2024 Ram 1500 — Serpentine Belt Routing & Length

Quick answer

• 2024 Ram 1500 engines vary; belt length, rib count, and part numbers depend on engine (3.6L Pentastar V6 eTorque, 5.7L HEMI V8 with/without eTorque, and TRX 6.2L SC where equipped). Always verify by VIN before ordering.

• 3.6L Pentastar V6 with eTorque (BSG)

  • Rib count: 6‑rib main accessory belt (separate stretch belt for the eTorque/BSG drive)
  • Belt length: varies by pulley package; verify by VIN
  • OEM belt PN: Mopar — verify by VIN with a dealer/parts catalog
  • Aftermarket cross‑refs: Gates K06xxxx; Dayco 506xxxx; Continental/Conti Elite 406xxxx (confirm exact PN by VIN)
  • Automatic tensioner PN: Mopar — verify by VIN; aftermarket available (Gates/Dayco/INA)
  • Idler pulley PN: Mopar — verify by VIN; aftermarket available

• 5.7L HEMI V8 (with or without eTorque)

  • Rib count: 7‑rib main accessory belt (eTorque models also have a separate BSG belt)
  • Belt length: depends on options; verify by VIN
  • OEM belt PN: Mopar — verify by VIN
  • Aftermarket cross‑refs: Gates K07xxxx; Dayco 507xxxx; Continental 407xxxx (confirm exact PN by VIN)
  • Automatic tensioner PN: Mopar — verify by VIN; aftermarket available
  • Idler pulley PN: Mopar — verify by VIN; aftermarket available

• TRX 6.2L Supercharged V8 (if equipped for 2024): unique multi‑belt system (supercharger and accessory belts). Do not use the routing below; confirm parts and routing by VIN and service info.

Tip: On modern Rams, the correct belt/tensioner/idler part numbers are VIN‑specific. Call a Mopar parts counter with your VIN or use a reputable catalog to lock in the exact Mopar number and matching Gates/Dayco/Continental equivalents.

Belt routing

Photograph the existing belt on the truck before removal. If your 2024 Ram 1500 has the standard single accessory belt (not the TRX), the typical routing follows this path when viewed from the front of the engine:

1. Start at the crankshaft pulley (harmonic balancer)
2. Up and around the A/C compressor
3. Across to the idler pulley
4. Over the alternator
5. Down to the power steering pump
6. Around the water pump
7. Under the automatic tensioner, then back to the crankshaft pulley

Note: Minor bracket/pulley location changes exist between the 3.6L and 5.7L layouts, but the component order above (crank → A/C → idler → alternator → power steering → water pump → tensioner → back to crank) is the standard path for the accessory drive belt. eTorque models also have a separate stretch belt for the belt‑starter‑generator (BSG) that does not follow this path.

How to replace the serpentine belt

Tools

• Serpentine belt tool or a long 3/8‑inch breaker bar to relieve the tensioner
• Basic sockets for splash shield/air duct removal if needed
• For eTorque BSG stretch belt (if replacing): a stretch‑belt installation tool is required; do not pry it on with a screwdriver

Steps

1. Safety first: Disconnect the negative battery cable if you’ll be working near the BSG or starter circuits. Set the parking brake.
2. Photograph the belt routing. If the under‑hood decal is missing, your photo is your map.
3. Insert the 3/8‑inch tool into the tensioner’s square drive and rotate the tensioner to release tension.
4. Slip the belt off the smooth‑face idler or alternator last (easiest point of removal) and remove the old belt.
5. Spin the idler and tensioner pulleys by hand. If they feel rough, wobbly, or noisy, replace them now. Check the tensioner arm for smooth, spring‑loaded movement without binding.
6. Route the new belt according to the path above, leaving the easiest upper pulley for last. Ensure the ribs are fully seated in every grooved pulley.
7. Rotate the tensioner again and slip the belt over the final pulley. Release the tensioner slowly and verify alignment.
8. Start the engine and observe for 30–60 seconds. The belt should run true with no chirping or wandering. Recheck after a short test drive.

eTorque note: If you are also replacing the BSG stretch belt, follow the Mopar procedure with the correct install tool. Never reuse or twist a stretch belt, and never lever it on with a screwdriver—doing so can damage the belt and pulleys.

Replacement interval

• Inspect at every oil change and replace around 90,000–120,000 miles or 6–8 years, whichever comes first. High heat, dust, fluid contamination, or heavy accessory loads can shorten life.
• The BSG stretch belt on eTorque models should also be inspected regularly and replaced at the first sign of wear or noise; it’s not designed to be reused once removed.

Signs of a failing belt or tensioner

Belt

• Squeal/chirp on cold start or when accessories engage
• Cracks across the ribs, chunking, fraying, glazing/shiny ribs, or rubber dust
• Power steering assist feels heavy, battery/charging light flickers, or engine runs hot (water pump not turning correctly)

Tensioner/Idler

• Belt flutter at idle, tensioner arm bouncing, or misalignment
• Grinding/rumbling from idler or tensioner pulley; pulley wobble
• Belt wear returning quickly after replacement (points to a weak or misaligned tensioner)

Engine‑option variation

• 3.6L Pentastar V6 eTorque: 6‑rib main belt plus separate BSG stretch belt. Routing above applies to the main accessory belt only.
• 5.7L HEMI V8: 7‑rib main belt; eTorque versions add a separate BSG belt. Pulley locations differ slightly but the order above holds.
• TRX 6.2L supercharged V8: Multiple belts with unique routing; consult OE diagrams by VIN.

Before ordering parts, always confirm the exact OEM Mopar part numbers and matching Gates/Dayco/Continental references by VIN to ensure correct rib count and length for your build (A/C, eTorque, and pulley variations change fitment).

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