F-150 - Starter Motor Replacement 🔧

You’re working on a 2016 Lariat 5.0L 4WD. I’ll walk you through this like a first-time DIY job.

Quick Questions ❓

Before we start, answer these two so I can fine-tune details:

• 🔹 Are you working on the truck with jack stands and a floor jack, or do you only have the factory jack?
• 🔹 Do you have a basic socket set up to 21 mm and a torque wrench (tool that tightens bolts to a specific number)?

I’ll assume you’re on the ground with basic tools and adjust as needed once you reply. For now, here’s the full guide so you can see what’s involved.

Safety First ⚠️

• 🛑 Disconnect the battery before touching the starter. The starter cable is directly connected to the battery and can spark badly if shorted.
• 🛑 Always support the truck with jack stands, never rely only on a jack.
• 🛑 Work on a flat, solid surface, parking brake on, transmission in PARK.

Parts You’ll Need 📦

• 🔧 Starter motor assembly for 2016 F-150 5.0L (new or quality remanufactured).
• 🔧 Optional: new starter mounting bolts (Ford recommends replacing torque-to-yield bolts if equipped; many replacements include new bolts).

Tools You’ll Need 🛠️

• 🔧 Floor jack and jack stands – to safely lift and support the truck.
• 🔧 Wheel chocks – blocks behind wheels so the truck can’t roll.
• 🔧 Socket set:
  • 8 mm and 10 mm (battery terminals and small fasteners)
  • 13 mm and/or 15 mm (starter electrical nut and possibly bracket)
  • 15 mm or 18 mm (starter mounting bolts – varies by supplier)
• 🔧 Ratchet and extensions (3"–6") – extensions help reach the starter bolts.
• 🔧 Torque wrench – tool that clicks at a set torque value.
• 🔧 Flat screwdriver or trim tool – to gently move any plastic shields if needed.
• 🔧 Work light – the starter is under the truck and dark.
• 🔧 Gloves and safety glasses – protect your hands and eyes.

Where the Starter Is Located 📍

On your 5.0L, the starter is mounted low on the passenger side of the engine, where it meets the transmission bellhousing. You’ll access it from underneath.

Step 1 – Prepare the Truck 🧱

• 🧰 Park on level ground, set the parking brake, and put the shifter in PARK.
• 🧰 Chock the rear wheels (place blocks behind them).
• 🧰 Open the hood.

Step 2 – Disconnect the Battery 🔋

• 🧰 Locate the battery under the hood.
• 🧰 Use an 8 mm or 10 mm socket to loosen the negative (-) terminal clamp.
• 🧰 Remove the negative cable and tuck it aside so it cannot spring back to the post. Always remove negative first to avoid short circuits.

Step 3 – Raise and Support the Truck 🧗

• 🧰 Place the floor jack under a solid front frame point or crossmember (not under thin sheet metal).
• 🧰 Lift the front of the truck high enough to crawl under comfortably.
• 🧰 Place jack stands under the frame rails on both sides and gently lower the truck onto them.
• 🧰 Give the truck a firm shake to confirm it’s stable.

Step 4 – Access the Starter 🔎

• 🧰 Slide under from the front or passenger side.
• 🧰 Look at the area where the engine meets the transmission on the passenger side. The starter is a cylindrical motor with a smaller cylinder on top (the solenoid).
• 🧰 If there’s a plastic splash shield in the way, remove the small bolts or push clips with your socket or screwdriver and set them aside.

Step 5 – Disconnect Starter Wiring ⚡

Battery is already disconnected, so this is safe now.

• 🧰 On the starter solenoid, you’ll see:
  • A large cable from the battery (big nut, usually 13–15 mm).
  • A small push-on connector or small nut for the control wire.
• 🧰 Remove the small connector first:
  • If it’s a push-on plug, press the tab and pull it off.
  • If it’s held by a small nut, remove the nut with the correct socket and slide the wire off.
• 🧰 Remove the large cable nut (usually 13 mm or 15 mm). Pull the cable off and move it aside.
• 🧰 Note the positions of any insulators or plastic covers so you can reinstall them the same way.

Step 6 – Remove the Starter Motor 🔩

• 🧰 Locate the starter mounting bolts where the starter meets the transmission bellhousing. There are usually 2 or 3 bolts.
• 🧰 Use the correct socket (commonly 15 mm or 18 mm) with a ratchet and extension to remove the bolts:
  • Crack each bolt loose first.
  • Support the starter with one hand as you remove the last bolt so it doesn’t drop on you.
• 🧰 Carefully lower the starter out of the bellhousing area.

Step 7 – Compare Old and New Starter 🔍

• 🧰 Place the old and new starters side by side.
• 🧰 Check:
  • Mounting holes line up.
  • Electrical studs and connectors are in the same locations.
  • Gear (pinion) size and position match.
• 🧰 If anything looks different, do not install until you confirm the part number.

Step 8 – Install the New Starter 🆕

• 🧰 Lift the new starter into position, aligning the nose into the opening in the bellhousing.
• 🧰 Start all mounting bolts by hand to avoid cross-threading.
• 🧰 Once hand-tight, snug them with the ratchet.
• 🧰 Torque the starter mounting bolts to:
  • Starter mounting bolts: 35–41 lb-ft (47–55 N·m) (Ford spec range for this engine family).

Step 9 – Reconnect Starter Wiring 🔌

• 🧰 Reinstall the large battery cable onto the big stud on the solenoid.
• 🧰 Install the nut and tighten to about 80–106 in-lb (9–12 N·m) – snug but not over-tight; you don’t want to strip the stud.
• 🧰 Reinstall any plastic insulator over the stud if equipped.
• 🧰 Reconnect the small control wire:
  • Push-on connector: press until it clicks.
  • Small nut style: tighten gently, about 35–44 in-lb (4–5 N·m).

Step 10 – Reinstall Shields and Lower the Truck 🛞

• 🧰 Reinstall any splash shields or covers you removed.
• 🧰 Slide out from under the truck.
• 🧰 Use the jack to lift the truck slightly, remove the jack stands, and lower it to the ground.

Step 11 – Reconnect Battery and Test 🔁

• 🧰 Reconnect the negative (-) battery cable and tighten the clamp (8 or 10 mm socket).
• 🧰 Get in the truck and turn the key / push start:
  • The engine should crank strongly and start.
  • Listen for any grinding or strange noises from the starter area.

After the Job – Things to Watch 👀

• 🧰 If you hear grinding, the starter may not be seated correctly or the wrong part was installed.
• 🧰 If you get no crank but dash lights work, recheck:
  • Battery negative cable tight.
  • Starter small control wire fully connected.
  • Large cable nut tight and insulated.

DIY vs Shop Cost 💰

• 🧰 A shop in your area would typically charge:
  • Labor: about 1.0–1.5 hours.
  • Total with parts: usually on the higher side, around $400–$600 equivalent.
• 🧰 Doing it yourself mainly costs the starter and saves most of the labor.

Parts & Tools from HowToo 🛒

Below this answer, HowToo will show you starter options, sockets, torque wrenches, jacks, and jack stands that fit this job. You can add what you need to your cart directly from the tools and parts section or by clicking the “Parts” button in the left sidebar.

If you reply with what tools you already have, I can simplify this to a shorter, tool-matched checklist for you. 🙂

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! 🚚