Toyota 90080-91184 Plug, Spark

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To replace the spark plugs, you will require a spark plug socket with a rubber grommet to shield the porcelain insulator. A wire type feeler gauge is used in checking and setting gaps between spark plugs; finally a torque wrench to tighten them correctly. To buy the right ones for your vehicle, refer to specifications, VECI label under hood or owner's manual. When buying new plugs do not pick those with broken porcelain insulators. Check the electrode gap according to given instructions while aligning its side electrode where necessary. Please don't even try fixing it on previously used iridium-coated plugs. Before removing the old ones, get rid of engine cover as well as ignition coils then blow off any dirt so that they can be extracted out smoothly. Examine the previous ones to assess how good or bad your engine is running. Apply anti-seize compound on plug threads before installing them and use rubber tubing for alignment when avoiding cross-threading during installation process. Afterwards reinstall the ignition coils tightening these down at specified torque figures and repeat with other remaining ones in like manner.

Repeat the process for the remaining spark plugs.