How to Change the Spark Plugs in Dodge Cars

by Contributing Writer; Updated June 12, 2017

The Dodge car Dual Overhead Cam engine spark plugs are located in the top center of the cylinder head--right between the cams. The ignition system uses a coil pack located right beside the plugs. The system has very short spark plug wires from the coil to the spark plug so current drop is very low over the length of the wire. The spark plugs are mounted at the base of a tube in the valve cover so an extension on a ratchet is required to reach them.

Under The Hood:

 How to Change the Spark Plugs in a Dodge Caliber

Open the Caliber's hood and prop it up.

Remove one coil at a time to access the spark plugs. The Dodge Caliber uses a coil-over-plug ignition system instead of a distributor. Each coil is held on by two bolts that can be removed with a ratchet. Turn in a counterclockwise direction and then pull the coil out once the bolts are removed.

Remove the spark plug with a ratchet. Attach a long extension and spark plug socket to the ratchet and turn counterclockwise.

Install the new spark plug in the cylinder and tighten using a normal socket (13/16 inch). A normal socket is necessary because a spark plug socket will grab onto the spark plug and get stuck in the cylinder.

Reinstall the coil on the spark plug and tighten the bolts with a ratchet.

Repeat Steps 2-5 for each plug, and then close the hood.

Items you will need

  • Ratchet

  • Sockets

  • Extension

  • Spark plug socket

  • New spark plugs

 How to Replace the Spark Plugs on a 2002 Dodge Durango

Unplug the negative (black) cable from the truck's battery. Loosen the clamp nut with a wrench so you can unsnap the cable from the terminal.

Disconnect the ignition coil by removing its mounting bolts with a wrench, unplugging its electrical connector and lifting out the coil.

Blow all dust, dirt and other materials out of the spark plug hole using compressed air.

Insert your torque wrench, with an extension and spark plug socket attached, into the spark plug hole and unscrew the spark plug out by turning it counterclockwise.

Apply a thin coat of anti-seize compound to the threads of the replacement spark plug.

Thread the new spark plug into the hole by hand, then tighten it with the torque wrench.

Re-install the ignition coil in the engine with its mounting bolts and electrical connector.

Connect the negative battery cable after replacing all necessary spark plugs.

Items you will need

  • Torque wrench with extension

  • Spark plug socket

  • Rubber hose

  • Anti-seize compound

  • Small brush

 How to Replace Spark Plugs in a Dodge Intrepid

Turn off the ignition and allow the engine to cool. The time required for the engine to cool varies depending on climate.

Remove the intake manifold and locate the spark plug wires. These are situated across the sides of the Intrepid model's engine.

Grab the spark plug wires by their boot and turn them 180 degrees to the left to loosen the wire. Pull back on the boot to remove it from the spark plug.

Spray air into the cylinder to remove any dirt around the spark plug. Insert the socket into the well and unscrew the old spark plug. Pull the old spark plug out of the well.

Screw the new spark plug into the Dodge Intrepid model's engine. Do not use silicon or anti-seize on these spark plugs. Tighten the spark plug.

Test the plug for tension. For 2.7 L engines, tighten to 12.5 ft-lbs. For 3.5 L engines, tighten to 20 ft-lbs. The tension varies for the 3.2 L engine, so consult the spark plug packaging to find the correct tension.

Replace the spark plug wire. Repeat Steps 3 through 6 for the remaining spark plugs.

Reattach the intake manifold.

Items you will need

  • Spark plug socket

  • Socket wrench and extension

  • Canned air

  • New spark plugs

  • Tension tester tool

 How to Replace Spark Plugs on a 2002 Dodge Neon

Remove the spark plug wire from the spark plug on one end of the engine. Grip the wire at the end to prevent disconnecting the wire from the boot that covers the end of the spark plug. Pull the wire from the spark plug.

Inspect the exposed end of the spark plug. If you notice rust or corrosion, apply penetrating oil around the seal between the plug and the engine housing. Allow 24 hours before attempting to remove the spark plug.

Set the ratchet to loosen (counterclockwise). Slide the extension bar on the ratchet. Place the soft-core socket on the extension bar. The socket's pliable inner core is designed to prevent the socket from slipping during spark plug removal.

Check the instructions that came with your spark plugs to determine if they need to be "gapped." Gapping involves the use of a gap tool to adjust the distance between the electrical conduction components of each plug. If gapping is necessary, use the gap tool to increase or decrease the distance the spark travels.

Slide the socket over the spark plug. Turn the ratchet counterclockwise to remove the spark plug. Replace with a new spark plug. Set the ratchet to tighten and fit it over the new plug. Turn the ratchet clockwise until the spark plug is tight.

Replace the spark plug wire. Press down firmly to ensure a solid connection.

Repeat the process for the remaining three spark plugs, removing only one spark plug wire at a time.

Items you will need

  • Spark plug set for 2002 Dodge Neon

  • Ratchet with extension

  • Soft-core socket

  • Penetrating oil

 How to Replace Spark Plugs in a Dodge Ram

Disconnect the Dodge Ram model's negative battery cable and allow the engine to cool. For 3.7, 4.7 and 5.7 L engines, remove necessary air filter tubing at the throttle body to gain access to the spark plugs.

Locate the spark plug wires and gain access to the wire boots. On the 3.9, 5.2, 5.9 and 8.0 L engines, the spark plug wires are located across the sides of the engine with heat shields around the boots of the wires. On the Ram 5.7 L engine, eight of the 16 spark plugs are under the ignition coil. Remove the coil to access the spark plugs. The other eight spark plugs are located along the sides of the engine. The 3.7 and 4.7 L Ram engines have their spark plugs under each ignition coil.

