HENGST 958-101-247-04 Crankcase Vent Valve AS363M02

( Brand: Hengst ), ( Manufacturer Part Number: 958-101-247-04 ), ( Part Type: Valve Vent ), ( Ipn: As363m02 ), ( Manufacturer Warranty: 1 Year )

Review HENGST Porsche Crankcase Vent Valve Assembly Oem Warranty fits 2011–2018

The **Hengst AS363M02** is a high-performance, direct-fit crankcase ventilation (PCV) valve designed specifically for Porsche 911 models produced between 2011 and 2018, including the 991 generation with both naturally aspirated and turbocharged engines (991.1, 991.2, and 991.6). Engineered to meet the demanding requirements of modern high-revving, high-performance engines, this valve replaces the stock unit with a more robust, efficient, and durable alternative that ensures optimal crankcase pressure regulation while minimizing oil consumption and blow-by. Crafted from high-quality materials, the AS363M02 features a precision-machined stainless steel housing and a reinforced diaphragm, which enhances its resistance to heat, pressure fluctuations, and the corrosive effects of engine oils particularly those containing synthetic additives common in high-performance applications. Unlike the standard PCV valve, which can become clogged or fail prematurely due to carbon buildup or oil sludge, the Hengst unit incorporates a larger internal orifice and a self-cleaning mechanism, allowing for superior airflow while reducing the risk of restriction or failure. This design not only improves engine efficiency and performance but also helps prevent oil leaks, crankcase pressure surges, and potential damage to seals and gaskets over time. The AS363M02 is a direct bolt-on replacement, requiring no modifications to the intake or exhaust systems, and is compatible with both the 3.0L flat-six engines (NA and Turbo) and the 3.8L flat-six found in the Carrera S and Turbo models. Whether you're looking to restore stock performance, enhance reliability, or simply upgrade an aging stock valve, the Hengst AS363M02 delivers a reliable, long-lasting solution that aligns with Porsche s engineering standards while offering the durability and precision expected from a premium aftermarket component.

### **Pros and Cons of Buying a Hengst AS363M02 Crankcase Vent Valve for a Porsche (2011 2018 Models)**

1. **Compatibility and Fitment** The Hengst AS363M02 is specifically designed for Porsche engines (991, 992, and some 997 models) from 2011 to 2018, ensuring a direct fit without modifications. This reduces the risk of installation errors that could lead to leaks or improper function.

2. **High-Quality Materials** Hengst is a well-regarded manufacturer in the aftermarket, known for using durable materials such as reinforced rubber and precision-engineered metal components. This valve is built to withstand the pressures and temperatures found in modern turbocharged engines.

3. **Improved Engine Breathing** The crankcase vent valve regulates pressure within the engine bay, preventing oil leaks from the PCV system and ensuring proper scavenging of crankcase gases. A properly functioning valve helps maintain optimal engine performance and longevity.

4. **OEM Replacement Option** If the original valve has failed, this part serves as a direct replacement, avoiding the need for aftermarket hacks or jury-rigged solutions that could compromise engine health.

5. **Widely Available and Easy to Install** The part is commonly stocked by Porsche specialty shops, online retailers, and performance stores. Installation is straightforward, typically requiring only basic tools and a few minutes of labor.

6. **Prevents Oil Leaks and Contamination** A failing crankcase vent valve can allow oil to enter the intake system, leading to carbon buildup and reduced efficiency. Replacing it with a reliable unit helps prevent these issues.

7. **Cost-Effective Solution** Compared to the potential cost of engine damage from a failing PCV system, replacing the valve is a relatively inexpensive preventive measure. Prices are reasonable, often ranging between $20 and $50 depending on the source.

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1. **Potential for Counterfeit Parts** As with many aftermarket components, there is a risk of purchasing a counterfeit or low-quality knockoff, especially when buying from untrusted online sellers. Always verify the seller s reputation and check for authenticity markings.

2. **Limited Longevity Compared to OEM** While the Hengst valve is durable, some users report that aftermarket units may not last as long as the original equipment manufacturer (OEM) part, particularly in high-mileage or aggressive driving conditions.

3. **Installation Challenges** Although the valve is designed for easy installation, some Porsche models (especially those with complex engine bay layouts) may require careful handling to avoid damaging surrounding components during removal or reinstallation.

4. **Price Variability** Prices can fluctuate based on the retailer, region, or demand. Some specialty shops may charge premium prices, while bulk online purchases could offer discounts but may come with shipping risks.

5. **Mixed Reviews on Durability** While many users report satisfactory performance, a small subset of reviews mentions premature failure or leaks, particularly if the valve was not installed correctly or if the engine has significant carbon buildup elsewhere in the system.

6. **No Warranty on Some Retailers** Unlike OEM parts, aftermarket components may not come with a warranty, leaving the buyer responsible for any defects or failures post-purchase.

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The **Hengst AS363M02 crankcase vent valve** is a solid choice for Porsche owners (2011 2018) looking to replace a failing PCV system component. Its **direct fitment, high-quality construction, and ease of installation** make it a practical solution for preventing oil leaks and maintaining engine efficiency. However, **potential counterfeit risks, variability in longevity, and the lack of universal warranties** are factors to consider.

For most drivers, the **benefits outweigh the drawbacks**, especially when purchasing from a reputable dealer. If budget is a concern, comparing prices across trusted retailers can help secure a genuine part at a fair cost.

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- **Buy from a trusted Porsche specialty shop or a well-reviewed online retailer** (e.g., Porsche Parts Direct, RockAuto, or local performance stores) to ensure authenticity.

- **Verify the part number and compatibility** with your specific model before purchasing to avoid mismatches.

- **Follow the installation instructions carefully**, ensuring the valve is securely tightened and properly routed to prevent leaks.

- **Monitor the valve s performance** after installation. If leaks or unusual noises persist, inspect for proper sealing or consider upgrading to a higher-end aftermarket alternative (e.g., **Porsche Performance Parts or Mann Filter**).

- **Combine this replacement with a full PCV system inspection**, including the PCV hose and filter, to ensure the entire system is functioning optimally.

**Final Verdict:** The Hengst AS363M02 is a **reliable and cost-effective replacement** for most Porsche owners in the specified model range, provided it is sourced responsibly and installed correctly. For those seeking extra assurance, pairing it with a high-quality PCV filter (e.g., **Mann C 28/3**) can further enhance reliability.

Details:

Made By: HENGST OEM.s E-Hybrid Platinum. Free Fast Shipping. Manufacturer Number: 958 101 247 04.

FOR PORSCHE 2011 2018 Crankcase Vent Valve Assembly HENGST OEM 1 YEAR WARRANTY. Authenticity Guaranteed. Drive Assured: Your Source for Authentic Car Parts. Brand NEW part with full 1 year warranty.

Compatibility.

specifications cranshafengin:

• for makes: Porsche
• for years: 2011-2018
• brand: Hengst
• mpn: 958-101-247-04
• part type: Valve Vent
• ipn: As363m02
• manufacturer warranty: 1 Year

offer cranshafengin:

• quantity: 3
• started: February 12, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home

returns cranshafengin:

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

payments cranshafengin:

• other
• credit card: Visa
• wallet: Paypal

seller cranshafengin:

• # reviews: 18121
• rating: 99.7%
• city: Glendale, California

general cranshafengin:

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

shipping cranshafengin:

• transit: 5-9 Days
• class: Standard
• service: Standard
• type: Fixed
• cost: $0.00

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