🔧 Grand Cherokee WK - Starter Motor Replacement

You’ll be removing the old starter motor from under the vehicle and installing a new one. The starter is what cranks the engine when you turn the key or push the start button.

Difficulty Level: Intermediate | Estimated Time: 2–3 hours

---

⚠️ Safety & Precautions

• ⚠️ Always disconnect the negative battery terminal before touching the starter — it has direct battery power and can spark badly.
• ⚠️ Raise and support the front of the vehicle with a floor jack and jack stands; never rely on the jack alone.
• ⚠️ Let the exhaust cool completely before working underneath, as it runs near the starter.
• ⚠️ Wear safety glasses; dirt and rust can fall into your eyes when working under the SUV.
• ⚠️ Keep the transmission in Park and set the parking brake; use wheel chocks behind the rear wheels.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 10mm socket
• 🧰 13mm socket
• 🧰 15mm socket
• 🧰 3/8" drive ratchet
• 🧰 3/8" drive socket extension (6")
• 🧰 1/2" drive ratchet
• 🧰 1/2" drive torque wrench (10–100 ft-lbs)
• 🧰 Flathead screwdriver (medium)
• 🧰 Trim clip removal tool
• 🧰 Pry bar (small)
• 🧰 Floor jack (rated 3-ton minimum)
• 🧰 Jack stands (rated 3-ton minimum, Qty: 2)
• 🧰 Wheel chocks (Qty: 2)
• 🧰 Work light or headlamp
• 🧰 Mechanic’s gloves
• 🧰 Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Starter motor assembly (for 3.6L) - Qty: 1
• 🔩 Starter motor mounting bolts - Qty: 2 (recommended new)
• 🔩 Battery terminal cleaning brush - Qty: 1
• 🔩 Dielectric grease - Qty: 1 small tube
• 🔩 Anti-seize compound - Qty: 1 small tube
• 🔩 Electrical contact cleaner spray - Qty: 1
• 🔩 Replacement plastic push clips for splash shield/skid plate - Qty: 4–6 (if any break)

---

📋 Before You Begin

• Park the Grand Cherokee on a flat, solid surface. Put the transmission in Park and set the parking brake.
• Place wheel chocks behind both rear wheels to prevent any movement.
• Make sure the engine is fully cool to avoid burns from the exhaust or engine.
• Open the hood and locate the battery at the front. You will disconnect it at the start of the procedure.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

• Open the hood and support it securely.
• Use the 10mm socket and 3/8" drive ratchet to loosen the nut on the negative (black, “–”) battery terminal clamp.
• Twist and lift the terminal off the battery post, then tuck it to the side so it cannot spring back and touch the post.
• Never work on the starter with the battery connected.

Step 2: Raise and support the front of the vehicle

• Position the floor jack (3-ton) under the front center jacking point or crossmember (solid metal under the front).
• Jack the front of the vehicle up high enough to work comfortably underneath.
• Place jack stands (3-ton) under solid frame or pinch-weld points on both sides and slowly lower the SUV onto the stands.
• Give the vehicle a firm shake to confirm it is stable.
• Stay out from under the SUV while raising/lowering.

Step 3: Remove front lower splash shield / skid plate (if equipped)

• Position your work light so you can see under the front of the vehicle.
• Look for the plastic splash shield or metal skid plate under the engine area that may cover access to the starter.
• Use the 10mm socket and 3/8" drive ratchet to remove any small bolts holding the shield.
• Use the trim clip removal tool to pop out any plastic push clips.
• Carefully lower the shield/plate and set it aside.
• Keep bolts and clips together so you don’t lose them.

Step 4: Locate the starter motor

• From underneath on the passenger side, look where the engine meets the transmission (the bellhousing area).
• The starter is a cylindrical motor with a smaller cylinder (solenoid) attached and heavy battery cable(s) going to it.
• Confirm you see two main bolts holding the starter to the transmission housing and at least one heavy electrical cable on the back of the starter.

Step 5: Disconnect starter electrical connections

• Before touching the wires, double-check that the negative battery terminal is disconnected.
• On the starter solenoid, locate the large battery cable attached with a nut, and a smaller push-on connector for the control wire.
• Use the 13mm socket and 3/8" drive ratchet to remove the nut holding the large battery cable to the starter stud. Note the order of any washers.
• Gently pull the large cable off the stud and move it aside.
• Use a flathead screwdriver if needed to carefully release the locking tab on the small connector, then pull the connector straight off the solenoid.
• Do not pull on the wires; pull on the connector body.

