Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to change glow plugs [title] Find the glow plugs in the engine compartment. [substeps] They are usually on top of the cylinder head. [title] Remove the glow plug wires.

Ending1: [step] This appear from the first glow plug casing. [title] Remove glow plugs by prying them up. Ending2: [title] Plug each glow plug into a hd socket. [step] Use a socket wrench to tighten each glow plug into place. Ending3: [title] Unplug the glow plugs. [title] Pull the plugs out with ignition. Ending4: [substeps] The glow plug wires are beneath the engine's valve covers. You will find one end attached to the top of the glow plug and the other attached to the engine.

Answer format: ending1/ending2/ending3/ending4