my motor has a heavy knocking when under a load.What can be the cause and remedy on 2000 Jeep Grand Cherokee

motor starts knocking as I race the motor

3 answers 1 comment
Get it diagnosed by an experienced mechanic , depending on the cause of the noise , then decide what you want to do. May be a five minute tightening of a loose component , or it may be an internal engine failure. Have you checked the oil?
I agree with#1 it sounds like it could be a rod bearing
agree with #1
I agree with #2 , #1 is an ................never mind..........