Here is my situation:
61 apache 10 with 235.
Knocking sound if revved up.
Dont use oil or smoke. Oil pressure good, but drops at idle when engine is warm.
Knock disappears if spark wire for no 5 is removed. So problem is with no.5. Actually sounds very good without no.5!
Could this be a rod knock or a wrist pin problem?
Can i remove that piston no 5 from underneath after oil pan is removed? Can I replace just piston no.5?
Thanks for your ideas.
