1. rdrgz_ezekiel

    rdrgz_ezekiel New Member

    hey yall im re-building my tahoes 350 and i was wondering 2 things. first can i re use my head bolts or should i buy new ones, and what oil should i use to break it in

    i appreciate the help
  2. Pikey

    Pikey Moderator Staff Member 5+ Years ROTM Winner 5000 Posts

    New heads bolts, Always! As far as break in oil, someone else will have to answer that.
  3. WorthFlorida

    WorthFlorida Rockstar 4 Years 100 Posts

    You MUST use break in oil. It contains zinc and without it you'll toast the engine in matter of minutes. http://www.royalpurpleconsumer.com/products/royal-purple-break-in-oil/

    The old head bolts cannot be used because they have actually stretched and distorted. After a few thousand heat soak cycles they get tempered. New bolts will give the best performance to evenly camp the head down and after spending a lot of money on the engine you don't want a blown head gasket down the road. Each time you torque any bolt, you are stretching it and it really never comes back to it's original length on a removal.

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