your car is fine.. 0kr all the time is not hard to achieve even on accident.
As far as hitting the motor with a hammer goes... it will not work unless you are driving down the road and you can hit it at the perfect time, alot of times in a row.
I have to agree with the second part of this.. I was NOT able to get my car to knock just by hitting the motor/oil pan/headers/crossover with ANYTHING.. Even tried doing it with the Car in Drive.. Nothing...
97 GTP Sold-prolly rusted away by now
2011 F-150 Yote powered
Too Hot to Handle, Too Cold to Hold