Install spark plugs 2004 jeep grand cherokee

Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap or a cracked porcelain insulator. Before installing ignition coil s , check condition of coil o-ring and replace as necessary. To aid in coil installation, apply silicone to the coil o-ring.

Position ignition coil into cylinder head opening and push onto spark plug. Do this while guiding coil base over mounting stud. Installing plugs — 4. To aid in coil installation, apply silicone to coil o-ring. Remove necessary air filter tubing and air intake components at top of engine and at throttle body. To remove the upper row of plugs, each individual ignition coil must first be removed. Prior to removing ignition coil, spray compressed air around coil base at cylinder head.

Metallic deposits will remain on spark plug insulator and will cause plug misfire. Also apply this grease to the tops of spark plugs. Start the spark plug into the cylinder head by hand to avoid cross threading. CAUTION: Due to tight clearances between upper row of plugs and cylinder head, a conventional deep, thick-wall spark plug socket will not fit.

Install necessary air filter tubing and air intake components to top of engine and to throttle body. The coil mounts to the top of the valve cover with two bolts.

Unlock the coil electrical connector by moving slide lock first. Press on release lock while pulling electrical connector from coil. Start the spark plug into cylinder head by hand to avoid cross threading the aluminum threads. To aid in installation, attach a piece of rubber hose, or an old spark plug boot to the spark plug. Tighten spark plugs to Ft. Before installing spark plug cables to either the spark plugs or coils, or before installing a coil to a spark plug, apply dielectric grease to inside of boots and the top of the spark plug.

Twist coil into position. Spark plug cables on the 5. Before removing or disconnecting any spark plug cables, note their original position. Do jeep grand Cherokee limiteds have platinum plugs from factory? Where are the spark plugs on a jeep grand Cherokee? Why does your jeep grand Cherokee limited 4. Could dirty spark plugs also occur on a Grand Cherokee like it did on your Grand Cherokee? Where are the spark plugs located on a jeep grand Cherokee loredo 4.

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Spark Plug Socket. Spark Plug Wire. Spark Plug Wire Cover. Spark Tester. Wiper Blade. Add to Cart. Gap 0. Price reflects cost of each individual item, not the pack. Platinum lasts up to 2x longer than copper. Double Platinum lasts up to 3x longer than copper.

Iridium lasts up to 4x longer than copper. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car.

If the maintenance schedule says the plugs should be replaced, it is best to do so promptly. Estimate price near me. Service Location. Customer Ratings. Included for free with this service Online Booking.

Mechanic comes to you. Free 50 point safety inspection. See availability. What are spark plugs and how do they work? When should you replace spark plugs? Avoiding spark plug replacement can cause: Difficulty starting your car. Check engine light for a misfire code. Flashing check engine light during acceleration for misfire, this can cause engine damage. Failed State emission testing. How do mechanics replace spark plugs? The mechanic will: Have the correct spark plugs on hand for your vehicle Pull any diagnostic trouble codes that may be related to worn spark plugs.