How to Change Spark Plugs 2016 Jeep Cherokee? | Engine First

Changing spark plugs on a 2016 Jeep Cherokee is a DIY job, but you must match the socket, gap, and torque to your 2.4L or 3.2L engine.

You don’t need a dealer to learn how to change spark plugs 2016 Jeep Cherokee, but you do need to start with the engine. Jeep offered this generation of Cherokee with two very different powertrains: the 2.4L Tigershark MultiAir 2 four-cylinder and the 3.2L V6. They use the same 5/8-inch spark plug socket, but the access path, plug gap, and torque spec are not interchangeable. A quick VIN check up front tells you exactly which engine you have and prevents the two most common failures: buying the wrong plug and stripping the threads in an aluminum head.

Start With the Right Engine: 2.4L or 3.2L

All 2016 Cherokee spark-plug work starts with engine identification, because the 2.4L and 3.2L follow different access procedures and need different spark plug specifications. Confirm the engine before you buy parts or pull a single coil.

Here are the specifications that matter for each engine:

Let the engine cool fully and disconnect the negative battery cable before you start. The factory 2016 Cherokee service manual is the authoritative source for the exact torque values and component layout on your engine.

How to Change Spark Plugs on the 2.4L Cherokee

On the 2.4L engine, the job is manageable in a home garage if you work through the steps in order. The documented procedure for the MultiAir 2 engine looks like this:

1. Disconnect the negative battery cable. This removes power from the ignition system and lowers the risk of an electrical surprise while you’re leaning over the engine.
2. Remove the engine cover, then move or remove the intake path components that sit above the plugs. On the 2.4L, those pieces block direct access to the coil packs, so the extra step saves you from fighting for space.
3. Unplug the ignition coil connectors and remove the coils from the plug wells. Label each coil with its cylinder number so it goes back in the same position.
4. Clean debris from around each plug well with a vacuum or a gentle blast of compressed air before pulling the old plug. Anything that falls into the cylinder on removal is a problem.
5. Remove each old plug using a 5/8-inch spark plug socket, a 6-inch extension bar, and a 3/8-inch drive ratchet. Turn counterclockwise and keep the socket square on the plug so you don’t round the hex.
6. Install the new plug by hand first. Thread it clockwise until it seats by finger pressure, then tighten it with a torque wrench to the factory specification. Hand-starting is the only reliable way to avoid cross-threading the aluminum head.
7. Reassemble in reverse order. Reinstall the coils, snap every electrical connector back in, and refit the intake path and engine cover. One loose connector is enough to trigger a misfire.

When the engine starts and idles smoothly, the replacement worked. If you see a check-engine light or a rough idle, check that every coil is fully seated and every intake duct is locked into place before digging deeper. For plug choices that match the 2.4L’s reach and gap, our tested roundup of the best 2016 Cherokee 2.4L spark plugs lists verified options that fit the well.

What Changes on the 3.2L V6

The 3.2L V6 follows the same basic sequence, but the tighter engine bay makes the job more involved. A documented approach for this engine removes part of the intake system to reach the plugs, then uses the same 5/8-inch spark plug socket and a torque wrench for installation.

Plan for new intake seals before you start. The documented 3.2L procedure specifically calls for replacing the intake seals during reassembly, so have the seals on hand rather than trying to reuse crusty old ones. The rest of the discipline matches the 2.4L: cool engine, clean plug wells, start every plug by hand, and finish at 13 ft-lbs (156 inch-pounds) with the gap set at 0.043 inch.

If the intake components resist coming apart, do not force them. Broken vacuum ports and torn seals turn a plug replacement into a much longer repair. Stopping to order the right seal is cheaper than chasing a vacuum leak later.

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