You need the socket. An auto parts store may have a b/j socket kit for loan or rent or purchase. Avoid heating the control arm as this may change or weaken the temper of the metal. Follow the procedures and torques listed in the service manual.
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http://www.autobodytoolmart.com/sk-34-drive-ball-joint-impact-socket-2-18-84689-p-24695.aspx