MERCEDES 113-078-00-49 Valve Benz

( Manufacturer Part Number: 113-078-00-49 ), ( Part Type: Valve ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 113078004964 )

Review MERCEDES benz Genuine Exchange Valve

The **Mercedes-Benz 113-078-00-49** is a high-performance, precision-engineered intake valve designed specifically for the iconic **M117/M119** inline-six engine family, which powers a range of luxury Mercedes-Benz vehicles, including the **E-Class (W212/W213), S-Class (W222), and GL-Class (X164)**. This valve is a critical component of the engine s **direct-injection fuel system**, ensuring optimal airflow and combustion efficiency while maintaining the strict tolerances demanded by Mercedes-Benz s engineering standards. Crafted from **high-grade 1.25% chromium-silicon steel**, the valve is heat-treated to achieve an ideal balance of strength, durability, and resistance to thermal fatigue, making it capable of withstanding the extreme pressures and temperatures generated during high-performance driving or extended use in demanding conditions. The **conical valve seat** is precision-machined to ensure a perfect seal with the intake port, minimizing blow-by and maximizing engine efficiency, while the **stem** is polished to an ultra-smooth finish to reduce friction within the valve guide, thereby extending the lifespan of both the valve and the surrounding components. This part is a direct replacement for the original equipment manufacturer (OEM) valve, maintaining the same **dimensions, material specifications, and performance characteristics** as the factory component, ensuring seamless integration into the engine bay without the need for additional modifications. Whether used in a **restoration project, routine maintenance, or high-mileage vehicle upgrade**, the **113-078-00-49** valve delivers the reliability and performance expected from Mercedes-Benz, helping to preserve the engine s power output, fuel economy, and overall longevity.

### **Pros and Cons of Buying a Mercedes-Benz 113-078-00 Valve (Intake Manifold Gasket)**

The **Mercedes-Benz 113-078-00** is a common intake manifold gasket used in several M136 and M139 engine variants (e.g., M276 E350, M276 E350 CDI, M276 E350 AMG). Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

---

### **Pros**

1. **Widely Available and Affordable**

- This gasket is a standard OEM part and is readily available from Mercedes-Benz dealerships, aftermarket suppliers, and online retailers. Prices typically range between **$50 $150**, making it a cost-effective solution compared to some high-performance alternatives.

- It is a **direct replacement** for the original equipment, ensuring compatibility with most M136/M139 engines without modifications.

2. **Proven Reliability (When Installed Correctly)**

- As an OEM part, it is designed to meet Mercedes-Benz s engineering standards, reducing the risk of immediate failure if installed properly (with the correct torque specs and sealing methods).

- Many owners report **no issues** for **50,000 100,000 miles** if the installation is clean and the engine bay is kept clean (preventing oil or coolant contamination).

3. **Easy to Install (For Skilled DIYers)**

- Replacing the gasket is a **moderate-level** DIY job that requires basic mechanical skills, a torque wrench, and clean tools. Most owners complete the job in **2 4 hours** with proper preparation.

- No major engine disassembly is needed only removal of the intake manifold, cleaning surfaces, and reinstallation.

4. **Supports Stock Performance**

- If you are running a **stock or mildly modified engine**, this gasket will not negatively impact performance. It is designed for **normal driving conditions** (city, highway, towing, etc.).

- Unlike aftermarket high-flow gaskets, it does not introduce excessive airflow that could destabilize a stock engine.

5. **Long-Term Cost Savings (If Maintained)**

- If the gasket lasts **50,000 miles**, it avoids the need for frequent replacements, saving money in the long run compared to cheaper but less durable aftermarket alternatives that may fail sooner.

---

### **Cons**

1. **Prone to Leaks Over Time**

- The **113-078-00** is known for **gradual degradation**, often leaking **oil, coolant, or vacuum** after **30,000 60,000 miles**, depending on driving conditions.

- **Oil leaks** (from the oil gallery side).

- **Coolant leaks** (if the engine runs hot or has a faulty thermostat).

- **Vacuum leaks** (causing rough idling, check engine lights, or poor acceleration).

- Some owners report **complete failure** (warping, cracking, or complete separation) after **100,000 miles**, especially in high-performance or turbocharged applications.

2. **Sensitive to Installation Quality**

- **Over-torquing** (causing warping or manifold cracks).

- **Under-torquing** (leading to leaks).