Step 6: Remove starter mounting bolts

• Support the body of the starter with one hand so it doesn’t drop when the bolts are removed.
• Use the 15mm socket, 6" extension, and 1/2" drive ratchet to loosen and remove the lower starter mounting bolt first.
• Then remove the upper starter mounting bolt using the same 15mm socket and extension. Space is tight, so take your time.
• Once both bolts are out, gently wiggle and pull the starter away from the transmission. You may need a small pry bar to carefully break it loose from the mounting surface.
• Lower the starter down and remove it from under the vehicle.

Step 7: Prepare the mounting surface and wiring

• Inspect the starter mounting area on the transmission. Wipe away dirt or corrosion with a rag.
• If any corrosion is present on the big cable eyelet or nut, spray a little electrical contact cleaner and wipe it clean.
• Check that the small control wire connector is not damaged or loose.
• Clean, tight connections help the new starter last longer.

Step 8: Install the new starter motor

• Compare the new starter to the old one: same mounting holes, same electrical connections, same general shape.
• Apply a very thin film of anti-seize compound to the shank (smooth part) of the new starter bolts if you are reusing them, not on the threads.
• Lift the new starter into position, lining up the nose of the starter with the opening in the transmission housing.
• Start the upper mounting bolt by hand first, turning it a few threads to hold the starter in place.
• Start the lower mounting bolt by hand as well.
• Use the 15mm socket, extension, and 1/2" drive ratchet to snug both bolts, but do not fully tighten yet.
• Once centered and seated, use the 1/2" drive torque wrench with the 15mm socket to tighten the two starter mounting bolts to 54 Nm (40 ft-lbs).

Step 9: Reconnect starter wiring

• Slide the large battery cable eyelet back onto the starter solenoid stud in the same order as removed (eyelet, then any washer).
• Thread the nut on by hand to avoid cross-threading.
• Use the 13mm socket and 3/8" drive ratchet to tighten the nut securely; then, if you prefer, use the 3/8" drive torque wrench set to 15 Nm (11 ft-lbs).
• Apply a very small dab of dielectric grease to the small control wire connector terminals.
• Push the small connector onto the solenoid terminal until it clicks and locks in place.
• Make sure the wires are routed away from moving parts and exhaust.

Step 10: Reinstall splash shield / skid plate

• Lift the splash shield or skid plate back into position under the front of the vehicle.
• Install any bolts by hand first, then tighten using the 10mm socket and 3/8" drive ratchet snugly (no specific torque needed, just firm).
• Reinstall any plastic push clips using your fingers or the trim clip removal tool to press them fully into place.

Step 11: Lower the vehicle

• Position the floor jack under the same front jacking point or crossmember and raise the vehicle slightly to take weight off the jack stands.
• Remove the jack stands from both sides.
• Slowly lower the vehicle to the ground with the jack.
• Remove the wheel chocks from behind the rear wheels when finished.

Step 12: Reconnect the battery and test

• At the battery, clean any corrosion off the negative terminal clamp with the battery terminal cleaning brush if needed.
• Place the negative terminal clamp back onto the battery post.
• Use the 10mm socket and 3/8" drive ratchet to tighten the clamp nut until the terminal does not move by hand. Do not over-tighten.
• Get into the driver’s seat, press the brake pedal, and press the start button.
• The engine should crank strongly and start quickly. Listen for any unusual grinding or whining from the starter area.

---

✅ After Repair

• Start the engine several times in a row to confirm consistent, strong cranking.
• Check under the vehicle for any loose wires or parts you may have missed.
• Verify that no warning lights related to charging or battery appear on the dash.
• After a short test drive, recheck the battery terminals and starter wiring to ensure they are still tight.

---

💰 DIY vs Shop Cost

Shop Cost: $650–$900 (parts + labor)

DIY Cost: $250–$400 (parts only)

You Save: $400–$500 by doing it yourself!

Shop labor rates vary but typically run $100–$150/hour. This repair takes a shop approximately 2.0–2.5 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections above to add everything to your cart.