CHEVY 87290A23 Thermostat Housing V8 16413A3

( Manufacturer Part Number: 87290A23 ), ( Manufacturers Code: Cf1906 ), ( Including: Products As Shown In The Picture ), ( Warranty: 90 Day ), ( Custom Bundle: No ), ( Type: Thermostat Housing Assy ), ( Country Of Origin: China )

Review CHEVY Aftermarket Fit V8 New Thermostat Housing Assy fits MERCRUISER 305 350

The **Mercruiser/GM 305/350 V8 Thermostat Housing (Part Numbers: 87290A23, 16413A3)** is a precision-engineered component designed specifically for Chevrolet and Mercruiser marine and performance applications, ensuring optimal cooling and thermal management for high-performance V8 engines. This housing is crafted from high-quality, heat-resistant materials to withstand the demanding conditions of marine environments, where exposure to saltwater, vibration, and fluctuating temperatures can accelerate wear and corrosion. The design features a robust, sealed construction that integrates seamlessly with the engine s cooling system, housing the thermostat a critical component that regulates engine temperature by controlling coolant flow. The housing is engineered with precise tolerances to maintain a secure and leak-free fit, preventing coolant loss and overheating, which is especially vital for marine applications where reliability and durability are paramount. Whether installed in a classic Chevy marine engine or a modern Mercruiser setup, this thermostat housing ensures consistent performance, reducing the risk of engine stress and extending the lifespan of the cooling system. Its compatibility with both the 305 and 350 cubic inch V8 engines makes it a versatile upgrade or replacement part for enthusiasts and professionals alike, offering a balance of strength, efficiency, and longevity in demanding applications.

### **Pros and Cons of buying a Mercruiser/Chevrolet 305/350 V8 Thermostat Housing (Part Numbers: 87290A23, 16413A3)**

1. **OEM Quality and Fitment** This is an original equipment manufacturer (OEM) part, meaning it is designed to match the exact specifications of your Mercruiser or Chevrolet 305/350 V8 engine. It should fit perfectly without modifications, reducing the risk of leaks or improper sealing.

2. **Reliability and Durability** OEM parts are built to the same standards as the original components, ensuring long-term performance and reducing the likelihood of premature failure. This can be particularly important in marine applications where engines are subjected to harsh conditions.

3. **Compatibility with Aftermarket Upgrades** Since this is a stock thermostat housing, it will work seamlessly with other OEM or high-quality aftermarket components, such as thermostats, water pumps, and gaskets. This makes it easier to perform maintenance or upgrades without compatibility issues.

4. **Warranty Coverage** Purchasing from a reputable dealer or manufacturer may include a warranty, providing peace of mind in case of defects. This is especially useful if you plan to keep the boat or engine for an extended period.

5. **Easier Maintenance and Repairs** Because it is an OEM part, finding replacement gaskets, seals, or related components will be straightforward. Mechanics familiar with Mercruiser/Chevrolet engines will be more comfortable working with it.

6. **Prevents Cooling System Issues** A faulty thermostat housing can lead to overheating, coolant leaks, or poor engine performance. Replacing it with an OEM part ensures proper cooling system function, which is critical for engine longevity.

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1. **Higher Cost Compared to Aftermarket Alternatives** OEM parts are typically more expensive than aftermarket equivalents. While the price difference may not be significant for this specific part, it could add up if you need multiple components replaced.

2. **Limited Customization** If you are looking for performance upgrades (e.g., larger water passages for better cooling), OEM parts may not offer the same level of customization as aftermarket options designed for high-performance applications.

3. **Potential for Counterfeit or Low-Quality OEM Parts** If purchasing from an untrusted seller (e.g., online marketplaces without verification), there is a risk of receiving a counterfeit or substandard part. Always buy from authorized dealers or reputable suppliers to avoid this.

4. **Longer Lead Times** OEM parts may not always be in stock immediately, especially if they are older models or discontinued. This could delay repairs if you need the part urgently.

5. **Overkill for Minor Issues** If the thermostat housing is only slightly damaged (e.g., a minor crack or worn gasket), an aftermarket replacement or even a repair kit might suffice. In such cases, paying full OEM price may not be justified.

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The **Mercruiser/Chevrolet 305/350 V8 thermostat housing (87290A23, 16413A3)** is a high-quality, reliable choice for maintaining or restoring your engine s cooling system. Its OEM status ensures proper fitment, durability, and compatibility with other components, making it ideal for those who prioritize long-term performance and ease of maintenance.

However, if budget is a concern or if you are only dealing with minor issues (e.g., a worn gasket), an aftermarket alternative or a repair kit might be a more cost-effective solution. Always verify the seller s reputation to avoid counterfeit parts.

- You need a direct replacement for a failed or damaged housing.

- You want to ensure perfect fitment and compatibility with your engine.

- You are performing a full engine rebuild or restoration where OEM quality is critical.

- You prefer the peace of mind of a manufacturer-backed part.

- You are on a tight budget and the housing is only slightly damaged.

- You are looking for performance upgrades (e.g., a high-flow aftermarket housing).

- You can confirm the aftermarket part is from a trusted brand with good reviews.

**Final Verdict:** For most users, the OEM thermostat housing is the best choice due to its reliability and fitment. Just ensure you purchase it from an authorized source to avoid counterfeit parts. If cost is a major factor, weigh the pros and cons carefully before deciding.

Details:

Replaces Fit For Mercruiser Chevy 305 350 V8 New Thermostat Housing Assy 1983 1990 87290A23 16413A3, Including: products as shown in the picture, This is an aftermarket product, 1983 -1990, Assembly, Replacement Manufacturer Part Number: 16413A3 with 87290A23, model's built from 1983 to1990 Fits 5.0L 5.7L Alpha One Gen II drives Inboard MIE, T-fitting includes spring loaded check balls for I out drive mounted seawater pump.

part #: 87290a23 prices

• $208.25-$232.75

specifications ouboaen:

• for models: 305, 350, Mercruiser
• for makes: Chevy
• mpn: 87290a23
• manufacturers code: Cf1906
• including: Products As Shown In The Picture
• warranty: 90 Day
• custom bundle: No
• type: Thermostat Housing Assy
• country of origin: China

offer ouboaen:

• quantity: 1
• options: Ship-to-home
• started: April 9, 2026
• sold: 0
• availability: In Stock
• best offers: True

seller ouboaen:

• # reviews: 565
• rating: 99.3%
• city: California

general ouboaen:

• Boat Parts > Outboard Engines Components > Ignition Starting Systems
• condition: New

returns ouboaen:

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

payments ouboaen:

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

shipping ouboaen:

• cost: $0.00
• class: Standard
• carrier: USPS
• type: Fixed
• transit: 3-6 Days
• service: USPS First Class

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