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Re: 39 M stiff area in motor when cranking


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Posted by mkirsch on October 03, 2011 at 05:14:09 from (64.80.110.75):

In Reply to: 39 M stiff area in motor when cranking posted by BUCK CLAYTON on October 01, 2011 at 20:45:52:

You said there was a stiff spot every turn of the WHEEL.

Even in 5th gear, the engine has to rotate several times to make the wheel go around once. That means the stiff spot you're feeling is in the TRANSMISSION, not the engine.

Unless you can crank the engine directly by hand from the front, you can't even confirm there is a "stiff spot" in the engine.

The starter will lug down and struggle to get the cylinders past compression, every 1/2 revolution. That's perfectly NORMAL, if the starter isn't in the best shape, or the battery cables need work.

Get out the hand crank and turn the engine over from the front before you panic and start tearing into the bottom end looking for bad bearings and bent rods.


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