I think I broke my truck ...

[czarcaustic]

Hey guys. I had to really pour on the throttle the other day in a situation on the road, after slowing back down to normal cruising speed I noticed a new noise from under the hood. It was almost a ticking or scraping sound that increased and decreased w/ RPM.

I have attached a crappy (dark and iphone) video to hear the sound. I have also noticed white smoke out of the tailpipes now ... which was never an issue.

Any suggestions as to what I may have done? I can't tell any real difference in power ... but the noise and smoke are definitely new.

Old engine sound no smoke:

1971 GMC C1500 Longbed - YouTube

New engine sound w/ smoke (loud - turn speakers down):

whoops - YouTube