2012–2018 Jeep Wrangler 3.6L Pentastar V6 Engine Repair
The 3.6L Pentastar replaced the 3.8L V6 in the Wrangler for 2012 and was the only gas engine in the JK through 2018.
At a glance
Year-specific notes
- 2012 — 2012 is the first Pentastar Wrangler year.
How to confirm your engine
- The 8th VIN digit is "G" on 3.6L Pentastar Wranglers.
- 2011 and earlier JKs have the 3.8L, not the Pentastar.
Common 3.6L Pentastar V6 failure areas in the Wrangler
Early Pentastar cylinder head valve-seat problems, notably cylinder 2.
Oil cooler / filter housing leaks in the valley.
Rocker arm and lifter wear.
Diagnostic considerations
- Misfire counters
- Compression and leak-down
- Oil cooler housing inspection
Repair, rebuild or replace?
Many problems — a lifter, a gasket, a sensor or ignition part — can be repaired without replacing the engine. When there is internal damage we compare repair, rebuild and replacement with you, based on what inspection shows and how long you plan to keep the vehicle.
Related repair topics
Left cylinder head valve-seat problems on early Pentastar engines.
Oil cooler / filter housing leaks on the Pentastar.
Misfire diagnosis on the Pentastar.
How we decide between repairing, rebuilding or replacing a 3.6L Pentastar with major internal damage.
Other Wrangler generations with the 3.6L Pentastar V6
Request a quote for your 2012–2018 Jeep Wrangler
Frequently asked questions
How do I know my Wrangler has the 3.6L Pentastar V6?
The 8th VIN digit is "G" on 3.6L Pentastar Wranglers. 2011 and earlier JKs have the 3.8L, not the Pentastar.
Should I repair, rebuild or replace the engine?
Many problems — a lifter, a gasket, a sensor or ignition part — can be repaired without replacing the engine. When there is internal damage we compare repair, rebuild and replacement with you, based on what inspection shows and how long you plan to keep the vehicle.
Can you give a price over the phone?
We diagnose before quoting because engine repair scope varies widely. Call 602-725-6800 or request a quote to get started.