Recommended replacement interval for the part category Spark plug : 8 year / 120000 km

Important!

This replacement procedure can be used for:
ALFA ROMEO 159 (939) 1.9 JTS (939AXA1B), ALFA ROMEO 159 (939) 2.2 JTS (939AXB1B, 939AXB11) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Spark Plug for 159 (939) and other ALFA ROMEO models

Spark plug

Spark plug for 159 Saloon (939) Petrol (160 hp)

Simple DIY car repair steps – Replacing Spark plug on 159 Saloon (939)

Spark plug for 159 Saloon (939) Petrol (185 hp)

Replacement: spark plugs – ALFA ROMEO 159 (939). Tools you need:

                        Electronic spray
                      
                        High-temperature anti-seize lubricant
                      
                        Drive socket # 8 
                      
                        Drive socket # 10 
                      
                        Spark plug socket # 16
                      
                        Ratchet wrench
                      
                        Torque wrench
                      
                        Flat Screwdriver
                      
                        Fender cover

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Replacement: spark plugs – ALFA ROMEO 159 (939). AUTODOC experts recommend:

The replacement procedure is the same for all spark plugs.
All work should be done with the engine stopped.

Replacement: spark plugs – ALFA ROMEO 159 (939). Use the following procedure:

Step 1

Open the hood.

Step 2

Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.

Step 3

Undo the engine cover screws (4 pieces). Use a drive socket #8. Use a ratchet wrench.
Step 4

Remove the engine cover.
Step 5

Detach the connector from the ignition coil. Use a flat screwdriver.
Step 6

Unscrew the ignition coil bracket. Use a drive socket #10. Use a ratchet wrench.
Step 7

Take out the ignition coil from the spark plug well.
Step 8

Clean dirt, dust and debris from inside the spark plug wells. Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.

Step 9

Take out the spark plugs.
Step 10

Install the new spark plugs into their mounting seats.
Step 11

Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 22 nm torque.

Replacement: spark plugs – ALFA ROMEO 159 (939). AUTODOC recommends:
Don't tighten the plugs with excessive force. Exceeding tightening torque can damage the thread connection. Be careful when working with a spark plug wrench. Its skewing can cause damage to the threaded connection.
Step 12

Treat the mounting seats of the spark plugs on the ignition coil. Use high-temperature grease.
Step 13

Install the ignition coil to the spark plug well. Make sure you hear a click indicating that it is locked in place.
Step 14

Tighten the ignition coil fastening. Use a drive socket #10. Use a torque wrench. Tighten it to 8 nm torque.
Step 15

Treat the ignition coil connector with electronic spray. The spray will protect the electrical contacts from corrosion, oxidation, and will reduce the contact resistance.
Step 16

Plug in the ignition coil connector.
Step 17

Install the engine cover and secure it. Use a drive socket #8. Use a ratchet wrench.

Replacement: spark plugs – ALFA ROMEO 159 (939). Tip from AUTODOC:
Make sure the engine cover is properly seated. It should not be displaced with respect to the guiding fasteners and the throttle body air intake hose.
Step 18

Run the engine for a few minutes. This is necessary in order to make sure that the component operates properly.

Step 19

Shut off the engine.

Step 20

Remove the fender protection cover.

Step 21

Close the hood.

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