CHEVROLET 12624549 Pzev Cylinder Head Emissions 306-192 2.4L

( Brand: Chevrolet ), ( Manufacturer Part Number: 12624549 ), ( Material: Aluminum ), ( Interchange: 306-192 ), ( Type: Cylinder Head Assembly ), ( Manufacturer Warranty: 1 Month ), ( Id: D5b5aa7e-b34b-47f3-8715-a30a69c16a1b ), ( Country Of Origin: United States )

Review CHEVROLET Chevy Pontiac 2.4l Pzev Cylinder Head California Emissions fits MALIBU G6 2009–2012

The **Chevrolet 12624549 2009-2012 Chevrolet Malibu and 2009-2010 Pontiac G6 2.4L PCV (Positive Crankcase Ventilation) Cylinder Head** is a precision-engineered emissions control component designed to meet stringent environmental regulations while ensuring optimal performance for these popular mid-size sedans. This high-quality cylinder head assembly integrates a **2.4L Ecotec inline-four engine** architecture, featuring a robust **cast aluminum construction** with integrated **intake and exhaust ports** optimized for airflow efficiency. The head is equipped with **four-valve-per-cylinder technology**, allowing for improved combustion and power delivery while maintaining smooth operation. A key feature of this component is its **PCV system integration**, which helps manage crankcase emissions by routing blow-by gases back into the intake manifold, reducing harmful hydrocarbon leaks and improving engine longevity. The cylinder head also incorporates **modern valve train components**, including **hydraulic lifters** and **pushrods**, ensuring reliable valve operation with minimal wear. Additionally, it is engineered to support **OBD-II compliance**, featuring diagnostic connectors and sensors that monitor emissions performance, helping to maintain compliance with federal and state emissions standards. Whether used in a **restored classic Malibu or a meticulously rebuilt G6**, this cylinder head delivers a balance of durability, efficiency, and emissions control, making it an essential upgrade for enthusiasts and mechanics seeking a high-performance yet compliant solution.

### **Pros and Cons of Buying a 2009-2012 Chevrolet Malibu (GM 12624549) or 2009-2010 Pontiac G6 with a 2.4L PZE (Port Fuel Injection, 4-Cylinder) Engine and Emissions-Related Head Issues**

#### **Pros**

1. **Commonality and Availability of Parts**

- The 2.4L PZE engine is widely used in multiple GM vehicles (Malibu, G6, Cobalt, Sonic, etc.), meaning parts are readily available and often affordable. This reduces long-term repair costs compared to rare or discontinued engines.

- Aftermarket support is strong, with tuners, sensors, and performance upgrades (e.g., cold air intakes, exhaust systems) widely available.

2. **Fuel Efficiency**

- The 2.4L PZE engine is relatively efficient for its class, offering around **20-22 MPG city and 28-32 MPG highway** in the Malibu/G6, which is decent for a front-wheel-drive sedan. This can save money on gas compared to larger V6 engines.

- The engine is not overly thirsty, making it a practical choice for daily driving.

3. **Reliability of the Engine Itself**

- The 2.4L PZE engine is known for being **durable if maintained properly**. Many examples last **200,000 miles** with basic upkeep (oil changes, timing belt/replacement if required, and minor tune-ups).

- The **4-cylinder layout** means fewer potential failure points than a V6 or V8, reducing long-term mechanical risks.

4. **Affordability of the Vehicle**

- Both the Malibu and G6 are **budget-friendly** used cars, especially in this model range. Prices typically range from **$3,000 to $8,000** depending on mileage and condition, making them accessible for buyers on a tight budget.

- Lower purchase price means more equity for modifications or repairs if needed.

5. **Potential for Modifications**

- **Cold air intake** (can improve throttle response and MPG slightly).

- **Exhaust system upgrades** (better flow, louder sound).

- **Tune/ECU flash** (can unlock hidden horsepower, often **50-100 HP** with aftermarket tunes like **HP Tuners, SCT, or Haltech**).

- **Turbocharging** (less common but possible with a **turbo kit**, though requires careful tuning to avoid emissions or drivetrain issues).

- The **front-wheel-drive layout** makes it easier to modify for track use or street performance compared to rear-wheel-drive cars.

6. **Emissions Compliance (If Addressed)**

- The **2009-2012 Malibu and 2009-2010 G6** were built to meet **California Air Resources Board (CARB) emissions standards**, which means they have **OBD-II diagnostics, EVAP systems, and catalytic converters**. While these add complexity, they are **not inherently more unreliable** than non-emissions vehicles.

- Many emissions-related issues (e.g., **faulty oxygen sensors, EVAP leaks, or failing catalytic converters**) are **repairable** and not necessarily dealbreakers if the buyer is prepared for maintenance.

7. **Decent Driving Experience**

- The Malibu and G6 offer a **comfortable ride** with decent handling for their class. The **2.4L engine provides smooth power delivery**, though it lacks the punch of a V6.

- The **Malibu has a slightly more refined interior** than the G6, which was discontinued after 2010 and had a less premium feel.

---

#### **Cons**

1. **Emissions-Related Head and Engine Issues (PZE-Specific Problems)**

- The **2.4L PZE engine (especially in 2009-2012 Malibu and 2009-2010 G6)** has a **known history of head gasket failures, warped cylinder heads, and coolant leaks** due to:

- **Poor cooling system design** (some models had **insufficient coolant capacity** or **leaky thermostat housings**).

