Hi everyone, I'm about to pull the heads off a 93 camry to fix a blown head. I'll do both at the same time to prevent the other head blowing soon. The Haynes repair manual, which I found pretty good for the price, has no mention of using new head bolts at all, it says to clean the threads. However on the internet there is mention of new bolts being required. What are the official toyota guidelines regarding this? Thanks!