Quote:
Originally Posted by Old Henry
Knocking is reduced by pulling the sparkplug wire on either 1 or 5 and totally eliminated by pulling both.
What does it all mean?
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Sounds like the bearing and / or crank journal is poopy in that location as both of those rods are connected to the same journal. If this is the case, the crank and rods will need to be properly reconditioned. For that, you will need to remove the engine.
If this engine was "rebuilt" by the same guy that "rebuilt" it in the past I'd strongly advise you have ALL of the rods and journals checked by a professional.