Abstract: The present invention relates to a gas bolt heating apparatus for connecting to a heating tube and heating a bolt member. The bolt member has a bore. The heating tube is positionable within the bore. The heating apparatus includes a gas torch having a torch tip through which hot gas passes. The heating apparatus also includes a hollow heater body having a first end and a second end opposite thereof. The body has a central passageway extending from the first end of the body towards its second end. The central passageway is configured to receive the torch tip. The heating tube is connectable to the body. The torch tip is configured to extend into the heating tube for directly heating the heating tube when the heating tube is so connected to the heater body.