mechanics r morons!! i need help!!

[singlecamhonduhkilla]

i freaking finally thought my car would be done.. but the morons didnt fix my new engine instead just replaced my broken motor with the newer motor that i brought then that wasnt working correctly.. and there was a hella loud knocking from it.. so i had take the valve cover off and the back left lifter was the problem.. it seems the the bolts to the lifter in the back were stripped.. and that was the knocking. now.. if they got the new bolts on there what else could be the problem.. it started up great with the exception of that hard knock.. i told them to check everything else but idk.. what do u all think??joe

[Aries]

lifter > rocker arm > timing chain

[singlecamhonduhkilla]

checked the timing chain.. that was suprising good..but the back lifter to the left was stripped(the bolt)... but theyre gonna check againjoe