90919-01176 Japanese Car Spark Plugs For TOYOTA 4 RUNNER CAMRY COROLLA TACOMA II Pickup

Japanese Car Spark Plug 90919-01176 For TOYOTA 4 RUNNER CAMRY COROLLA TACOMA II Pickup

Description 

Replacing Spark Plugs:

Step 1 - First, identify the ignition system your car has, most cars have a DIS (direct ignition system, shown). The HEI (high energy ignition) this ignition system has a distributor with cap and rotor. The COS system (coil over spark plug) which has no plug wires just ignition coils. Firmly grab a hold of the spark plug wire at the boot nearest the spark plug. Gently but firmly twist the boot to loosen the seal, now remove the spark plug wire.

Step 2 - Remove debris from the spark plug hole, (canned air works best) then use a socket wrench and spark plug socket to loosen and remove the spark plug (counter clockwise). Before you remove the spark plugs, mark the plug wires to identify their positions in the firing order, this will help to make sure they do not get mixed up. Always use a spark plug socket to remove the spark plugs. We use a spark plug socket because the inside of the socket is lined with rubber to help cushion the spark plug insulator, which is made of porcelain and can be easily cracked or broken removing or installing. If a spark plug insulator is cracked or broken the engine will misfire as the ignition spark will travel to the engine block (ground) instead of the spark plug gap (between the electrodes).

Before installing spark plugs always inspect the spark plug mounting hole threads, check for rust and debris, clean and lubricate as needed. If spark plug threads are damaged use a thread cleaner or tap loaded with grease to catch the metal chips that would go into the combustion chamber. Also use a can of compressed air with the long plastic extension the can comes with the can and insert into the spark plug hole down into the cylinder and blow excess partials out (cover your eyes from air-born debris) to help the removal of additional particles. When removing the spark plugs organize them according to their related cylinder. Next compare your spark plugs to those on the chart below for potential or present problems. Inspect spark plug condition

Step 3 - When reinstalling new plugs be sure the spark plugs you are installing are made for your car and engine size. Do not install spark plugs just because they fit, design issues can cause internal engine damage, example: if the spark plug electrode is to long it can damage the piston. Use a spark plug gapping tool to check the measurement between the electrodes, most spark plug gaps are between .035 and .045. This gap is important because it determines the amount of resistance used to "time" the ignition system. An incorrect spark plug gap will result in low power, poor mileage and possibly a check engine light notice. For the exact measurement for your car consult a car repair manual.

Remove the spark plug from the box or container and inspect the new plug for damage that could have occurred in shipping. A spark plug has a porcelain isolator that is fragile and can crack easily. Reinstall the spark plug and install the new spark plug wire. Most of the time a spark plug will come "pre-set" and ready to install. Continue the process until all spark plugs and spark plug wires have been replaced. Be sure to use OE (original equipment) parts for your car or truck to insure the proper performance from your vehicle.

Step 4 - When reinstalling the new spark plug make sure the sealing gasket is located on the threaded part of the spark plug, some spark plugs do not have a sealing ring, this is normal. Only tighten the spark plugs to "snug" and install a small portion of anti-seize grease to ensure proper installation. Save the old spark plug in the new spark plug boxes, store them for future reference. Once you have completed the spark plug change start the engine and inspect the running condition, it should be smooth with no extra noises. If your engine is running rough double check the spark plug wires to make sure one has not popped off or that the plug wires are in the right order.