CHRYSLER 5143397AA Left Cylinder Head 306-00120 5.7L

( Manufacturer Part Number: 5143397AA ), ( Model: ASPEN ), ( Interchange: 306-120 ), ( Type: Cylinder Head Assembly ), ( Ipn: 306-00120 ), ( Manufacturer Warranty: 1 Month ), ( Id: 4595d2b1-ac28-4453-a28c-da6e240e9770 )

Review CHRYSLER 5.7l Drivers Left Cylinder Head fits ASPEN RAM 1500 2500 3500 2006–2008

The **Chrysler 5143397AA 2007-2008 Aspen, 2006-2008 Ram 1500/2500/3500 5.7L Left Cylinder Head** is a high-performance, factory-direct replacement part designed to restore optimal engine function and reliability in select Chrysler vehicles equipped with the iconic **5.7L Magnum V8** engine. This precision-engineered cylinder head, manufactured to meet or exceed OEM specifications, ensures seamless integration with the left bank of the V8, delivering the same robust power and durability as the original component. Crafted from high-quality cast iron, this head is built to withstand the intense heat and pressure generated during high-performance driving, making it an ideal choice for both daily drivers and enthusiasts seeking to maintain peak engine efficiency. The **5143397AA** part number confirms its compatibility with the **2007-2008 Chrysler Aspen** as well as the **2006-2008 Ram 1500, 2500, and 3500** models, ensuring a perfect fit for these popular trucks and SUVs. Whether replacing a worn or damaged head due to overheating, coolant leaks, or general wear, this aftermarket part is engineered to restore proper combustion chamber integrity, valve train alignment, and cooling efficiency. Its compatibility with the **5.7L Magnum s** fuel-injected system and electronic engine controls ensures that once installed, it will function flawlessly with the vehicle s existing components, including the intake manifold, exhaust ports, and valve cover. For those looking to enhance their vehicle s performance or address engine issues, this cylinder head is a dependable, cost-effective solution that upholds Chrysler s legacy of rugged, high-output power.

### **Pros and Cons of Buying a 2007 2008 Chrysler Aspen (06 08 Ram 1500/2500/3500) with a 5.7L Engine and a Left Cylinder Head Issue**

#### **Pros**

1. **Proven 5.7L Magnum Engine**

- The 5.7L V8 (Magnum) is a robust, high-torque engine known for durability, especially in heavy-duty applications like the Ram 1500/2500/3500. It handles towing and hauling well when properly maintained.

- Common in full-size trucks, parts and labor are widely available, making repairs more accessible.

2. **Reliable Transmission Options**

- The 2007 2008 models came with either a **4-speed automatic (41TE)** or **5-speed automatic (545RFE)**, both of which are generally reliable if maintained.

- The 41TE is simpler and less prone to failure than some modern transmissions, while the 545RFE offers better fuel economy and smoother shifts.

3. **Strong Frame and Suspension**

- The Aspen/Ram trucks feature a **unibody construction with a boxed frame**, which provides better ride comfort and handling than traditional body-on-frame trucks.

- The suspension is designed for a balance of comfort and capability, making it suitable for daily driving and light towing.

4. **Availability of Parts and Aftermarket Support**

- As a Chrysler product, these trucks benefit from a large aftermarket presence, including performance upgrades (e.g., exhaust, intake, suspension) and diagnostic tools.

- The 5.7L engine has been around long enough that common issues (like the cylinder head problem) have well-documented fixes.

5. **Potential for Customization**

- The Aspen/Ram platform allows for modifications like **lift kits, aftermarket exhaust, performance chips, and suspension upgrades**, making it a good candidate for enthusiasts.

6. **Lower Purchase Price Compared to Modern Trucks**

- These models are significantly cheaper than newer trucks, offering better value for the money if the right issues are addressed.

---

#### **Cons**

1. **Cylinder Head Issue (Left Side)**

- The **most critical concern** is the **left cylinder head** on the 5.7L Magnum, which is prone to **warping, cracking, or leaking coolant** due to poor cooling and stress from the engine s design.

- Symptoms include **overheating, white smoke from the exhaust, coolant leaks, or a misfire** (especially on cylinders 1, 2, or 3).

- **Repair cost:** Replacing a warped cylinder head can range from **$1,500 $3,000 **, depending on labor rates and whether new heads or just gaskets/bolts are needed.

2. **Electrical and Computer Reliability**

- Chrysler s **MDS (Modular Diagnostic System)** and **PCM (Powertrain Control Module)** have had issues in the past, leading to **check engine lights, transmission shifts, or starter problems**.

- Some owners report **intermittent electrical gremlins**, which can be frustrating to diagnose.

3. **Fuel Economy**

- The 5.7L V8 is **not fuel-efficient** by modern standards, averaging **12 15 MPG combined** in a 1500, and even worse in the 2500/3500.

- If fuel costs are a concern, this truck will be expensive to operate.

