Quick Overview
The Dodge Challenger serpentine belt-also called the drive belt, accessory belt, or fan belt-loops around several pulleys at the front of the engine and spins everything from the alternator to the air-conditioning compressor. When it's healthy, every accessory runs smoothly; when it slips or snaps, the engine can overheat and the battery can drain fast. Owners should plan on inspecting the belt every oil change and swapping it once wear shows or at the mileage limits below. (Wikipedia, daycoaftermarket.com)
What It Does
A single multi-rib "poly-V" belt saves space and cuts friction compared with older multi-belt systems. It sends crankshaft power to the alternator, water pump, power-steering pump, A/C compressor, and (on supercharged models) the blower. (Wikipedia)
Where It Sits
The belt snakes in a "serpentine" path across smooth and grooved pulleys. A spring-loaded tensioner keeps it tight, and a small idler pulley helps guide the wrap. On all Challenger engines the belt can be reached from the front once the engine cover and splash shield are removed. A 3⁄8-inch drive ratchet (or a serpentine-belt tool) on the tensioner releases slack for removal. (YouTube)
Engine Choices
Belt Sizes
| Engine | Rib Count | Typical Length* | Source |
| 3.6 L V6 | 6 ribs | 65.84 - 84.66 in** | |
| 5.7 L V8 | 6 ribs | 83.25 in | |
| 6.4 L V8 | 6 ribs | 82.10 in | |
| 6.2 L SC V8 | 10 ribs | OEM stock length belt (varies with pulley kits) |
← scroll table horizontally →
* Exact length can vary slightly by model year, pulley options, and aftermarket kits.
** Some V6 cars use two belts; always match the part number to your VIN.
Service Schedule
Modern belts are molded from EPDM rubber, which resists cracking far longer than old neoprene. Dayco's technical guide says start inspections at 60,000 miles and replace the belt and tensioner no later than 90,000 miles even if no damage is visible. (daycoaftermarket.com, Wikipedia) Many factory guides and the Car Care Council echo a 60k-100k mile life window. (MediaRoom, Bayway CDJR)
Wear Signs
Tools & Torque
Basic items: ratchet with long handle, new belt, flashlight, gloves, and a printed routing diagram (under-hood sticker or the owner's manual). When reinstalling:
| Component | Torque Spec | Source |
| 3.6 L V6 tensioner bolt | 24 ft-lb | |
| 5.7 L / 6.4 L idler pulley | 41 ft-lb | (RamForum) |
| 5.7 L automatic tensioner | 30 ft-lb |
|
← scroll table horizontally →
Always thread bolts by hand first and use a calibrated torque wrench to avoid stripping aluminum brackets.
Simple Swap Steps
Pro Tips
Greener Disposal
Belts are rubber; they don't belong in curbside recycling. Programs such as TerraCycle's automotive parts pallet accept old belts, keeping them out of landfills. EPDM belts can also be up-cycled into floor mats or industrial gaskets. The Council of Automotive Maintenance notes EPDM belts can last 160,000 km (≈100,000 miles), reducing waste compared with older materials. (Automotive Training Centre) Researchers add that degraded rubber particles are a minor but growing source of microplastics, so proper disposal matters. (ScienceDirect)
Frequently Asked Questions
Q: How often should I check the belt?
A: Peek at it at every oil change. Look for missing ribs, frays, or shiny spots.
Q: What mileage is "too late" to keep the original belt?
A: Experts recommend replacing around 90,000 miles, even if it still looks fine. (daycoaftermarket.com)
Q: Can I use belt dressing to stop squeaks?
A: Belt sprays are short-term fixes. Persistent squeal usually means wear, mis-alignment, or low tension-replace the belt or tensioner instead. (Crossroads Ford of Wake Forest)
Q: Does the 6.2 L Hellcat use the same belt as other V-8s?
A: No. Supercharged models need a wider 10-rib belt and, in many builds, a separate blower belt. Always match your pulley setup. (797 Performance)
Q: My steering gets heavy and the battery light flashes-could it be the belt?
A: Yes. If the belt slips the power-steering pump slows and the alternator stops charging. Check tension and belt wear right away. (Crossroads Ford of Wake Forest)
Q: What's the correct bolt torque on the 3.6 L tensioner?
A: Tighten to 24 ft-lb. (WAYALIFE Jeep Forum)
Q: Can a broken belt damage the engine?
A: While it usually won't harm pistons or valves, losing coolant flow can overheat the engine in minutes. Stop and shut off the motor immediately. (Wikipedia)
Q: Are aftermarket belts okay?
A: Yes-just be sure the length, rib count, and material meet SAE J1459 standards for automotive V-rib belts. (AmericanMuscle.com)
Q: How can I make the belt last longer?
A: Keep pulleys aligned, replace worn tensioners, and avoid oil leaks that soften rubber. Inspect the belt path for debris after spirited driving on dirt roads.
Using these simple checks and timely replacements will keep your Challenger's accessories humming and your muscle-car adventures worry-free.
Your Go-To Place for Auto Parts!
Shop with confidence and peace of mind
Over 18 years of excellence
Meets or exceeds OE standards