please help engine knocking
 

well i had my supra for a couple of days, and when i was driving it started making a knocking noise, it gets louder as the rpm's go up but when i put in the clutch the noise goes away, what can this be? The engine is a 7mgte from a 1987 supra turbo thanks

could be your injectors not spraying evenly, or cam shaft. try using 20w-50 castrol oil. however, it may only be a temporary fix.