The replacement procedure is the same for all spark plugs.
Please note: all work on the car – VW PASSAT Variant (3A5, 35I) – should be done with the engine switched off.
Carry out replacement in the following order:
Step 1
Open the hood.
Step 2
Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
Step 3
Detach the connector from the ignition coil.
Step 4
Clean the ignition coil bolts. Use a wire brush. Use WD-40 spray.
Step 5
Unscrew the ignition coil bolts. Use a drive socket #10. Use a ratchet wrench.
Step 6
Remove the ignition coil.
Step 7
Clean dirt, dust and debris from inside the spark plug wells.
Step 8
Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
Step 9
Take out the spark plugs.
Step 10
Apply a thin layer of a special high temperature anti-seize lubricant to the threads of the new spark plugs.
Step 11
Install the new spark plugs into their mounting seats.
Step 12
Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten it to 25 nm torque.
Replacement: spark plugs – VW PASSAT Variant (3A5, 35I). Tip from AUTODOC:
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.Lower the spark plugs into the wells carefully, making sure not to damage the electrode gap.
Step 13
Install the ignition coil.
Step 14
Tighten the ignition coil bolts. 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
Run the engine for a few minutes. This is necessary in order to make sure that the component operates properly.
Step 18
Shut off the engine.
Step 19
Remove the fender protection cover.
Step 20
Close the hood.
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