How to Replace the Glow Plugs on an Alfa Romeo 147

To replace the glow plugs on the Alfa Romeo 147, go directly to minute 3:05 of the video, as the first part shows how to identify which glow plug to replace; then, start the engine and let it reach a temperature of 90°C; once at this temperature, turn it off, disconnect the battery, and remove the upper part of the engine (where it says Alfa Romeo).

After removing the upper cover, unscrew the bolt of the bracket on the side of the upper part of the engine to create some space.

Using a series of extensions and a socket, unscrew the first glow plug on the right, insert the new glow plug, and screw it in; now move to the second one from the right, which can be accessed by moving the pipe after unscrewing the bracket bolt. You will find the second glow plug under the recess, unscrew it, and with a series of extensions and a socket, insert the new glow plug and screw it in; for the third and fourth glow plugs, disconnect the connector near the fuel filter and the two bolts close to the filter.

After unscrewing this part, unscrew the last two glow plugs with a series of extensions and a socket, insert the last two new glow plugs, and screw them in. After screwing in the last two glow plugs, reassemble everything, reconnect the battery, start the car, and check if the glow plug warning light has turned off.