GM 12735921 Valve Cover

( Brand: Gm ), ( Manufacturer Part Number: 12735921 ), ( Part Type: Valve Cover ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Cadillac ), ( Year: 2016 2017 2018 2019 2020 2021 2022 2023 2024 ), ( Parts Included: Only Part Reference 7 On The Diagram Is Included ), ( Replaces Part Number: 12650072, 12705388 )

Review GM Genuine Valve Cover fits 2016–2024

GM Original Equipment Valve Cover for 1978-1985 Chevrolet and GMC V8 Engines (12735921)

The GM Original Equipment Valve Cover (12735921) is a crucial component designed specifically for the 1978-1985 Chevrolet and GMC V8 engines. This valve cover plays a significant role in protecting the engine's valves and maintaining the proper sealing of the valve train and intake manifold.

The valve cover is engineered using high-quality cast aluminum material, ensuring both durability and lightweight construction. The surface is finished with a smooth, clean coat of factory-applied enamel paint to provide an attractive appearance and resist corrosion.

This GM valve cover features a design that allows easy access to the engine components for routine maintenance and repair tasks. The cover is held in place by six or eight bolts, depending on the engine configuration, and can be easily removed for inspection or replacement.

The valve cover comes equipped with two breather ports, which help maintain the proper crankcase ventilation and prevent harmful crankcase gases from entering the intake system. The breather ports are designed to accommodate the use of an external crankcase ventilation system, ensuring optimal engine performance and longevity.

The GM 12735921 valve cover is a direct fit, meaning it is specifically engineered to work with the engines and applications it is designed for. Using a genuine GM Original Equipment part guarantees a proper fit, improved performance, and peace of mind, knowing that you are using a high-quality part designed and tested by the original manufacturer.

In summary, the GM Original Equipment Valve Cover (12735921) is a vital component for the 1978-1985 Chevrolet and GMC V8 engines, designed to protect the valves, maintain proper sealing, and provide easy access for routine maintenance. Made from durable cast aluminum material, this valve cover offers a smooth finish, easy installation, and improved engine performance.

Buying a GM 12735921 valve cover for your vehicle involves weighing the potential benefits against the costs. Here are some pros and cons to consider:

1. OEM (Original Equipment Manufacturer) Part: This valve cover is a direct replacement part from General Motors, ensuring a proper fit and function for your specific vehicle model.

2. Improved Engine Performance: A worn-out or damaged valve cover can lead to oil leaks, which can negatively impact engine performance. Replacing the valve cover with a new one can help prevent these issues, leading to better engine health and longevity.

3. Peace of Mind: By using a genuine OEM part, you can have confidence that the part will perform as intended and last for a long time, reducing the need for frequent repairs or replacements.

4. Easy Installation: The valve cover is a relatively straightforward component to replace, making it a DIY-friendly project for many vehicle owners.

1. Cost: OEM parts, especially from a reputable manufacturer like General Motors, tend to be more expensive than aftermarket alternatives. The price of the GM 12735921 valve cover may be higher than some aftermarket options.

2. Availability: Depending on your location and the availability of GM parts, you may need to wait for the part to be shipped to you, potentially causing a delay in your repair or restoration project.

3. No Performance Upgrades: Although replacing the valve cover will help improve engine performance by preventing oil leaks, it does not offer any performance upgrades beyond that. If you're looking for increased power or efficiency, you may need to consider other modifications or upgrades.

The decision to buy a GM 12735921 valve cover ultimately depends on your priorities and budget. If you value the peace of mind that comes with using an OEM part, prioritize proper engine function, and don't mind the higher cost, then this may be the best choice for you. On the other hand, if you're looking for a more cost-effective solution or additional performance upgrades, you may want to consider aftermarket alternatives.

If you're confident in the benefits of using an OEM part and are willing to pay the premium price, purchasing the GM 12735921 valve cover is a solid choice for maintaining the health and longevity of your engine. However, if cost is a concern, you may want to explore aftermarket options or consider performing the repair yourself to save on labor costs. Always ensure that you are buying the correct part number for your specific vehicle model to ensure proper fit and function.

Details:

Used or tried parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. 2016 -19, outer. Electrical parts are not returnable.

Parts must be resalable and in the original packaging.

part #: 12735921 prices

• $101.39-$133.94

specifications rockercove:

• for years: 2016-2024
• brand: Gm
• mpn: 12735921
• part type: Valve Cover
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• make: Cadillac
• year: 2016 2017 2018 2019 2020 2021 2022 2023 2024
• parts included: Only Part Reference 7 On The Diagram Is Included
• replaces part number: 12650072, 12705388

shipping rockercove:

• class: Standard, Expedited, One-day
• transit: 4-8 Days
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air Saver
• type: Fixed
• cost: $0.00
• carrier: UPS

seller rockercove:

• city: Tucson, Arizona
• # reviews: 690
• rating: 92.6%

returns rockercove:

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

payments rockercove:

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

offer rockercove:

• availability: In Stock
• sold: 0
• quantity: 1
• options: Ship-to-home
• started: June 17, 2025

general rockercove:

• condition: New
• Engines Engine Parts > Valvetrain Components > Rocker Valve Covers

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