4. **Transmission Wear (Especially 545RFE)**

- The **545RFE transmission** can develop **slipping, rough shifts, or solenoid failures** over time, requiring a rebuild or replacement ( $2,500 $4,000).

- The **41TE** is more durable but still not immune to failure, particularly if fluid changes were neglected.

5. **Rust and Body Corrosion**

- Many older Chryslers suffer from **rust in wheel wells, rocker panels, and undercarriage**, especially in snowy or salted regions.

- A thorough inspection of the **frame rails, subframe, and body seams** is essential before purchase.

6. **Resale Value and Depreciation**

- These trucks **lose value quickly** due to their age and reputation for reliability issues.

- If you plan to sell later, you may not recoup much of the investment.

7. **Maintenance Costs Over Time**

- While parts are cheap, **labor costs add up**, especially for engine work, transmission repairs, and electrical issues.

- **Regular maintenance (oil changes, cooling system flushes, timing belt inspection)** is critical to avoid major failures.

---

### **Ending Conclusion**

- The **left cylinder head is inspected and either replaced or confirmed structurally sound** (this is the #1 priority).

- The **transmission is in good condition** (check for leaks, smooth shifts, and no warning lights).

- The **cooling system is up to date** (radiator, hoses, thermostat, and water pump should be replaced if worn).

- The **owner has maintained it properly** (oil changes, fuel system cleaning, suspension checks).

- You **don t mind lower fuel economy** and are okay with occasional repairs.

- The **cylinder head has been ignored** and is already warped or leaking.

- The **transmission shows signs of wear** (slipping, delayed engagement).

- The **electrical system is unreliable** (frequent check engine lights, starter issues).

- The **rust is severe** and would require extensive repairs.

---

### **Recommendation**

- **Get a pre-purchase inspection (PPI) from a trusted mechanic** focus on the **cylinder head, cooling system, transmission, and electrical components**.

- **Demand documentation** of past cylinder head replacements or cooling system work.

- **Test drive and monitor for overheating** if it runs hot, walk away unless the issue is fixed.

- **Budget for potential repairs**, especially if the cylinder head needs work.

- **Prioritize the cylinder head fix** this is the most expensive and critical repair.

- **Consider a used 5.7L from a different year** (e.g., 2005 2006) if you find one with a **proven cylinder head history**.

- **Avoid the 545RFE transmission** if possible stick with the **41TE** if you can find one in good shape.

- **A newer used truck (2010 Ford F-150, Chevy Silverado, or Ram 1500 with the 5.7L or 6.4L)** may offer better long-term reliability with fewer known issues.

- If you **love the Aspen s design and want a project**, go for it but **expect repairs and be prepared for them**.

This truck can be a **great value if the cylinder head is in good shape and the rest of the major systems are sound**. However, **it is not a "set-and-forget" purchase** it requires **attention to maintenance and potential repairs**. If you re willing to **put in the work or have the budget for fixes**, it can be a rewarding buy. If you want **low maintenance and reliability**, consider a newer or differently sourced truck.

Details:

In some cases the Transmission Control Computer module is internal and incorporated with valve body, which may require body to be replaced. Quick shipping. DODGE RAM PICKUP 1500 SERIES 06-08 5.7L, LH. Some external sensors or solenoids may need to be replaced.

Buyer pays return shipping if wrong color ordered. Warranty period begins the day after delivery. DODGE RAM PICKUP 2500 SERIES 06-08 5.7L, LH.

Most items are shipped the same-day as purchase. Axle seals, front and drive shaft seals will also need to be replaced. Search for more parts ASPEN. Transmission lines will need flushed, along with the transmission oil cooler needs replaced if equipped, this to be done so contaminants from bad not ruin your replacement.

Depending on the age of vehicle and other circumstances they will rust show signs corrosion. Buyer will need to replace the transmission oil filter, put a new pan gasket on, flush and add manufacturer specific fluids. Engines must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Cylinder Head.

Transfer cases will not be included with transmissions from 4x4 or All Wheel Drive vehicles. Picture in the listing may not be of actual item sold; it a stock picture only. Transmissions must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Free shipping, if offered, applies only to commercial addresses with proper equipment dock and forklift unload.

part #: 5143397aa prices

• $229.95-$949.00

specifications cylinderheapar:

• for models: 1500, 2500, 3500, Aspen, Ram
• for makes: Chrysler
• for years: 2006-2008
• mpn: 5143397aa
• model: Aspen
• interchange: 306-120
• type: Cylinder Head Assembly
• ipn: 306-00120
• manufacturer warranty: 1 Month
• id: 4595d2b1-ac28-4453-a28c-da6e240e9770

payments cylinderheapar:

• other
• wallet: Paypal
• credit card: Visa

returns cylinderheapar:

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

seller cylinderheapar:

• rating: 99.5%
• city: Erie, Pennsylvania
• # reviews: 23206

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

offer cylinderheapar:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• quantity: 1
• started: March 2, 2026
• sold: 0

shipping cylinderheapar:

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

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