• Dec 23, 2025 bmw e46 318i engine swap instructionguru com e Transfer necessary components from the old engine (e.g., sensors, intake manifold) unless planning a full swap. Check the new engine for any shipping damage or issues. 9. Install the New Engine Lower the new engine into the bay carefully. Align and secure engine mounts. Reattach all bolts, sensors By Bridget Kemmer II
