FORD LC3E6K301JC Engine Crankshaft Rear Seal Cover 7.3L

( Manufacturer Part Number: LC3E6K301JC ), ( Part Type: Seal Cover Engine Crankshaft ), ( Oe/oem Part Number: Lc3z6335c / Lc3z6335 / Lc3z-6335-c, Lc3z6335a / Lc3z6335 / Lc3z-6335-a ), ( Items Included: Undefined ), ( Vintage Part: No ), ( Finish: Unfinished )

Review FORD 7.3l Engine Crankshaft Rear Main Seal Cover Oem fits F-350 F-250 2023–2025

The **Ford LC3E6K301JC 2023 2025 F-350/F-250 7.3L Power Stroke Engine Crankshaft Rear Seal Cover** is a precision-engineered, high-performance component designed exclusively for Ford s legendary **7.3L V8 Power Stroke diesel engines**, found in the **2023 through 2025 model-year F-350 Super Duty and F-250 Super Duty trucks**. This aftermarket replacement part is meticulously crafted to match or exceed OEM specifications, ensuring a seamless fit and optimal functionality for the engine s critical rear main seal area. The seal cover serves as a protective barrier, housing the crankshaft rear main seal and preventing contamination from debris, oil leaks, or external elements that could compromise engine longevity and performance. Constructed from **high-grade, heat-resistant materials**, this seal cover is engineered to withstand the extreme pressures and temperatures generated by the **7.3L turbocharged diesel**, which produces up to **430 horsepower and 860 lb-ft of torque** in its most powerful configurations. Its **precision-machined surfaces** and **tight tolerances** guarantee a secure seal, reducing the risk of oil leaks that could lead to costly internal engine damage. Whether used in **heavy-duty towing applications, off-road adventures, or daily driving**, this replacement part is built to deliver **reliability, durability, and peace of mind**, allowing truck owners to maintain their Power Stroke s legendary durability without compromising on performance. Ideal for **DIY mechanics or professional shops**, this seal cover is a straightforward yet essential upgrade for those seeking to restore or enhance the integrity of their engine s rear main assembly.

### **Pros and Cons of Buying a Ford F-350/F-250 (2023-2025) with a 7.3L Engine and Crankshaft Rear Seal Cover (LC3E6K301JC)**

#### **Overview**

The **Ford F-350/F-250 Super Duty with the 7.3L Power Stroke diesel engine** (LC3E6K301JC) is a robust, heavy-duty truck designed for towing, hauling, and off-road use. The **crankshaft rear seal cover** is a critical component that helps prevent oil leaks and maintains engine longevity. Below is a detailed breakdown of the advantages and disadvantages of purchasing one of these trucks, along with a final recommendation.

---

### **Pros**

1. **Exceptional Towing and Hauling Capacity**

- The **7.3L Power Stroke** is one of the most powerful diesel engines in Ford s lineup, capable of towing **up to 22,500 lbs (F-350 Super Duty)** and hauling heavy loads with ease.

- The **high torque output (375 lb-ft in 2023-2025 models)** makes it ideal for construction, farming, and commercial use.

2. **Durability and Reliability**

- The **7.3L engine** is known for its **long lifespan**, often exceeding **500,000 miles** with proper maintenance.

- Built with **cast-iron blocks and forged components**, it is designed for **heavy-duty, high-stress applications**.

- The **crankshaft rear seal cover** is part of the engine s **oil containment system**, reducing the risk of catastrophic oil leaks if properly maintained.

3. **Strong Resale Value**

- Ford s **Super Duty lineup holds its value well**, especially the **7.3L Power Stroke**, which remains in demand for its power and durability.

- The **limited production of newer models** (especially with advanced features) can also contribute to higher resale prices.

4. **Advanced Technology and Features**

- **2023-2025 models** come with **Ford s PRO Power Onboard (PPO) 3.5 kW generator**, allowing for **extended road trips without needing to stop for charging**.

- **Adaptive Cruise Control, Blind Spot Monitoring, and Pre-Collision Assist** improve safety.

- **Available **Max Trailer Backup Assist** helps with precise towing maneuvers.

- **12-inch touchscreen with SYNC 4A** provides modern connectivity.

5. **Off-Road Capability**

- The **F-350/F-250 Super Duty** is available with **Ford s Off-Road Package**, including **skid plates, all-terrain tires, and a locking rear differential**.

- The **7.3L engine s torque** makes it well-suited for **rock crawling, mudding, and heavy-duty trail work**.

6. **Fuel Efficiency (Compared to Gas Engines)**

- While not as efficient as modern turbo-diesels (like the **6.7L Power Stroke**), the **7.3L still offers better MPG in highway driving** ( 12-15 MPG combined) compared to gas V8s.

- **Diesel fuel is cheaper per gallon** than gasoline, reducing long-term operating costs.

7. **Customization and Upgrade Options**

- The **F-350/F-250 platform** supports **aftermarket modifications**, including **exhaust upgrades, lift kits, and performance tuning**.

- **Heavy-duty suspension and axle options** allow for **customized towing setups**.

8. **Low-Range (L/R) and Crawl Control**

- The **7.3L engine s torque converter and transmission** work well with **low-range gearing**, making it excellent for **steep inclines and rough terrain**.

9. **Warranty Coverage**

- Ford offers a **limited powertrain warranty (5 years/100,000 miles)** and a **basic vehicle warranty (3 years/36,000 miles)**, which provides peace of mind for new buyers.

