Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to pour babbitt bearings [title] Remove the old bearing. [step] Babbitt bearings are solid and must be melted off with an oxy-acetylene torch, available at hardware and building supply stores. Open the bearing case and melt off the old bearing, making sure you melt the retaining grooves and holes, as well.

Ending1: [substeps] Consult a contractor for help melting the bearings. Guide directions for melting the bearings should be noted on the bearing case packaging. Ending2: Collect the melted babbitt in a cast iron lead melting pot, available at welding supply outlets. Scrape remaining babbitt from the bearing case, grooves and holes and add them to the pot. Ending3: [substeps] Alternatively, you can glue the bearing case to a surface, such as a shelf in a garage or a potentially cool spot outside. [title] Soften the bearings with the melted babbitt. Ending4: [substeps] Once again, you need to melt off the old bearing, making sure you sink the bearing in the solvent and retaining notches placed on the outer plate. After melting it off, the bearings will be hazy and cloudy.

Answer format: ending1/ending2/ending3/ending4