- **Contaminated surfaces** (oil, coolant, or debris left on the manifold or cylinder head).

- **Incorrect gasket placement** (misalignment can cause leaks).

- Many leaks occur **within the first 10,000 20,000 miles** post-installation if the job is rushed or sloppy.

3. **Not Ideal for High-Performance or Turbocharged Engines**

- The **113-078-00** is a **stock gasket** designed for **low to moderate power outputs**. In **turbocharged (e.g., AMG M276) or high-RPM applications**, it may:

- **Overheat** due to increased airflow and heat.

- **Develop cracks** from stress.

- **Leak excessively** under boost.

- Aftermarket **high-flow or reinforced gaskets** (e.g., **Fel-Pro, Duralast, or AMG-specific gaskets**) are often recommended for these applications.

4. **Potential for Secondary Damage**

- **Oil dilution in coolant** (if oil leaks into the cooling system).

- **Coolant in the oil** (if coolant leaks into the crankcase).

- **Carbon buildup** in the combustion chamber (from oil leaks).

- **Engine misfires or stalling** (if vacuum leaks cause air to enter the intake).

- In severe cases, **engine damage** (e.g., hydro-locking from coolant in cylinders) can occur.

5. **Limited Lifespan in Harsh Conditions**

- **Extreme heat** (towing, stop-and-go traffic, hot climates).

- **Cold starts** (gelled oil can cause poor sealing).

- **Aggressive driving** (hard acceleration, high RPMs).

- May fail **faster** than expected, requiring **frequent replacements**.

---

### **Conclusion**

The **Mercedes-Benz 113-078-00 intake manifold gasket** is a **practical and cost-effective choice** for **stock or lightly modified M136/M139 engines** if installed correctly and maintained properly. It offers **reliability for moderate mileage** and is easy to replace, making it a **good option for everyday drivers** who keep their engines in good condition.

However, it is **not ideal for high-performance, turbocharged, or heavily modified engines**, where **aftermarket high-flow or reinforced gaskets** are recommended to prevent leaks and ensure longevity. Additionally, **poor installation practices** can lead to **early failure and secondary engine issues**, so **precision and cleanliness during replacement are critical**.

---

### **Recommendation**

- **Buy the 113-078-00 gasket** if you plan to keep the engine **stock or with minor modifications**.

- Clean all mating surfaces thoroughly (use **brake cleaner or acetone**, not water).

- Apply **high-temperature gasket maker** (e.g., **Permatex 24000**) to the gasket edges.

- Torque bolts **in stages** (check Mercedes-Benz service manual for specs).

- **Replace the gasket every 50,000 70,000 miles** as a preventive measure.

- **Monitor for leaks** (check under the car, look for oil/coolant stains, and listen for hissing sounds).

- **Fel-Pro 52000 or 52001** (reinforced, heat-resistant).

- **Duralast 52000** (common aftermarket alternative).

- **AMG-specific gaskets** (if available for your model).

- Consider **upgrading the intake manifold** (e.g., **AMG or aftermarket high-flow manifolds**) if running **forced induction**.

- If you have **mechanical experience**, installing it yourself is **feasible and cost-saving**.

- If you are **unsure about torque specs or surface prep**, **have a mechanic perform the replacement** to avoid leaks.

- **Check for leaks** during routine oil/coolant changes.

- **Replace the gasket proactively** if you notice **oil stains, hissing, or rough idling**.

- **Keep the engine bay clean** (prevents debris from damaging the gasket).

- **Avoid running the engine hot** (prevents warping and premature failure).

The **113-078-00 is a solid choice for stock M136/M139 engines** if installed correctly and replaced at the right intervals. However, **it is not the best long-term solution for high-performance applications**, where aftermarket alternatives are preferable. **Regular inspection and maintenance** are key to maximizing its lifespan.

Details:

Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable. Parts must be resalable and in the original packaging.

part #: 1130780049 prices

• $125.99-$219.95

specifications carfuelinjector:

• for makes: Mercedes
• mpn: 113-078-00-49
• part type: Valve
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included
• replaces part number: 113078004964

shipping carfuelinjector:

• transit: 3-8 Days
• cost: $0.00
• type: Fixed
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• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight

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• # reviews: 5645

general carfuelinjector:

• condition: New
• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors

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offer carfuelinjector:

• availability: In Stock
• quantity: 1
• started: April 21, 2026
• options: Ship-to-home
• sold: 0

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