JEEP CHEROKEE SRT8 6.1L ENGINE

The 6.1‑liter “SRT8” HEMI V8 emerged as the powerhouse option in the JEEP CHEROKEE SRT8 6.1L ENGINE when it debuted for model year 2006 (on the WK‑generation, 2005‑2011). Though used in other Chrysler‑branded SRT cars like the Charger, 300C, and Challenger, the version installed in the Grand Cherokee was tuned specifically for SUV duty 

• Production years: 2006 through 2010 (in Jeep Grand Cherokee SRT‑8)

• Engine code: ESF. A V8 OHV (pushrod) design with 16 valves, multi‑port injection, and forged internals (crank, rods, pistons) built for durability and performance

It was replaced in the next-gen WK2 SRT model by the larger JEEP CHEROKEE SRT8 6.1L ENGINE , but the 6.1 remains a favorite for enthusiasts due to its raw sound, classic HEMI character, and relative simplicity

 Engine Specifications & Performance

Technical Breakdown:

The JEEP CHEROKEE SRT8 6.1L ENGINE  delivers a factory-rated 420 hp at around 6,000–6,200 rpm and 420 lb·ft (≈569 Nm) at 4,800 rpm  On European spec it’s quoted as 419 BHP ≈ 425 PS

• Bore × stroke: ~103 mm × 90.9 mm; compression ratio ~10.3 :1

• Rev‑limit ~6,400 rpm, oil squirters, high‑load rods, tuned intake and exhaust manifolds, dual knock sensors to manage performance and reliability

• Transmission: Mercedes‑derived 5‑speed automatic (NAG1 W5A580) with AWD transfer case (NV146 electronic, up to 50% front torque)

Vehicle Performance:

• 0–60 mph in ~4.6–4.8 seconds; quarter‑mile in roughly 13.2 s at ~104 mph

• Top speed electronically limited around 152 mph (~245 km/h) Fuel economy modest: ~14–17 mpg combined, city/highway ~12–15 mpg (range ~250–300 mi per fill) depending on year/model

 Reliability, Maintenance & Community Feedback

Common Assets & Weak Points:

• Built robust: forged internals, oil squirters, thicker cooling channels—designed to manage high rpm and heat.

• Still, being a performance V8 with aggressive usage, symptoms of wear appear around 120,000–150,000 miles in many cases—transmission valve body issues, spark plug and head problems, coolant or exhaust components wear.

• Reddit users cite maintenance bells like replacing transmission control module (~$1,400), 16 spark plugs (2 per cylinder), frequent fluid changes, and occasional head rebuilds after heavy track or drag use

Community Verdict:

From Reddit enthusiasts:

Many advise to avoid high‑mile SRT models unless well‑maintained with documented service.

Used Engine Market: Pricing & Availability

If you’re looking to buy a JEEP CHEROKEE SRT8 6.1L ENGINE  longblock from a donor Jeep, here’s what the market showed as of early 2023:

• RacingCarNetwork listing: 2008 OEM longblock for ~US $3,043 Another listing: engine plus transmission swap package ~US $5,000 at ~86,000 miles

• eBay offers engine blocks alone (used) around $4,299.99 (plus shipping) such as a 6.1 L motor block from an SRT8 model .

• Similar listings for Charger/Challenger 6.1 HEMI engines (compatible) go for US $4,700 used

These prices vary by mileage, condition, shipping, and whether additional parts like harness, PCM, or transmission are included. As of 2025, values may have risen due to collector demand.

Installation costs:

• Swapping a 6.1L into a non‑SRT vehicle (e.g. V6 base model) involves sourcing harness, PCM, transmission, transfer case, axles, exhaust, tuning. Labor quotes often range US $17,000+ for a direct replacement and even more for a full swap into a different donor vehicle

• Reddit DIY builders estimate $18k–20k total for full engine swap projects, purchasing a donor car, disassembly, and reassembly

Conclusion: If you simply need an engine longblock replacement, ~US $3k–5k plus labor is typical. Full V8 swap packages or installations escalate costs quickly.

