2018 Jeep Wrangler 3.6L Engine Replacement Cost

A 2018 Jeep Wrangler 3.6L engine replacement usually means a used Pentastar V6 — used units run about $1,854–$2,318 for the part itself, and remanufactured units run about $6,020. The Pentastar is proven; rocker-arm tick is the symptom that decides the repair.

Rocker-arm and lifter tick A ticking noise from the top of the engine — especially on cold start — is the classic Pentastar rocker-arm symptom. Worn rocker arms and lifters tick, then cause misfires as they wear further. Caught early it is a component repair; ignored, it wears the camshaft and becomes an engine replacement.

Oil cooler housing leaks Oil pooling in the valley of the engine, or oil dripping down the back of the block, usually means the plastic oil cooler/filter housing has cracked or its seals have failed. It is a common Pentastar leak and a component repair — but a leak that runs the engine low on oil accelerates wear everywhere.

Oil consumption at high mileage Oil consumption that climbs steadily past 150,000 miles usually means ring and valve-seal wear. Consumption that stays stable and modest is normal aging; consumption that keeps climbing points to internal wear and a replacement decision.

For the part itself, a used 3.6L Pentastar for the 2018 Wrangler runs about $1,854–$2,318, and a remanufactured unit runs about $6,020. Pricing moves with mileage and availability. Add installation labor, freight, and a refundable core charge on remanufactured units. A remanufactured unit costs more but arrives with the stronger warranty: up to 5 years with unlimited miles, parts and labor, versus up to 5 years or 50,000 miles parts-only on a used unit. See the live stocked units for this Wrangler at peakpowertrain.com/engines/jeep/jeep-wrangler/2018.

A used 3.6L Pentastar is the lower-cost path and a first-class option here: a pull from a donor vehicle, inspected and documented with mileage, that gets a solid vehicle running again without a large outlay. It carries up to 5 years or 50,000 miles of parts-only coverage. A remanufactured 3.6L Pentastar is fully disassembled, inspected, and rebuilt to specification with new wear components and tested before it ships. It costs more, but it arrives with the stronger warranty — up to 5 years with unlimited miles, parts and labor — and it is the smarter long-term choice if you plan to keep the vehicle for years. Either way, confirm the VIN, the engine code, and 2WD versus 4WD before you order, and have a licensed shop do the install. See the live stocked units for this 2018 Jeep Wrangler at peakpowertrain.com/engines/jeep/jeep-wrangler/2018.

We back every engine we sell, and the two warranties are different in a way that matters when you choose. A remanufactured engine carries up to 5 years of coverage with unlimited miles (gasoline, non-commercial, 2001 and newer), parts and labor included, with labor reimbursed at $50 per hour per the Mitchell labor guide after an approved claim. A used engine carries up to 5 years or 50,000 miles, parts only, with no labor reimbursement. Both require installation by a Licensed Automotive Repair Facility, and used units must be installed within 14 business days of delivery with the heat tabs intact. Remanufactured units also carry a refundable core charge, returned when your old engine comes back to us.

Replacement is the right move when the failure is isolated to the engine and the rest of the vehicle is worth saving — solid body and frame, good tires, no major suspension or electrical issues. A quality used or remanufactured engine can extend the life of an otherwise good vehicle by years at a fraction of the cost of a replacement vehicle. Get an honest assessment first: if the vehicle also needs major work elsewhere, or the repair cost approaches the vehicle's value, the math changes. Proper diagnosis from a trusted mechanic is the essential first step — don't replace what doesn't need replacing, but don't pour repair money into an engine that is already mechanically compromised.

• Warranty policy and Expedia Protection: /warranty
• Check engine light after engine swap: /blog/check-engine-light-after-engine-swap
• Engine misfire after replacement: /blog/engine-misfire-after-replacement
• Lifter tick after engine replacement: /blog/lifter-tick-after-engine-replacement
• Used and reman engines: /used-engines
• Core return process: /core-return