Replaced Water Pump,
Join Date: Aug 2009
Location: New Zealand
My advice would be no. What is critical is the clearance between the big end journal and the shell as this is what allows the thin hydro-dymanic layer of oil to form and it is upon this film that the journal 'floats' when rotating. For this film to be preserved requires the journal (and shell) to be smooth, parallel, round, with the correct clearance which generally is around the 0.0005" to 0.002" range. Knocking means that the film is being destroyed and metal to metal contact ocurring, due to one or more of these factors being incorrect. Sanding enough to remove the scoring (even light scoring) will remove a significant layer of metal given the fine tolerances required with shell bearing clearances and further increase the clearance. It won't do anything for concentricity, straightness, etc either. So it won't fix the knock and may make it worse.
Darryl in New Zealand
Last edited by KiwiAlfa156; 15-04-10 at 03:13.