Spark plug replacement on Fiat 500 1.2 69cv

Open the engine hood

I use a 1/4 ratchet, an extension and a 10mm socket to remove the air box.

Locate the 2 fixing screws

Before working on the spark plugs, disconnect your battery

I proceed cylinder by cylinder in order to avoid any errors in the direction of the ignition cables.

Disconnect the ignition wire at the coil and spark plug.

We can see the candle at the bottom of the well

For loosening I use a 1/2 ratchet, an extension and a 16 mm LONG socket.

Place the tool and loosen the spark plug

The candle is placed

Compare the new spark plug with the old one

I replace the spark plugs with Febi Blistein brand spark plugs equivalent to the original ones.

He recommends a tightening between 15 and 25 nm and a spacing at the electrode of 0.7 mm.

I use a set of shims to check the spacing

Check the gap

Place the spark plug into the 16mm LONG socket

Tighten the first turns by hand so as not to damage the thread, then finish with the torque wrench to the recommended torque.

15-25 NM

Replace the ignition harness on the new spark plug and ignition coil.

Proceed in the same way for the other 3 cylinders

Replace the air box and finish by tightening the 2 10 mm fixing screws.