today I was on the highway and was doing about 190 km/h. I got off the highway and noticed that my oil light was on and as I was driving whenever i would go above 3000 RPM and I would head knocking from the motor. I was like wtf? then i started to go again but from start to 3000 rpm no knock, above 3000 there would be a knock. Now what Im thinking happened is that cause I was going pretty fast and I was low on oil then the speed of the valvetrain wasnt getting lubed enough? so what do you guys think the problem is:
rockers?
valves?
spun a bearing?
piston?
etc

 

Spun a bearing, time for a fresh bottom end.

 

wouldnt a spun bearing sound like grinding metal?

 

Rod bearing.

 

No, a spun bearing is definetly a knocking sound, I spun a whole slew of mine before.

 

a spun bearing will knock