A Complete Guide to the 2011-2018 Ram 3500 Serpentine Belt Drive Component Kit
Hearing squeals or chirps from your engine? Your serpentine belt components may be wearing out.
- Replace the belt, tensioner, and idler pulleys together as a complete kit to ensure reliability.
- Noises like squealing, chirping, or grinding are the earliest and most common signs of a failing component.
- High-quality aftermarket kits from brands like Gates are a cost-effective and reliable alternative to more expensive OEM parts.
- If the belt breaks, the truck is not drivable and will overheat, potentially causing major engine damage.
Is Your Ram 3500 Making Engine Noises?
If you hear a squealing, chirping, or grinding sound coming from the front of your engine, it's a common sign that your serpentine belt system needs attention. These parts work hard, especially on the powerful Cummins and Hemi engines, and they wear out over time. The noise you hear is often from a worn-out bearing in the tensioner or an idler pulley 🎬 Watch: How to identify clicking noises from your tensioner and pulleys., or from the belt itself slipping because it's old or the tensioner is weak. Ignoring these sounds can lead to bigger problems, so it's smart to inspect the system.
Symptoms of a Failing Serpentine Belt System
Besides noise, there are other signs that point to a problem. Look at the belt itself for cracks, frayed edges, or a shiny, glazed appearance. You might also notice that accessories are not working right. For example, your headlights may dim, the power steering might feel heavy, or the A/C could stop blowing cold. In a worst-case scenario, if the belt breaks, your engine will quickly overheat because the water pump will stop working, and you will lose your power steering and charging system.
Critical Failure Warning
If the serpentine belt breaks, your truck will not be drivable. The loss of the water pump will cause the engine to overheat rapidly, which can lead to severe engine damage. You will also lose power steering and the alternator will stop charging the battery.
Choosing the Right Aftermarket Kit: OEM vs. Aftermarket
When it's time for a replacement, you can choose between an original equipment manufacturer (OEM) Mopar part or an aftermarket kit. For the 2011-2018 Ram 3500, high-quality aftermarket kits from brands like Gates offer excellent performance and value. These kits are convenient because they include the belt, tensioner, and idler pulleys all in one box, which is the correct way to do the job. Mechanics recommend replacing all these components together because they wear at a similar rate. Putting a new belt on old, worn pulleys can cause the new belt to fail early.
Gates is a popular and trusted brand for these trucks. They offer standard kits and heavy-duty "FleetRunner" kits, which feature a more durable green-colored belt that many Cummins owners prefer. While most experiences with Gates are positive, it's worth noting that like any brand, quality can vary, and some users have reported issues. However, for this application, Gates is generally considered a reliable choice that meets or exceeds OEM quality.
Pro Tip: Cummins vs. Hemi
The serpentine belt system is different for the 6.7L Cummins diesel and the 5.7L/6.4L Hemi gas engines. Make sure you buy the kit that is specifically listed for your truck's engine. The routing of the belt and the components themselves are not interchangeable.
Estimated Replacement Costs
The cost can vary depending on whether you do the work yourself or take it to a shop. The parts themselves are affordable, but labor can add to the total cost.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Kit (e.g., Gates) | $151.44 - $328.32 |
| New OEM Kit (Mopar) | $350 - $700+ |
| Shop Labor | $150 - $350 |
Cost estimates are approximate and can vary based on your location and the specific parts chosen. OEM tensioner prices can be particularly high.
Known Issues, Recalls, or Service Bulletins
Searches of the National Highway Traffic Safety Administration (NHTSA) database show no specific recalls or technical service bulletins (TSBs) for the serpentine belt, tensioner, or idler pulleys on the 2011-2018 Ram 3500. While recalls exist for other parts of these trucks, the accessory drive system has not been the subject of a specific safety campaign.
Frequently Asked Questions (FAQ)
Can I replace the serpentine belt kit myself?
Yes, this is a job many truck owners do themselves. It is considered moderately difficult. For the 6.4L Hemi, access is fairly open. 🎬 See this step-by-step serpentine belt kit replacement for Hemi V8 engines. For the 6.7L Cummins, the space is much tighter, and it can be frustrating to route the new belt around the fan and pulleys. 🎬 Watch: This clever bungee cord hack makes Cummins belt installation easy. You will need a good ratchet set and a long breaker bar or a dedicated serpentine belt tool to release the tensioner.
How often should the serpentine belt and components be replaced?
Many manufacturers, including Ram, recommend inspecting the belt around 100,000 miles. There is no exact replacement interval, but it's good practice to replace the entire kit if you notice noise, visible wear, or as preventative maintenance between 100,000 and 150,000 miles.
Should I get a kit or just replace the belt?
Always get the full kit. The tensioner and idler pulleys have bearings that wear out. A failed pulley can shred a brand-new belt, leaving you stranded. Replacing everything at once saves you from having to do the job again in the near future and ensures all parts of the system are fresh.
What happens if a pulley bearing seizes?
If a pulley bearing locks up, it will create extreme friction on the belt. This will either cause the belt to snap immediately or it will melt and break. Either way, the result is the same: all your belt-driven accessories will stop working instantly.
Helpful Videos
Technical Specifications
Kit components vary by engine (6.7L Cummins vs. 5.7L/6.4L Hemi). A standard kit includes one serpentine belt, one tensioner assembly, and at least one idler pulley. Always verify the kit is correct for your specific engine before purchasing.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ram 3500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Ram 3500 Making Engine Noises?
- Symptoms of a Failing Serpentine Belt System
- Critical Failure Warning
- Choosing the Right Aftermarket Kit: OEM vs. Aftermarket
- Pro Tip: Cummins vs. Hemi
- Estimated Replacement Costs
- Known Issues, Recalls, or Service Bulletins
- Frequently Asked Questions (FAQ)
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