200K miles is in the border of its life-meaning an engine rebuild
Where is that knocking coming from the engine- Is it clacking, tapping or more like a thumping or bumping.
Can be a valvetrain, engine bearings, clogged oil galleries, and weak oil pump that the oil is not reaching all the way up.
Sometimes Doing an engine flush thouroughly might help.
What is the OBD2 code
Have the knock sensor check and ignition timing
HTH Good Luck!
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Sunday, January 7th, 2007 AT 4:33 AM