Chrysler PowerTech 3.7 V6
3.7 L · V6 · naturally aspirated · petrol · 2002–2012
Also known as: 3.7 v6, ekg, powertech v6, 3.7 magnum, 3.7 liberty engine
The V6 derived from the PowerTech V8 — essentially that engine with two cylinders removed — fitted to the Liberty, Grand Cherokee, Dakota, Nitro and Ram until the Pentastar replaced it.
It shares its parent's sensitivity and its parent's failure modes. Valve-seat wear and dropped valve seats are the fault it is specifically known for, presenting as a misfire and low compression on one cylinder with no obvious external cause, and often after an overheat. Once a seat has moved, the head is generally scrap.
As with the 4.7, sludge from neglected oil changes is behind much of the camshaft and rocker wear that these engines show, and the rocker arms in particular are a known noise source. It is not a fragile engine when maintained, but it punishes neglect more than its contemporaries do — which makes service records the most useful thing a seller can produce.
Cars fitted with this engine
3 generations, across 2 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Posted about this engine
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about PowerTech 3.7 V6.