crack in engine block?

[fixkick]

a good shop for engines does all that.
vacuum
compression.
fuel pressure. at spec keyon and at idle. per FSM book. factory service manual.
timing,. cam and spark
and lash set.
find any leaks, and hoses ready to fail or belts near failure full of cracks.
best is not drive a car that overheats, more damage is sure increase.

cheers to you,!