"does a BHG always mean a warped or damaged head?"
No, not always. It depends how long the vehicle has been driven with a leaking or blown gasket. My head was perfectly straight but I caught mine very early. Most people just keep driving it and driving it until it finally doesn't run anymore.
You'd be surprised how long these engines can run with a leaking head gasket. I'd bet mine was leaking for years until it finally blew.
As far as machine work, I suggested it in your other post. Why? Well heres some food for thought, how would you feel if you ripped the head off, cleaned everything, spent alot of money on tools and gaskets, reassembled it and it still was leaking because the head is warped and all you had to do was pay $80-$100 to have it cleaned checked and planed? Any professional mechanic would send the head to a machine shop. Only hacks take it apart and slap it back together.
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