Description
Aftermarket accessory drive belt tensioner for Detroit Diesel DD13, DD15, and DD16 engines — the front-of-engine 10-rib serpentine tensioner. A4722001370 supersedes the earlier A4722001070 (EA4722001070) and the later A4722001570 / A4722001670 family. Detroit revised the tensioner across model years with revised pulley diameters; this one fits Freightliner Cascadia, Coronado, M2 (with DD13), Western Star 4700 / 4800 / 4900, and earlier Century / Columbia chassis equipped with DD13 or DD15.
Signs You Need a New Belt Tensioner
- Squeal or chirp from the front of the engine, especially under load
- Visible belt slip, glazing, or rapid edge wear
- Pulley wobble or play when the engine is off
- Rust streaks, leaking grease, or seized hydraulic damper at the tensioner arm
Specifications
| Manufacturer | World American |
|---|---|
| Part Number | A4722001370 |
| Part Type | Accessory Drive Belt Tensioner, 10-rib |
| Engine Compatibility | Detroit Diesel DD13, DD15, DD16 |
| Pulley Width | 1.574″ / 1.250″ |
| Pulley OD | 2.952″ / 2.834″ / 2.755″ |
| Number of Grooves | 10 |
Cross References
This belt tensioner replaces or is equivalent to the following part numbers:
- Detroit Diesel: A4722001370, A4722001070, EA4722001070, A4722001570, A4722001670, A4722000970, A4722000570, A4722000270, A4722000170
- PAI Industries: 680331 (new), 680331EX (reman)
- Gates: 38667, GA38667
- Also known as: GY49603, TF/DDEEA4722001070
Applications
This tensioner fits the accessory drive on the following engines:
- Detroit Diesel DD13 12.8L (2008–present)
- Detroit Diesel DD15 14.8L (2008–present)
- Detroit Diesel DD16 15.6L (2011–present)
Representative vehicles using these engines:
- Freightliner Cascadia (2008–2017) with DD13 / DD15
- Freightliner Century (2008–2009), Columbia (2009, 2013), Coronado (2010–2016)
- Freightliner FL114 SD (2011–2017), M2 (2011–2016) with DD13
- Western Star 4700 / 4800 / 4900 with DD13 / DD15 / DD16
Detroit revised the tensioner across the production run; verify your engine serial number / build date before ordering — the supersession chain is not always backward-compatible without changing the belt as well.