10. **Strong Brand Reputation**

- Ford s **Super Duty trucks** are widely regarded as **industry leaders in durability and performance**, with a **large dealer network** for support.

---

### **Cons**

1. **High Upfront Cost**

- The **F-350/F-250 Super Duty with a 7.3L engine** is **one of the most expensive Ford trucks**, with **MSRP starting around $50,000 ** (depending on trim and options).

- **Used models** (2023-2025) may still be **premium-priced** due to high demand.

2. **Higher Maintenance and Repair Costs**

- **Fuel system cleaning** (every 50,000-100,000 miles)

- **Turbocharger and EGR system maintenance**

- **Oil changes with **diesel-specific filters** (more expensive than conventional oil)

- **Labor costs** for repairs can be higher due to the **complexity of the engine**.

3. **Potential for Oil Leaks (Crankshaft Rear Seal Cover Issues)**

- The **crankshaft rear seal cover** is a **common failure point** in older 7.3L engines, though **2023-2025 models have improvements**.

- **Oil leaks around the rear main seal**

- **Whining or grinding noises** from the engine

- **Blue smoke from the exhaust** (indicating oil burning)

- **Replacement is costly** ( $1,500-$2,500 labor parts), and **preventative maintenance** (like regular oil changes) is crucial.

4. **Noise and Vibration**

- The **7.3L Power Stroke is loud**, especially at **low RPMs**, which can be **annoying in urban driving**.

- **Vibration can be noticeable** at highway speeds, though **modern suspension tuning has improved this**.

5. **Lower Fuel Efficiency Than Modern Diesels**

- While better than gas engines, the **7.3L is less efficient** than newer **turbocharged diesel engines** (e.g., **6.7L Power Stroke**).

- **MPG is lower in stop-and-go traffic**, making it less ideal for **city driving**.

6. **Limited Availability of Parts and Dealers**

- Some **aftermarket parts** may be **harder to find** compared to more common engines.

- **Specialized diesel mechanics** are needed for **major repairs**, which can be **time-consuming and expensive**.

7. **Emissions and Smog Check Issues**

- Older diesel trucks (pre-2017) had **more emissions problems**, but **2023-2025 models comply with stricter regulations**.

- **DPF (Diesel Particulate Filter) clogging** can still occur if **not driven enough for regeneration**, leading to **reduced performance**.

8. **Weight and Handling**

- The **F-350/F-250 is heavy**, which can affect **fuel efficiency and maneuverability** in tight spaces.

- **Steering and braking** require more effort due to the **increased weight**.

9. **Resale Depreciation (Compared to Gas Engines)**

- While **diesel trucks hold value well**, they **depreciate faster than gas V8s** in some markets due to **higher upfront costs**.

- **Used diesel trucks may have lower demand** if buyers prefer **cleaner, more efficient modern diesels**.

10. **Potential for Electronic Issues**

- Like all modern trucks, **Ford s Super Duty relies heavily on electronics**, which can **fail over time**.

- **ECU (Engine Control Module) issues** or **sensor failures** may require **expensive diagnostics**.

---

### **Final Conclusion and Recommendation**

#### **Who Should Buy a 2023-2025 Ford F-350/F-250 with a 7.3L Engine?**

- **Heavy-duty towing and hauling** (construction, farming, commercial use).

- **Off-road enthusiasts** who need **raw torque and durability**.

- **Buyers who prioritize **long-term reliability** over fuel efficiency.

- **Those who can afford **higher maintenance costs** and want a **premium workhorse**.

- **People who need **extended warranty coverage** and **Ford s dealer support network**.

#### **Who Should Avoid It?**

- **Budget-conscious buyers** (high purchase price and maintenance costs).

- **Daily commuters** (noise, vibration, and lower MPG in city driving).

- **Those who prefer **modern turbo-diesels** (like the **6.7L Power Stroke**) for better fuel economy.

- **Buyers who dislike **heavy trucks** and want **better handling**.

- **People who cannot afford **potential oil leak repairs** (

Details:

Donor vehicle: 2024 FORD F-350 SUPER DUTY LARIAT CREW CAB STANDARD BED 7.3L V8 4WD AUTOMATIC TRANSMISSION. This item has been previously used. Shipping FREE SHIPPING available for most items within lower 48 states. Color: BLACK UM-AGATE METALLIC EXTERIOR / 6B-BLACK ONYX INTERIOR.

Mileage: 31K MILES. Please verify it fits and is compatible with your specific model before purchasing.

part #: lc3e6k301jc prices

• $46.75-$89.99

specifications cranshafengin:

• for models: F-350, F-250
• for makes: Ford
• for years: 2023-2025
• mpn: Lc3e6k301jc
• part type: Seal Cover Engine Crankshaft
• oe/oem part number: Lc3z6335c / Lc3z6335 / Lc3z-6335-c, Lc3z6335a / Lc3z6335 / Lc3z-6335-a
• items included: Undefined
• vintage part: No
• finish: Unfinished

returns cranshafengin:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

shipping cranshafengin:

• cost: $0.00
• class: Standard
• transit: 3-7 Days
• service: Standard
• type: Fixed

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

seller cranshafengin:

• city: Traverse City, Michigan
• rating: 99.9%
• # reviews: 91978

payments cranshafengin:

• wallet: Google-pay
• credit card: Diners-club
• other

offer cranshafengin:

• availability: In Stock
• options: Ship-to-home
• started: May 4, 2026
• quantity: 1
• sold: 0
• best offers: True

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