2019 Ram 3500 Serpentine Belt Routing & Length

Quick answer:

• Belt Length & Rib Count: The 2019 Ram 3500 (with the 6.4L HEMI engine) typically uses a 6-rib belt, approximately 99.5 inches in length. (Note: Specific length can vary slightly based on engine option and accessories. Always confirm with your vehicle's existing belt or parts supplier.)
• OEM Belt PN: 68261358AC
• Aftermarket Cross-references:
  • Gates K060995
  • Dayco 5060995
  • Continental Elite 4060995
• Auto-Tensioner PN: 68060371AB
• Idler Pulley PN: 53013896AD

Belt Routing

Before you begin any work, always take a clear photo of your existing serpentine belt routing. This will serve as an invaluable reference during reinstallation, especially since we cannot provide a visual diagram here. The routing for the 2019 Ram 3500 (6.4L HEMI) generally follows this path:

1. Begin at the crankshaft pulley (the lowest, central pulley).
2. From the crankshaft, the belt typically goes up to the A/C compressor pulley (usually on the lower passenger side).
3. From the A/C compressor, the belt routes to the idler pulley (often a smooth pulley, helping guide the belt).
4. From the idler, the belt then routes up to the alternator pulley (usually high on the driver's side).
5. Next, the belt goes to the power steering pump pulley (commonly located low on the driver's side).
6. From the power steering pump, it engages the water pump pulley (often central and higher than the crankshaft).
7. Finally, the belt runs to the automatic tensioner pulley (this is the pulley that moves to allow belt installation/removal), which applies tension to the belt system. The belt may then return to the crankshaft to complete the loop, or loop around other pulleys not explicitly mentioned in this general path.

Keep in mind that specific accessory configurations can minorly alter the exact path. Reference your photograph and the underhood diagram (if present) to confirm your specific routing.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your 2019 Ram 3500 is a manageable DIY task, though it requires the right tools.

1. Safety First: Ensure the engine is off and cool. Disconnect the negative battery terminal to prevent accidental starting.
2. Locate the Tensioner: Identify the automatic serpentine belt tensioner. It will have a square drive hole (often 3/8-inch or 1/2-inch).
3. Release Tension: Insert a serpentine belt tool or a long 3/8-inch or 1/2-inch drive breaker bar into the square hole on the tensioner. Rotate the tensioner clockwise or counter-clockwise (depending on its pivot point, you'll feel which way releases tension) to relieve the belt tension. Hold it in this position.
4. Remove Old Belt: While holding the tensioner, carefully slip the old belt off one of the pulleys (the idler or alternator is often easiest).
5. Inspect Pulleys: With the belt removed, check all pulleys (alternator, power steering, water pump, A/C, idler, tensioner) for any excessive play, noise, or damage. Spin them by hand; they should turn smoothly with minimal resistance. Replace any worn pulleys.
6. Route New Belt: Refer to your earlier photograph and the routing description. Route the new belt around all pulleys except for the final pulley that will be easiest to slip the belt over while the tensioner is released (again, often the idler or alternator).
7. Apply Tension: Once the belt is mostly in place, use your serpentine belt tool or breaker bar to again release the tensioner. Slip the belt over the last pulley. Slowly release the tensioner, ensuring the belt seats correctly in all grooves of all pulleys. Double-check that the belt is properly aligned on all pulleys and not off-track.
8. Final Checks: Reconnect the battery. Start the engine and let it run for a minute or two, observing the belt's operation. Listen for any squealing or unusual noises. Turn the steering wheel lock-to-lock to check the power steering, and test the A/C.

Replacement Interval

For most modern vehicles, including the 2019 Ram 3500, a serpentine belt typically lasts between 60,000 to 100,000 miles, or about 4-6 years. However, it's crucial to inspect the belt regularly, especially after 40,000 miles or if you drive in severe conditions. Some manufacturers recommend inspecting every oil change.

Signs of a Failing Belt or Tensioner

Don't wait for your belt to break! Be attentive to these warning signs:

• Squealing or Chirping Noises: This is the most common sign. A loose, worn, or misaligned belt, or a failing tensioner or pulley bearing, can cause these sounds, especially on startup, during turns, or when accessories like the A/C are on.
• Visible Cracks, Fraying, or Glazing: Inspect the top and underside of the belt. Small, superficial cracks are often normal, but deep cracks, missing chunks, fraying edges, or a shiny/glazed appearance indicate the belt's material is degrading and losing its grip.
• Loss of Power Steering, A/C, or Charging: Since the serpentine belt drives these accessories, a broken or severely slipping belt will result in a loss of power steering assist, warm air from the A/C, and potentially a battery warning light (due to the alternator not charging).
• Overheating Engine: On some vehicles, the serpentine belt also drives the water pump. A broken belt or severely slipping belt can lead to engine overheating.
• Vibrations or Wobbling Pulleys: A failing tensioner or idler pulley might wobble or vibrate excessively. This can lead to belt misalignment and premature wear.
• Grinding or Growling Noises: These sounds often point to a failing bearing within one of the pulleys or the tensioner itself.

Addressing these issues promptly can prevent a breakdown and more costly repairs. Always ensure you're using the correct belt for your specific engine configuration.

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