How to Change Spark Plugs Toyota Corolla
How to Change Spark Plugs Toyota Corolla: 2018 Toyota Corolla, 1.8 liter engine, type 2ZR/FE. Toyota spark plug part number is 909 190 1275 for Platinum spark plugs, it’s not expensive from Toyota, about $15 per spark plug.
However, there are a lot of aftermarket choices which will do fine too, Denso, Bosch, NGK, etc. There is no need to gap spark plug electrodes prior to installation. New spark plugs electrodes are gaped form factory.
This is a 2018 Toyota Corolla but spark plug change procedure is very similar or identical to a wide range of corolla production years, older or newer. Only meaningful difference is older models use 16mm spark plugs instead of 14mm spark plugs.
Trouble codes for Toyota spark plug failure usually are manifested as single or multiple cylinder misfire with the latter being most common. Difficult engine cold starts and rough idling are common symptoms of failing spark plugs. P0300 is generic code for multiple misfire.
Spark plugs should be replaced at 100,000km intervals depending on spark plug type. Although some manufacturers are claiming double that mileage which might not be realistic. More on: Spark Plug Change Intervals.
Tools: 10mm socket and ratchet, 14mm spark plug socket and a flat screwdriver. Grease or anti seize compound.
Spark Plug Removal Corolla
Remove engine cover. Engine cover has three rubber bushings, pull it upwards and will come out.
Unplug electrical connections form ignition coils. Press on center safety tab on ignition coil plug while simultaneously pulling on it.
Sometimes ignition oil electrical plugs are seized and hard to remove. Carefully use a flat screwdriver between coil body and coil electrical plug as a lever to help remove it.
Remove 10mm bolts on all four ignition coils. Remove ignition coils, just pull straight out to remove them.
Use 14mm socket and ratchet to remove spark plugs on all cylinders. Use a flashlight and check for oil on spark plugs openings. Change valve cover gasket and spark plugs o-ring gasket if oil is present. Oil in spark plug holes will deteriorate spark plug rubber boot and trigger misfires.
Spark plug Installation Toyota Corolla
Apply grease or anti-seize compound on new spark plug threads. Use only socket and extension for initial new spark plug installation, no ratchet or force. Insert a new spark plugs into 14mm socket and install it By Hand Only.
Do not use a ratchet when installing spark plugs initially, by hand only. Aluminum engine head threads are fragile. Threads will be destroyed if spark plugs are not threaded straight or are installed by force. You are looking at expensive repairs if that happens.
Use ratchet to fully tighten spark plugs after hand installation. Do not over tighten, usually is half a turn or a bit more after hand tightening.
Push ignition coils in place and install 10mm coil bolts.Do not over-tighten ignition coil bolts or you may crack ignition coil housing. Plug in ignition coil electrical connectors. Line up engine cover rubber holders and install it by firmly pushing it in place. Start the car and leave it running for a couple minutes to check everything is running properly.
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