2017 Ford Explorer Belt Diagram Guide for Proper Installation and Maintenance

Locate the correct belt routing immediately: For the 2017 Ford Explorer, the serpentine belt wraps around the alternator, power steering pump, water pump, and air conditioning compressor in a specific pattern. Using the factory belt diagram ensures proper tension and prevents premature wear.

Identify key components visually: The diagram clearly marks the crankshaft pulley at the bottom center, with the tensioner positioned near the top right. Confirming these locations before removing the old belt reduces installation errors and avoids misalignment that can strain engine accessories.

Follow tensioner instructions carefully: The belt tensioner on the 3.5L V6 engine requires a 3/8-inch drive ratchet to release tension safely. Move the tensioner slowly while sliding the belt into place to maintain proper alignment and prevent slipping during startup.

Check routing differences by engine type: Models with the 2.3L EcoBoost engine have a slightly different belt path, especially around the idler pulley and air conditioning compressor. Consulting the diagram for your specific engine avoids incorrect routing and unnecessary adjustments.

Inspect the belt and pulleys during installation: Look for cracks, fraying, or glazing on the old belt and confirm all pulleys spin freely without noise. Aligning the belt with the factory diagram ensures optimal performance and reduces the risk of sudden engine accessory failure.

2017 Ford Explorer Belt Diagram Guide

Locate the serpentine belt on your 2017 Ford Explorer by identifying the tensioner pulley near the engine’s front. Use the diagram in the owner’s manual or under the hood sticker to trace the belt path around the alternator, water pump, power steering pump, and AC compressor. Ensure the belt aligns precisely with each pulley groove to prevent slippage and premature wear.

Release tension with a wrench on the tensioner pulley, then remove the old belt. Compare the new belt with the removed one to confirm length and rib alignment. Follow the diagram carefully during installation, looping the belt over the crankshaft pulley first, then routing around accessories in the correct sequence.

Check belt tension manually after installation by pressing at the midpoint between pulleys; a proper belt flex is about half an inch. Start the engine briefly and observe for any misalignment or noise. Adjust the routing if the belt tracks improperly or squeals.

Keep the belt diagram handy for future maintenance. Inspect the belt periodically for cracks, fraying, or glazing, and replace it within recommended mileage intervals to maintain optimal engine performance and accessory operation.

Identifying the Correct Serpentine Belt Routing for Your Engine

Locate the belt routing diagram under the hood or in the owner’s manual to confirm the correct path for the serpentine belt. For a 2017 Ford Explorer with a 3.5L V6 engine, the belt wraps around the crankshaft pulley, alternator, power steering pump, A/C compressor, and tensioner in a clockwise pattern. Align the belt with each pulley groove, ensuring it sits flush without twisting.

Check the tensioner before installation; it must provide sufficient pressure to prevent slipping. If the tensioner is weak, replace it alongside the belt. For engines with a 2.3L EcoBoost, the routing differs slightly, requiring the belt to pass under the idler pulley near the A/C compressor before reaching the alternator.

Trace the diagram step by step while installing the belt. Start at the crankshaft pulley, loop the belt around the largest accessory pulley next, and continue sequentially. Once the belt is in place, rotate the crankshaft by hand to verify proper alignment and smooth operation across all pulleys.

Keep a photo or sketch of the routing for future reference. Misrouting can cause belt wear, noise, or accessory failure. Always double-check that the belt grooves match the pulleys’ grooves, and tension is consistent across the system before closing the hood.

Replacing the Alternator and AC Belt Step by Step

Loosen the serpentine belt tensioner using a 3/8-inch ratchet to relieve tension. Slide the belt off the alternator pulley first, then remove it from the AC compressor pulley.

Disconnect the negative battery terminal to prevent electrical shorts. Remove the alternator’s electrical connections, including the main power cable secured with a 10mm nut and the plug harness clip.

Unbolt the alternator from the mounting brackets. The upper bolt requires a 13mm socket, while the lower pivot bolt needs a 15mm socket. Carefully lift the alternator out of the engine bay.

Position the new alternator in place, aligning the mounting holes. Insert and tighten the pivot and upper bolts to 35-40 ft-lbs torque. Reconnect the electrical plug and the main power cable securely.

Route the new serpentine belt over the pulleys following the belt diagram specific to the 2017 Ford Explorer:

• Start at the crankshaft pulley.
• Loop around the AC compressor and idler pulleys.
• Pass over the alternator and tensioner last.

Use the ratchet to move the tensioner and slide the belt into place. Double-check that the belt sits fully in all pulley grooves without twisting.

Reconnect the negative battery terminal. Start the engine and observe the belt for smooth operation and proper alignment. Listen for any unusual noises and ensure both the alternator and AC function correctly.

Troubleshooting Common Belt Alignment and Tension Issues

Check the serpentine belt for proper alignment immediately if you hear squealing or notice uneven wear. Use a straightedge along the pulleys to ensure the belt runs parallel without twisting. Misalignment often occurs from worn idler pulleys or a loose tensioner. Replace any pulleys with visible grooves, wobble, or excessive play.

Measure belt tension using a calibrated gauge; a 2017 Ford Explorer typically requires 125–150 lbs of deflection force at the midpoint of the longest span. Over-tight belts strain bearings and under-tight belts slip, causing noise and reduced accessory performance. Adjust the automatic tensioner or, if it’s failing, replace it to restore correct tension.

Inspect the belt’s edges for fraying, glazing, or cracks. Edge wear usually signals pulley misalignment, while glazing indicates slippage. If the belt shows these signs, swap it out instead of attempting temporary fixes. Always rotate pulleys by hand before reinstallation to confirm smooth movement and absence of binding.

Listen for chirping or squeaking during engine startup and under load. Isolate the sound by running the engine briefly with a mechanic’s stethoscope or a long screwdriver placed against pulleys. Targeted inspection helps pinpoint tensioner or pulley faults without unnecessary replacements.

Check accessory components like the alternator, AC compressor, and power steering pump for lateral play. Even a small shift can throw the belt off track. Tighten mounting bolts to manufacturer torque specs and verify pulley alignment afterward. Re-inspect tension after adjustments to confirm consistent performance.