Common 3.6 Pentastar V6 Problems

The 3.6 Pentastar V6 powers a huge share of the Jeep, Ram and Chrysler range. It is a capable engine with a few well-known issues worth understanding.

Early cylinder head failure

The best-known Pentastar issue affects early engines, roughly 2011 to 2013. The left cylinder head, the bank with number 2 cylinder, can fail and cause a misfire, a ticking noise and a flashing check engine light, often without much warning. Chrysler redesigned the head and extended coverage on affected engines. On an early Pentastar, a persistent number 2 misfire should be checked promptly.

Rocker arms and lifters

Later Pentastars can still develop a top-end tick from a failed rocker arm or lifter, which may set a misfire code for the affected cylinder. Caught early it is a contained repair, left to run it can do more damage.

Oil filter housing and cooler leaks

The Pentastar uses a plastic oil filter housing with an integrated cooler. Over time the housing and its seals crack or leak, leading to oil leaks or oil and coolant mixing. It is one of the more common reasons a Pentastar ends up on the hoist. An upgraded housing and fresh seals solve it.

Maintenance

• Keep oil changes on schedule with the correct spec oil.
• Inspect the oil filter housing area for weeping at each service.
• Do not ignore a single-cylinder misfire, especially on early engines.

We service the Pentastar and stock Pentastar parts including filters, coolers and cooling components. Get in touch to book a service.

General information only, not a substitute for a diagnosis on your vehicle.