Rattling noise at high rpm's
 

Hey guys...

Just recently I noticed when I am driving hard and reach high rpm's (speed doesn't matter) there is a rattling sound of some sort coming from my engine bay. Sounds like marbles in a can. I tend to think it is detonation and asked my shop teacher and he said the same thing. I am guessing to put in high octane fuel....any other advice?

Thanks

Sounds like piston slap :No: :eek:

check your timing, you might be able to fix it that way, otherwise try higher octane and see if that helps.