ROCHESTER AC-CV-590C Pcv Valve Fitting Carter Carburetor General 4GC-4JET

( Brand: Rochester ), ( Manufacturer Part Number: AC-CV-590C ), ( Country Of Origin: United States ), ( Modified Item: No ), ( Ipn: Cv-590 ), ( Type: 4gc, 2gc Or Wcfb Pcv Valve ), ( Surface Finish: Natural ), ( Vintage Part: Yes )

Review ROCHESTER General Motors Pcv Valve And Fitting For Or Carter Carburetor Chevrolet

The CV-590 PCV Valve Fitting is a crucial component in the intake system of a Rochester 4GC-4jet carburetor used in certain Chevrolet models. This fitting facilitates the proper functioning of the Positive Crankcase Ventilation (PCV) system, which helps in reducing crankcase pressure and improving engine performance.

The CV-590 PCV Valve Fitting is made of high-quality materials, ensuring durability and reliability. It is designed with a thread size of 5/8-14 UNF (Unified National Fine) to fit the specific requirements of the Rochester 4GC-4jet carburetor. The fitting's inlet side is intended for the connection of the PCV valve, while the outlet side is designed to connect to the intake manifold or the engine's crankcase.

This fitting features a smooth, even internal thread to ensure a secure connection and prevent leaks. It also includes a gasket or an O-ring to create a seal between the fitting and the intake manifold or the engine crankcase. The gasket or O-ring helps prevent air leaks while maintaining a vacuum, thus improving the engine's efficiency.

The CV-590 PCV Valve Fitting is an essential upgrade for car enthusiasts and mechanics working on their Chevrolet vehicles with the Rochester 4GC-4jet carburetor. It is an excellent replacement for worn-out or damaged fittings, ensuring the optimal performance of the PCV system and the engine.

Installing the CV-590 PCV Valve Fitting is a straightforward process and can be done in a few simple steps. First, remove the old fitting and the gasket or O-ring. Then, clean the threads and the mating surfaces. After that, apply a thread sealant and carefully screw in the new fitting. Finally, install the new gasket or O-ring and tighten the fitting to the recommended torque specification.

In summary, the CV-590 PCV Valve Fitting is a critical component that plays a significant role in the proper functioning of the Rochester 4GC-4jet carburetor's PCV system in select Chevrolet vehicles. Made of high-quality materials and designed with the correct thread size, this fitting ensures a secure connection, prevents leaks, and helps improve engine performance.

Buying a CV-590 PCV valve fitting for a Rochester 4GC-4jet Carter carburetor on a Chevrolet vehicle involves considerations of compatibility, performance, and cost. Here are the pros and cons of this purchase.

1. Improved Engine Performance: Installing a CV-590 PCV valve can help improve engine performance by reducing vacuum leaks and improving the flow of gases in the intake manifold.

2. Better Idle Stability: A properly functioning PCV system can help provide better idle stability, reducing surging and stalling, especially during cold starts.

3. Enhanced Emissions Compliance: The CV-590 PCV valve can help improve the emissions performance of the vehicle by reducing the amount of unburnt hydrocarbons and carbon monoxide in the exhaust.

1. Cost: A new CV-590 PCV valve fitting can be an expensive purchase, especially if the vehicle owner is doing it as a DIY project. The cost of the part itself, as well as tools and labor, can add up.

2. Complexity of Installation: Installing the CV-590 PCV valve fitting can be a complex process, especially for those without extensive mechanical experience. It may require the removal of various components of the engine and intake manifold, as well as the use of specialized tools.

3. Potential for Damage: During the installation process, there is a risk of damaging other components of the engine or intake manifold if the installation is not done properly.

The purchase of a CV-590 PCV valve fitting for a Rochester 4GC-4jet Carter carburetor on a Chevrolet vehicle involves a balance of potential benefits and challenges. While the installation can provide improved engine performance, better idle stability, and enhanced emissions compliance, it also comes with a significant cost and the potential for complexity and damage.

If the vehicle owner is comfortable with the complexity of the installation process and has the necessary tools and experience, then purchasing a CV-590 PCV valve fitting can be a worthwhile investment for improved engine performance and emissions compliance. However, if the vehicle owner is not confident in their ability to install the part themselves, it may be worth considering hiring a professional mechanic to do the job to ensure that it is done correctly and avoid any potential damage to the engine or other components.

Details:

This is the GOOD OL' ORIGINAL PART. Appears identical to the CV590. This valve is the RARE, earlier, heavier, machined version.The later ones were lighter, stamped steel. This fits the Carter WCFB and Rochester 2GC also.

part #: accv590c prices

• $95.00-$175.00

specifications carbcoon:

• for makes: Rochester, Chevrolet
• brand: Rochester
• mpn: Ac-cv-590c
• country of origin: United States
• modified item: No
• ipn: Cv-590
• type: 4gc, 2gc Or Wcfb Pcv Valve
• surface finish: Natural
• vintage part: Yes

returns carbcoon:

• policy: No Returns

seller carbcoon:

• rating: 100.0%
• city: Albion, Illinois
• # reviews: 691

shipping carbcoon:

• class: Economy
• transit: 4-10 Days
• cost: $10.00
• service: Economy
• type: Fixed

general carbcoon:

• condition: Remanufactured
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

offer carbcoon:

• availability: In Stock
• sold: 0
• quantity: 1
• started: January 27, 2026
• options: Ship-to-home

payments carbcoon:

• wallet: Google-pay
• other
• credit card: Mastercard

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