Does it go away under load?

 

Not sure. Kinda hard to hear it under load when I have LTs

 

Ok well its either a spun rod bearing, valvetrain noise, or a wrist pin

 

Im gonna drain the oil and look for metal shavings. Hopefully there aren't any and all I have to do is change the damn bearing.

 

bump for more input

 

Cut open the oil filter and check for contamination.

Casey

 

im pretty sure Whitefox nailed it, its gotta be 1 of the 3, did you use floating wristpins or press in?

 

I know which one i think it is.

 

He said the key words "back off the motor" "rattle" and "internal"

 

I don't think so.... Mine has been fixed for months and well over 5000 miles and it hasn't gotten any worse. I had a 94 Mark VIII that had the same type of knock that I drove for two years and it never hurt anything (That one was several bad lifters). What he is describing is EXACTLY like my issues.