 Buying Advice: What to Look For JEEP CHEROKEE SRT8 6.1L ENGINE

If you’re sourcing a 6.1L SRT8 engine, consider these key tips:

1. Known mileage and service history: lower wear if under ~100k mi with records.

2. Run condition: ideally tested longblock from running vehicle—avoid seized or cracked cases.

3. Include or verify accessories: oil pan, pulleys, wiring harness, sensors can add significant cost if missing.

4. Shipping logistics from US to international buyers: shipping and import duties add hundreds or more.

5. Compatibility: the engine is interchangeable between SRT8 Jeep, Charger SRT8, 300C SRT8, Challenger SRT8 (2005–2010 era) with same code ESF

6. Labour cost: factor in engine mounts, wiring, exhaust headers, PCM adaptation, fluid lines, and tuning installation.

 Why Choose the JEEP CHEROKEE SRT8 6.1L ENGINE?

Strengths:

• Authentic Hemi pedigree, raw sound, historical appeal as Jeep’s first high‑output SUV engine.

• Easy to work on thanks to OHV layout, simple intake/exhaust plumbing, widely supported by aftermarket.

• Proven upgrade base: bolt‑on performance parts (tuning, headers, cams) yield easy 20–30% gain

• Uniqueness: With limited production (~14,921 units total)  the Grand Cherokee SRT8 remains collectible.

Drawbacks:

• Fuel consumption: city MPG can dip into 11–12 mpg (~20 L/100 km).

• Modern alternatives: The later 6.4 L HEMI (392) produces closer to 470 hp with similar usability but higher fuel economy and advanced PCM features.

• Complex swaps: Installing into other vehicles adds major cost and parts compatibility hurdles.

 Market Comparisons JEEP CHEROKEE SRT8 6.1L ENGINE

Versus the 6.4 L HEMI (WK2 SRT):

• Gains ~50 hp and 45 lb·ft while improving fuel efficiency and offering eight‑speed transmission and more modern electronics The 6.1 retains more classic simplicity (5‑speed, no fuel‑saver tech) for purists.

Versus OEM 5.7 L HEMI V8:

• The 6.1’s forged internals, higher power, and higher compression make it stronger, though 5.7 is more common and easier to find parts.

Example Listing Scenarios

• Longblock only (~US $3,000): Good for rebuild or core replacement if you already have harness, sensors, PCM, etc.

• Engine + transmission package (~US $5,000 with 86K miles): Often includes some wiring and drivetrain components—faster turnaround installation.

• Engine block alone on eBay (~US $4,300): Suitable if doing full engine rebuild from bottom up .

Indicative pricing summary:

Installation adds significant labor—engine drop kit, wiring harness, new computer programming, etc.

 Final Thoughts & Recommendations

• If you’re restoring or repairing a Grand Cherokee SRT8 from 2006–2010, sourcing a tested 6.1 L HEMI longblock in good condition is a cost‑effective and period‑correct solution—expect $3k–6k just for parts.

• For custom swaps into non‑SRT vehicles, consider the full cost of donor vehicle, drivetrain, wiring, installation, potentially rivaling or surpassing the cost of buying a complete SRT8.

• Always verify mileage, condition, and if longblock is running. Ask for photos of teardown, compression readings, etc.

• Factor in shipping, import duties, and installation costs in your region.

• For improved durability, consider upgraded cooling, lightweight pulleys, aftermarket tuning, and exhaust headers.

 Conclusion

The 6.1 L HEMI V8 in the JEEP CHEROKEE SRT8 6.1L ENGINE  is a standout engine renowned for its raw performance, classic sound, and brute‑force appeal. With 420 horsepower, healthily‑engineered internals, and strong enthusiast support, it remains a sought‑after swap candidate or replacement for dead SRT motors.

Used longblocks typically range from USD 3,000–5,000, while full swap kits or donor packages can double or triple that cost. Buyers should be cautious about mileage, condition, included components, and installation complexity.

For collectors, performance fans, or someone restoring an SRT8, the 6.1 engine is a worthy centerpiece—just make sure you know the full total cost, availability of parts, and service history before you commit.