Loud knocking?
 

hey everyone i am new to this forum and i have a 2001 grand prix 3100 sfi motor. it has a loud knocking sound coming from inside the motor on the right hand side someone told me it might be a lifter but i wanna try to make sure before pulling off the head or is it easier/cheaper to swap a other motor in there i found one for 650 with 100 km

Check with the dealer.