08-12-2011, 05:17 PM
So the engine is quite until it reaches 75 then it starts to make a knocking/ lefter noise at around 3000/6000rpm. The motor was running good until I did a oil change. I put in 10w40 syn. I can't really recall the sound being there before the oil change. Either way does any know if this is oil? Needs a valve job? Or should I go ahead and buy a new engine when this one blows up. I don't really beat on it, just drifts and 1st endos to the limiter. Any suggestion would be helpful before I start spending money. Thnaks.