STANDARD MOTOR PRODUCTS V344 Pcv Valve 045-0284 D21

( Brand: Standard Motor Products ), ( Manufacturer Part Number: V344 ), ( Part Type: Valve Motor ), ( Manufacturer Warranty: 1 Year ), ( Ipn: 045-0284 ), ( Country Of Origin: Mexico )

Review STANDARD MOTOR PRODUCTS Pcv Valve Nissan D21 Pickup fits ALTIMA 240SX 1990–1998

The **Standard Motor 045-0284 V344 PCV Valve** is a precision-engineered component designed specifically for Nissan vehicles equipped with the **SR20DE and SR20DET engines**, covering models such as the **1990 1998 Nissan 240SX, 1993 1998 Nissan Altima (D21 platform), and other compatible SR20-powered applications**. This **third-generation (V344) Positive Crankcase Ventilation (PCV) valve** plays a critical role in maintaining optimal engine performance, emissions compliance, and long-term reliability by regulating the flow of crankcase gases through the intake system. Crafted from high-quality materials, the valve features a **durable metal housing** with a **precision-machined internal diaphragm and spring assembly**, ensuring consistent operation under varying engine temperatures and vacuum conditions. Unlike generic or aftermarket alternatives, this valve is **directly sourced from Standard Motor**, a trusted manufacturer known for its adherence to OEM specifications, guaranteeing a seamless fit and identical functionality to the original equipment part. The **V344 variant** is particularly notable for its **improved sealing mechanism and enhanced flow characteristics**, which help prevent oil consumption, reduce carbon buildup on intake valves, and minimize crankcase pressure fluctuations common issues in high-mileage or poorly maintained engines. Whether installed in a **restored classic 240SX, a daily-driven Altima, or a performance-tuned SR20 application**, this PCV valve ensures proper ventilation, supports cleaner combustion, and contributes to the overall health of the engine s internal components. Its **universal compatibility** with the SR20DE and SR20DET engines makes it an essential upgrade for enthusiasts seeking to restore factory emissions standards, eliminate rough idle conditions, or prevent long-term engine wear. With its **reliable construction and OEM-level performance**, the Standard Motor 045-0284 V344 PCV valve is the ideal choice for maintaining peak efficiency in Nissan s iconic inline-four engines.

### Pros and Cons of buying a Standard Motor 045-0284 V344 PCV Valve for 1990 1998 Nissan 240SX/Altima (D21 Engine)

1. **Compatibility** The Standard Motor 045-0284 V344 is specifically designed for the Nissan D21 engine family, which includes the 240SX and Altima from 1990 to 1998. This ensures a direct fit without modifications.

2. **Quality Construction** Standard Motor is a reputable brand known for producing reliable aftermarket parts. The PCV valve is built to handle the engine s crankcase ventilation needs effectively, reducing blow-by and maintaining proper pressure.

3. **Prevents Oil Contamination** A faulty PCV valve can allow unburned fuel and oil vapors to enter the intake system, leading to oil dilution in the crankcase or carbon buildup on intake valves. A functioning PCV valve helps prevent these issues.

4. **Easy Installation** The valve is straightforward to replace, requiring minimal tools. Most owners can swap it out in under an hour, even without advanced mechanical experience.

5. **Cost-Effective** Compared to OEM (original equipment manufacturer) parts, this aftermarket valve is often priced lower while maintaining comparable performance and durability.

6. **Reduces Engine Wear** By properly venting crankcase gases, the valve helps reduce internal engine wear caused by excessive pressure buildup.

7. **Widely Available** This part is stocked by many auto parts retailers (both online and in-store), ensuring easy access for replacement.

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1. **Potential Counterfeit Concerns** Some aftermarket parts, including PCV valves, may be counterfeit or low-quality knockoffs, especially if purchased from untrusted sellers. Always buy from reputable suppliers (e.g., RockAuto, Amazon, local auto parts stores with return policies).

2. **Mixed Reviews on Durability** While Standard Motor is generally reliable, some users report that the PCV valve may wear out prematurely, particularly if the engine has significant carbon buildup or oil sludge. This could require more frequent replacements.

3. **No Direct OEM Part** Unlike an OEM PCV valve, this aftermarket part may not have the exact same internal design or tolerances, though the difference is usually negligible for most drivers.

4. **Limited Warranty** Standard Motor typically offers a limited warranty (often 1 2 years), which may not cover all potential failure modes, especially if installed incorrectly or if the engine has underlying issues.

5. **Possible Incompatibility with Modified Engines** If the engine has been heavily modified (e.g., forced induction, aggressive camshafts, or high-performance tuning), the stock PCV valve may not handle the increased crankcase pressure effectively. In such cases, a high-flow PCV valve might be necessary.

6. **Installation Risks** If the engine has accumulated carbon or sludge, removing the old PCV valve could be messy. Failure to clean the valve housing or intake manifold thoroughly before installation could lead to future issues.

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The **Standard Motor 045-0284 V344 PCV valve** is a solid, cost-effective choice for the 1990 1998 Nissan 240SX/Altima (D21 engine). It offers reliable performance, easy installation, and prevents common issues like oil dilution and carbon buildup. However, buyers should ensure they purchase from a trusted source to avoid counterfeit parts and be aware that it may not last indefinitely in high-mileage or heavily modified engines.

For most stock or lightly modified engines, this valve is a **recommended replacement** over running a faulty or clogged PCV system. If the engine has significant carbon buildup or is heavily modified, consider pairing this valve with a valve cover gasket replacement and intake manifold cleaning for optimal results.

Purchase the **Standard Motor 045-0284 V344 PCV valve** from a reputable retailer (e.g., RockAuto, Amazon, or a local auto parts store with a return policy). Replace it as part of a routine maintenance check, especially if the old valve is clogged or cracked. If symptoms like excessive oil consumption, rough idle, or a hissing sound persist after replacement, inspect the valve housing, intake manifold, and valve cover gasket for leaks or blockages.

Details:

Nissan: 1181086G01. All accessories hardware. Placing an order outside the US is easy. Original packaging.

AcDelco: CV2520C. SPECIFICATIONS: Attachment Method:Screw-in, Cap Included:No, Color/Finish:Black, Connector Gender:No Connector, Contents:Valve, Gaskets Hose Quantity:1, Size - Inches:3/8,mm: 10mm, Inlet Diameter in: 0.22, mm : 5.588, Material:Metal, Mounting Bracket Nipple Orientation:Straight, Outlet in: 0.2, mm : 5.08, Thread in: 3/8 NPT. Standard Motor Products V344 PCV Valve For 90-98 Nissan 240SX Altima D21 Pickup.

specifications emissyste:

• for models: 240sx, Altima
• for makes: Nissan
• for years: 1990-1998
• brand: Standard Motor Products
• mpn: V344
• part type: Valve Motor
• manufacturer warranty: 1 Year
• ipn: 045-0284
• country of origin: Mexico

returns emissyste:

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

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New

shipping emissyste:

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

offer emissyste:

• started: February 3, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 10

seller emissyste:

• city: Miami, Florida
• rating: 99.4%
• # reviews: 144181

payments emissyste:

• wallet: Paypal
• other
• credit card: Visa

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