and liner wear , As well as valve and seat condition.
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