2017 Ram ProMaster Serpentine Belt Reference

Quick Answer

• Belt Length: 2370mm (approx. 93.3 inches)
• Rib Count: 6-Rib
• OEM Belt Part Number: 04891739AB (Mopar)
• Aftermarket Cross-references:
  • Gates K060933
  • Dayco 5060930
  • Continental Elite 4060933
• Auto-Tensioner Part Number: 04891741AC (Mopar)
• Idler Pulley Part Number: 04891742AC (Mopar)

Belt Routing (3.6L V6 Engine)

Before you begin any work, it is highly recommended to take a clear photograph of the existing belt routing. This will serve as an invaluable reference during reinstallation.

The serpentine belt on your 2017 Ram ProMaster (3.6L V6 engine) follows a specific path around various components. Starting from the crankshaft pulley, the belt typically routes as follows:

1. Crankshaft Pulley: The belt originates from the crankshaft, which provides the rotational power.
2. A/C Compressor: From the crankshaft, the belt goes up and around the air conditioning compressor pulley.
3. Idler Pulley: After the A/C compressor, the belt may pass over an idler pulley, which helps guide the belt and maintain proper tension.
4. Alternator: The belt then routs to the alternator pulley, which charges the battery and powers electrical systems.
5. Power Steering Pump: Next, the belt typically engages with the power steering pump pulley, assisting in steering.
6. Water Pump: The belt will then wrap around the water pump pulley, circulating coolant throughout the engine.
7. Auto-Tensioner: Finally, the belt loops around the auto-tensioner pulley, which maintains constant tension on the belt.

Note: The exact routing can vary slightly based on specific engine configurations or optional accessories. Always double-check your vehicle's specific routing before removal.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your ProMaster requires a few basic tools and careful attention. The primary tool you'll need is a serpentine belt tool or a 3/8" drive breaker bar to release tension from the auto-tensioner.

1. Locate the Auto-Tensioner: Identify the automatic belt tensioner. It will have a square opening for a 3/8" drive tool or a specific lug for a serpentine belt tool.
2. Release Tension: Insert your serpentine belt tool or 3/8" breaker bar into the tensioner and rotate it clockwise (or counter-clockwise, depending on the design) to relieve tension on the belt. This will allow you to remove the belt from the pulleys.
3. Remove Old Belt: While holding the tensioner in the released position, carefully slip the old belt off the pulleys, starting with an easy-to-reach pulley like an idler.
4. Inspect Pulleys: With the belt removed, inspect all pulleys for any signs of wear, damage, or excessive play. Ensure they spin freely and quietly.
5. Route New Belt: Following the photograph you took earlier, carefully route the new belt around all the pulleys, leaving the tensioner pulley for last or a pulley that offers easy access to slip the belt on.
6. Tension and Verify: Once the belt is mostly in place, use the serpentine belt tool or breaker bar to release the tensioner again and slip the belt over the final pulley. Slowly release the tensioner, ensuring the belt seats correctly in all grooves on all pulleys. Double-check the routing one more time before starting the engine.

Replacement Interval

The serpentine belt in your 2017 Ram ProMaster typically has a recommended replacement interval of around 60,000 to 100,000 miles, or every 4 to 6 years, whichever comes first. However, it's crucial to inspect the belt regularly (e.g., during oil changes) for any signs of wear, cracking, fraying, or glazing. If you notice any of these issues, replace the belt immediately, regardless of mileage or age.

Signs of a Failing Belt or Tensioner

Several symptoms can indicate a failing serpentine belt or tensioner. Addressing these issues promptly can prevent more extensive damage and breakdowns.

Signs of a Failing Serpentine Belt:

• Squealing or Chirping Noises: This is one of the most common signs, especially when starting the engine, accelerating, or in wet conditions. It indicates the belt might be slipping.
• Visible Cracks or Fraying: Inspect the belt's surface for cracks, missing ribs, or frayed edges. These are clear indicators of wear.
• Glazing: A shiny or glossy appearance on the belt surface suggests it's hardened and losing its grip.
• Loss of Power to Accessories: If the belt breaks or slips significantly, you might notice the power steering becoming heavy, the A/C blowing warm air, or the battery warning light illuminating (due to the alternator not charging).

Signs of a Failing Automatic Tensioner:

• Excessive Belt Slack: The tensioner's primary job is to keep the belt taut. If the belt appears unusually loose or experiences excessive vibration, the tensioner might be failing.
• Squealing Noises: A worn tensioner pulley bearing can also cause squealing or grinding noises.
• Uneven Belt Wear: A failing tensioner can lead to uneven wear on the belt due to improper tension.
• Tensioner Arm Movement: While the engine is running, observe the tensioner arm. Excessive bouncing or vibration indicates it's not maintaining stable tension.

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