Turn one spark plug wire by the boot one-half turn to the right and one-half turn to the left to loosen the wire. Pull back on the wire boot and remove it from the spark plug.

Cover the end of the spark plug with the socket and turn it counter-clockwise to unscrew and then remove the spark plug.

Apply anti-seize compound to the threads of the new spark plug and inside the wire boot.

Insert the new spark plug into the cylinder well and tighten it manually. Test the tension with a tension tester tool. A 5.7 L engine requires a tension of 11 to 15 ft-lbs. The 3.7 and 4.7 L engine's spark plug tension needs to be set between 15 to 20 ft-lbs. The 3.9, 5.2, 5.9 and 8.0 L engines require a tension between 26 and 30 ft-lbs.

Reconnect the spark plug wire and move on to the next plug. Continue the process until all of the spark plugs are replaced.

Replace all of the items that were removed in Steps 1 and 2.

Items you will need

  • Screwdriver

  • Spark plug socket

  • Socket wrench and extension

  • Anti-seize compound

  • New spark plugs

  • Tension tester tool

 How to Replace Spark Plugs in a 2001 Dodge Stratus DOHC

Disconnect the negative battery cable from the negative terminal of the battery before working on the ignition system. Loosen the retaining bolt on the cable end with a wrench and remove the cable from the battery.

Pick a cylinder to start with and remove the spark plug wire from the coil pack. It will pull right off with a slight twisting motion. Pull the boot off the spark plug and out of the hole in the valve cover. Set the wire aside for now.

Insert a spark plug socket with an extension attached into the hole in the valve cover and onto the spark plug. Connect a ratchet to it and turn the ratchet counterclockwise, loosening the plug, and then pull the socket and plug out of the hole. Discard the old plug.

Connect a piece of 3/8-inch diameter hose onto the end of a new AP5263 spark plug and insert it into the valve cover. Turn the hose to thread the spark plug into the cylinder head and then pull the hose loose from the plug. Tighten the plug until tight with your spark plug socket, ratchet and extension.

Push the spark plug wire back onto the spark plug and then plug the other end onto the coil pack. Move to the next plug and repeat the process.

Install the negative battery cable on the negative battery terminal and tighten the retaining bolt with a wrench.

Items you will need

  • Wrench set

  • Spark plug socket

  • 3/8-inch rubber hose

  • 4 AP5263 spark plugs

 How to Replace Spark Plugs in a Dodge Durango

Find the spark plug wires and allow the engine to cool. The spark plug wires are located on the side of the Durango model's engine.

Grab the spark plug wire by the boot. Twist and pull back on the spark plug wire to remove it from the spark plug.

Insert the socket into the heat shield and remove the old spark plug from the engine. Turn the socket to the left to unscrew the spark plug.

Smear a generous amount of anti-seize lubricant on the threads of the new spark plug.

Insert the new spark plug into the heat shield and the cylinder well and tighten it manually.

Test the tension on the spark plug to make sure it is between the numbers listed on the spark plug's package.

Attach the wire to the spark plug and turn it slightly to lock it into place. Pull back on the spark plug wire by the boot to make sure the lock is secure. Repeat Steps 2 through 6 for the remaining spark plugs. Only remove one spark plug at a time to reduce any confusion about where a spark plug wire needs to go.

Items you will need

  • Spark plug socket

  • Socket wrench and extension

  • Anti-seize compound

  • New spark plug

  • Tension testing tool

 How to Replace Spark Plugs in a 2005 Dodge Grand Caravan

Raise the hood of your Grand Caravan. Select a spark plug to start with. The plugs will be located beneath the spark plug wires, which are visible from the top of the engine.

Twist the rubber boot on the spark plug wire while pulling up to remove it from the plug. Remove the spark plug from your Grand Caravan’s engine with a spark plug socket and ratchet.

Check the gap on the new plug using a spark plug gapping tool. Slide the gapping tool into the space between the metal piece on the top of the plug and the electrode. The gapping tool should read 50-thousandths. If the gap is too large, push the top of the plug against a hard surface. Use the gapping tool to bend the top of the plug slightly to widen the gap if it is too small.

Insert the plug by hand to avoid cross threading. Tighten the plug with a spark plug socket and ratchet. Squeeze a drop of dielectric grease into the Grand Caravan’s spark plug wire boot. Push the boot onto the plug until it clicks.

Repeat the process, one plug at a time, until you replace all of the plugs. Close the hood of your Grand Caravan.

Items you will need

  • Spark plug socket

  • Ratchet

  • Spark plug gapping tool

  • Dielectric grease

 How to Replace Spark Plugs in a Dodge Caravan

Allow the Dodge Caravan to cool down. Park the car in the shade and pop the hood.

Locate the spark plug wires, which are located about halfway down the sides of the engine block.

Grasp the spark plug wires by their boot, which is the larger piece that covers the spark plug. Turn the boot 180 degrees to the left and then all the way to the right. Pull back on the boot to remove it from the spark plug. Never pull a spark plug by the wire. Remove one wire at a time. If the wires are on the wrong spark plug, it will damage the cylinder and engine.

Remove the spark plug from the cylinder well with the socket, wrench and extension. Spray the well with canned air to remove any debris.

Spray silicon into the wire boot and around the threads of the new spark plug. Insert the spark plug into the cylinder well and tighten the plug in place.

Test the tension on the spark plug. Adjust the tension to 20 ft-lbs. Reconnect the spark plug wire. Repeat Steps 2 through 6 for the remaining spark plugs.

Items you will need

  • Spark plug socket

  • Socket wrench and extension

  • Canned air

  • New spark plug

  • Silicon spray

  • Tension tester tool