- **Head gasket failures** (common in high-mileage examples, often due to **overheating or coolant contamination**).

- **Warped cylinder heads** (can cause **misalignment, coolant leaks, and compression loss**, leading to **rough idle, overheating, or white smoke from the exhaust**).

- **Milky oil or coolant in the oil cap** (indicates a **head gasket leak**).

- **Overheating** (even with a new thermostat or radiator).

- **Coolant loss without visible leaks** (could mean a **blown head gasket**).

- **Rough idle, knocking, or loss of power** (signs of **warped heads or failing valves**).

- **Repair costs can be high** ($1,500 $3,000 for a **head replacement, new gaskets, and machine work**), especially if the **engine block is also warped** (requiring resurfacing).

2. **Transmission Problems (Especially in Early Models)**

- The **4T65E automatic transmission** (used in these vehicles) is **known for failing prematurely**, especially in **high-mileage examples**.

- **Delayed engagement or rough shifting**.

- **Slipping gears** (especially in 1st and 2nd gear).

- **Whining or grinding noises** (indicates **internal wear**).

- **Transmission fluid leaks** (common due to **weak seals**).

- **Repair costs** can range from **$1,500 $3,500** for a **rebuild or replacement**, depending on the severity.

3. **Electrical and Sensor Issues**

- **Random check engine lights** (often due to **faulty oxygen sensors, MAF sensors, or EVAP leaks**).

- **Intermittent electrical gremlins** (e.g., **failing window regulators, door locks, or infotainment issues**).

- **Diagnosing and fixing these issues** can be **time-consuming and costly** if the buyer lacks mechanical/electrical knowledge.

4. **Rust and Body Issues (Especially in Snow-Belt Regions)**

- **Rocker panels** (common in front-wheel-drive GM cars).

- **Wheel wells and lower control arms**.

- **Hatchback/G6 tailgates** (if applicable).

- **Rust repairs** can be **expensive** if structural components are compromised.

5. **Discontinued Parts and Dealer Support**

- Since the **G6 was discontinued in 2010** and the **Malibu was redesigned in 2013**, **new parts and dealer support are limited**.

- **Aftermarket parts** are available, but **factory OEM parts may be harder to find** for rare components.

6. **Resale Value and Depreciation**

- Both the **Malibu and G6** have **poor resale value** due to their age and lack of modern features.

- If you plan to **keep the car long-term**, depreciation will eat into your investment.

7. **Potential for Emissions Failures (Smog Check Issues)**

- In **California and some other states**, a car with **emissions-related issues** may **fail a smog check**, making it **illegal to register** in those areas.

- **Fixing emissions issues** (e.g., **replacing O2 sensors, catalytic converters, or EVAP components**) can be **costly and time-consuming**.

---

### **Conclusion**

- You **budget for potential emissions/cooling system repairs** (head gaskets, warped heads, coolant leaks).

- You **plan to perform regular maintenance** (oil changes, transmission fluid flushes, sensor checks).

- You **enjoy modifying the car** and are okay with **intermittent electrical or emissions issues**.

- You **don t mind lower resale value** and are buying for **short-term use or a project car**.

- You **can t afford major repairs** (transmission, head gasket, or cylinder head replacement).

- You **live in a state with strict emissions laws** (e.g., California), where fixing smog issues may be difficult.

- You **expect a trouble-free, low-maintenance vehicle** this engine/transmission combo has **known weaknesses** that require attention.

---

### **Recommendation**

1. **If You re

Details:

Axle seals, front and drive shaft seals will also need to be replaced. Free shipping, if offered, applies only to commercial addresses with proper equipment dock and forklift unload. Quick shipping. Most items are shipped the same-day as purchase.

Warranty period begins the day after delivery. Transmissions must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Transfer cases will not be included with transmissions from 4x4 or All Wheel Drive vehicles. Buyer will need to replace the transmission oil filter, put a new pan gasket on, flush and add manufacturer specific fluids.

Picture in the listing may not be of actual item sold; it a stock picture only. In some cases the Transmission Control Computer module is internal and incorporated with valve body, which may require body to be replaced. Buyer pays return shipping if wrong color ordered. Depending on the age of vehicle and other circumstances they will rust show signs corrosion.

Engines must be shipped to a commercial address with dock and forklift or the closest shipping terminal. 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. Some external sensors or solenoids may need to be replaced.

part #: 12624549 prices

• $779.99-$810.41

specifications cylinderheapar:

• for models: G6, Malibu
• for makes: Chevy, Pontiac, Chevrolet
• for years: 2009-2012
• brand: Chevrolet
• mpn: 12624549
• material: Aluminum
• interchange: 306-192
• type: Cylinder Head Assembly
• manufacturer warranty: 1 Month
• id: D5b5aa7e-b34b-47f3-8715-a30a69c16a1b
• country of origin: United States

payments cylinderheapar:

• credit card: Visa
• wallet: Apple-pay
• other

offer cylinderheapar:

• started: May 5, 2026
• availability: In Stock
• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 1

returns cylinderheapar:

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

seller cylinderheapar:

• city: Erie, Pennsylvania
• # reviews: 26368
• rating: 99.7%

general cylinderheapar:

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

shipping cylinderheapar:

• carrier: USPS
• cost: $0.00
• service: USPS Ground Advantage
• class: Standard
• type: Fixed
• transit: 3-7 Days

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