Recommended replacement interval for the part category Spark plug : 3 year / 45000 km

Important!

This replacement procedure can be used for:
VOLVO 850 Saloon (854) 2.4 GLE, VOLVO 850 Saloon (854) 2.3 Turbo R, VOLVO 850 Saloon (854) 2.3 Turbo R, VOLVO 850 Saloon (854) T5 R, VOLVO 850 Saloon (854) 2.0 Turbo, VOLVO 850 Saloon (854) T5-R, VOLVO 850 Saloon (854) T5, VOLVO 850 Saloon (854) 2.0 Turbo … 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 850 Saloon (854) and other VOLVO models

Spark plug

        Spark plug for 850 Saloon (854) Petrol (210 hp)
      
        Spark plug for 850 Saloon (854) Petrol (226 hp)
      
        Spark plug for 850 Saloon (854) Petrol (250 hp)
      
        Spark plug for 850 Saloon (854) Petrol (179 hp)
      
        Spark plug for 850 Saloon (854) Petrol (239 hp)
      
        Spark plug for 850 Saloon (854) Petrol (241 hp)
      
        Spark plug for 850 Saloon (854) Petrol (193 hp)
      
        Spark plug for 850 Saloon (854) Petrol (243 hp)

Replacement: spark plugs – VOLVO 850 (LS). Tools you need:

                        Electronic spray
                      
                        High-temperature anti-seize lubricant
                      
                        Drive socket # 7 
                      
                        Drive socket # 10 
                      
                        Torx bit T20
                      
                        Spark plug socket # 16
                      
                        Ratchet wrench
                      
                        Torque wrench
                      
                        Flat screwdriver
                      
                        Microfibre towel
                      
                        Fender cover

Buy tools

Replacement: spark plugs – VOLVO 850 (LS). AUTODOC recommends:

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

Replacement: spark plugs – VOLVO 850 (LS). Recommended sequence of steps:

Step 1

Open the hood.

Step 2

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

Step 3

Unscrew the engine cover fastener. Use Torx T20. Use a ratchet wrench.
Step 4

Remove the engine cover.

Replacement: spark plugs – VOLVO 850 (LS). Tip:
Raise the engine cover, holding it on two sides simultaneously.
Step 5

Unplug the connectors from the ignition coils.
Step 6

Disconnect the air intake pipe fastening. Use a drive socket #10. Use a ratchet wrench.
Step 7

Detach the air intake hose clamp. Use a drive socket #7. Use a ratchet wrench.
Step 8

Remove the air intake pipe.
Step 9

Cover the air intake hose with a microfibre towel to prevent dust and dirt from getting into the system.
Step 10

Unscrew the ignition coil bracket. Use a drive socket #10.
Step 11

Take out the ignition coil from the spark plug well.

Replacement: spark plugs – VOLVO 850 (LS). AUTODOC experts recommend:
Remember the sequence of steps for ignition coil demounting.
Step 12

Clean dirt, dust and debris from inside the spark plug wells.
Step 13

Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
Step 14

Take out the spark plugs.
Step 15

Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs. Treat the surface of the terminals of the new spark plugs. Use high-temperature grease.
Step 16

Install the new spark plugs into their mounting seats.
Step 17

Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 27 nm torque.

Replacement: spark plugs – VOLVO 850 (LS). Tip from AUTODOC experts:
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 18

Treat the ignition coil tips. Use high-temperature grease. Use a flat screwdriver.
Step 19

Install the ignition coils to the spark plug wells. Make sure you hear a click indicating that it is locked in place.

Replacement: spark plugs – VOLVO 850 (LS). Tip from AUTODOC:
Follow the installation sequence.
Step 20

Tighten the fasteners of the ignition coils. Use a drive socket #10. Use a torque wrench. Tighten it to 8 nm torque.
Step 21

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 22

Plug in the connectors of the ignition coils. Make sure you hear a click indicating that it is locked in place.
Step 23

Remove the microfibre towel from the air intake hose.
Step 24

Install the air intake pipe and secure it.
Step 25

Fasten the clamp on the air intake hose. Use a drive socket #7. Use a ratchet wrench.
Step 26

Screw in the fastener of the air intake pipe. Use a drive socket #10. Use a ratchet wrench.
Step 27

Install the engine cover and secure it.

Step 28

Screw in the engine cover fasteners. Use Torx T20. Use a ratchet wrench.

Replacement: spark plugs – VOLVO 850 (LS). Professionals recommend:
Make sure the engine cover is properly seated. It should not be displaced with respect to the guiding fasteners.Do not apply excessive force when installing the part. Otherwise you may damage the fasteners.
Step 29

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

Step 30

Shut off the engine.

Step 31

Remove the fender protection cover.

Step 32

Close the hood.

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