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When considering dependable engines, you might typically think of a compact, four-cylinder engine produced by an international automaker. Surprisingly, a V6 Chrysler engine is probably one of the last options that come to mind. However, as demonstrated by a mechanic who dissected a 626,000-mile Pentastar 3.6-liter engine, it’s often the unexpected that proves to be the most resilient.
The story begins with the beating heart of a 2014 Ram Promaster. This cargo van, which has accumulated enough miles to circle the Earth’s moon and make a return trip, finally ceased functioning after a lengthy six-year journey on the road. Throughout this period, the Promaster averaged approximately 285 miles per day until the six-cylinder engine encountered a malfunction that necessitated an engine service.
According to the owner’s video on YouTube, the van started to run unevenly and displayed error codes related to engine timing. Upon removing the engine, the owner decided to delve deeper into the failure to assess how well the engine had sustained itself over its extended lifespan. The findings were nothing short of astounding.
Upon investigation, the owner found that the issue was indeed related to the Pentastar’s timing. Over time, the plastic chain guides deteriorated, and the tensioners exceeded their operational lifespan. Consequently, it seemed that the engine had experienced timing misalignment.
However, this appears to have been the sole major breakdown. The oil pump remained in excellent condition, the cylinder walls retained their original crosshatching, and even the rod bearings seemed to have some life left before wearing through the outermost alloy layer. Remarkably, the owner stated that the Pentastar didn’t consume oil and ran smoothly until its eventual failure.
The owner’s secret to this success? As you might have guessed: consistent maintenance. He changed the vehicle’s oil every 8,000 miles (admittedly sometimes beyond) using only Valvoline or Mobil1 lubricants.
This remarkable longevity underscores the reliability of certain modern engines, particularly one that Chrysler claims possesses the “characteristics of a lasting icon”—indicating it is likely here to stay for the foreseeable future.
While the platform may provoke debate, the Pentastar remains highly sought after within Chrysler’s range. With over 10 million units produced since the engine’s launch in 2011 across Fiat Chrysler’s Trenton South, Saltillo South, and Mack Engine facilities, the Pentastar has been featured in 22 different vehicles—whether in 3.0-liter, 3.2-liter, or 3.6-liter variations (with the latter being the most prevalent). Even today, one can purchase a new Chrysler 300, Chrysler Pacifica, Jeep Gladiator, Jeep Grand Cherokee, Ram 1500, or numerous other FCA vehicles powered by this formidable engine.
If you’ve invested in the entire vehicle, it’s wise to make the most of it—especially when it has the potential to endure multiple journeys around the globe.
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