1. Engine Crankshafts Products
  2. sku: 19904335399568604
  3. AC DELCO 85785YZVY

AC DELCO 85785YZVY Crankshaft Seal Retainer Gasket

fits model: 3500, Silverado. make: Chevrolet. year: 2001–2006.

85785yzvy Ac Delco For Chevrolet Silverado 3500 Crankshaft Seal Retainer Gasket

( Brand: Ac Delco ), ( Manufacturer Part Number: 85785YZVY ), ( Part Type: Seal Gasket Crankshaft ), ( Placement On Vehicle: Rear ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Crankshaft Seal Retainer Gasket New ), ( Years: 2001 2002 2003 2004 2005 2006 ), ( Application: Chevrolet Silverado 3500 Crankshaft Seal Retainer Gasket ), ( Product Name 2: Engine Crankshaft Seal Retainer Gasket ), ( Cs-sku: 400 )

Review AC DELCO Chevrolet Crankshaft Seal Retainer Gasket fits SILVERADO 3500 2001–2006

The **AC Delco 85785YZVY Crankshaft Seal Retainer Gasket** is a high-performance, precision-engineered component specifically designed for Chevrolet Silverado 3500 HD models, ensuring optimal sealing and longevity for the engine s crankshaft seal assembly. Crafted from durable, high-grade materials, this retainer gasket is engineered to withstand the intense heat, pressure, and mechanical stress inherent in heavy-duty truck applications. Its robust construction minimizes the risk of leaks, oil contamination, and premature wear, which can compromise engine performance and efficiency. The gasket features a tight, interference-fit design that securely holds the crankshaft seal in place, preventing axial movement and ensuring consistent sealing integrity over time. Ideal for both original equipment replacement and aftermarket upgrades, this component is built to meet or exceed OEM specifications, providing reliable protection against oil leaks and maintaining proper crankshaft alignment. Whether used in routine maintenance or during engine rebuilds, the AC Delco 85785YZVY offers a dependable solution for maintaining the health and longevity of your Silverado s powertrain, ensuring smooth operation and extended service life.

The **AC Delco 85785YZVY crankshaft seal retainer gasket** is a common replacement part for the Chevrolet Silverado 3500 HD, particularly for the 6.0L Duramax diesel engine. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a AC Delco 85785YZVY Gasket**

1. **OEM Quality and Fitment**

The AC Delco brand is a trusted aftermarket supplier that produces parts designed to meet or exceed OEM specifications. This gasket is engineered to fit the 6.0L Duramax engine precisely, reducing the risk of installation issues or leaks. It is a direct replacement for the original equipment part, ensuring compatibility with the Silverado 3500 s crankshaft seal assembly.

2. **Reliability and Durability**

AC Delco parts are known for their durability, especially in high-performance and heavy-duty applications like the Duramax engine. The gasket is typically made from high-quality materials that resist warping, cracking, or premature failure, which is critical for maintaining engine integrity over time. Many users report that AC Delco gaskets last as long as or longer than OEM parts when installed correctly.

3. **Widespread Availability**

This part is widely stocked by auto parts retailers, both online (e.g., RockAuto, Amazon, AutoZone) and in physical stores. Its popularity means it is easy to source, even for those without access to specialized diesel repair shops. Availability also reduces lead times, which is beneficial for those needing to complete repairs quickly.

4. **Cost-Effective Alternative to OEM**

While AC Delco is not an OEM part, it is often significantly cheaper than purchasing a genuine GM (OEM) gasket. For consumers looking to save money without sacrificing quality, this can be a compelling option. The price difference can be substantial, especially when factoring in labor costs for installation.

5. **Positive User Feedback**

Many Duramax owners and mechanics report positive experiences with AC Delco s crankshaft seal retainer gasket. Common praise includes ease of installation, proper sealing performance, and longevity. Reviews often highlight that the gasket holds up well under the stress of the Duramax s high-pressure oil system and turbocharged operation.

6. **Compatibility with Aftermarket Upgrades**

If you ve modified your Duramax engine (e.g., turbo upgrades, fuel system changes, or oil cooler additions), an AC Delco gasket is likely to be compatible with these modifications. Its robust design helps maintain sealing integrity even under altered operating conditions.

7. **Warranty and Return Policies**

AC Delco parts typically come with manufacturer warranties, and many retailers offer return policies if the part is defective or doesn t fit. This provides a safety net for buyers who may encounter issues upon installation.

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### **Cons of buying a AC Delco 85785YZVY Gasket**

1. **Potential Quality Variations**

While AC Delco is a reputable brand, there is a risk of receiving a lower-quality part if the product is counterfeit or from a third-party seller. Counterfeit AC Delco parts may not meet the same manufacturing standards, leading to premature failure, leaks, or installation difficulties. Always purchase from authorized dealers or trusted online retailers to mitigate this risk.

2. **Installation Complexity**

Replacing a crankshaft seal retainer gasket on a Duramax engine is a labor-intensive job that often requires removing the oil pan, turbocharger, and other components. While the gasket itself is straightforward, the surrounding work can be challenging for inexperienced DIYers. Improper installation (e.g., overtightening bolts, misalignment) can damage the gasket or adjacent components, negating its benefits.

3. **Limited Longevity in Harsh Conditions**

Although AC Delco gaskets are durable, extreme operating conditions (e.g., prolonged high RPMs, excessive heat, or contaminated oil) can still lead to premature failure. In such cases, the gasket may not last as long as OEM parts, requiring more frequent replacements. Regular oil changes and proper maintenance can help extend its lifespan.

4. **Potential for Leaks**

If the gasket is not seated correctly or if the mating surfaces (e.g., crankshaft seal or oil pan) are damaged, leaks can occur. This is not unique to AC Delco but is a risk with any aftermarket gasket. Ensuring a clean, smooth surface and using the correct torque specifications during installation is critical to preventing leaks.

5. **Price Sensitivity**

While AC Delco is cheaper than OEM, it may still be more expensive than some generic or budget aftermarket brands. For cost-conscious buyers, there is a temptation to opt for cheaper alternatives, which could compromise quality. However, the trade-off between cost and reliability must be carefully considered.

6. **Availability of OEM Parts**

If you prefer OEM parts for absolute reliability, AC Delco may not be the best choice. OEM gaskets are designed specifically for GM vehicles and may offer slightly better long-term performance, though they come at a higher cost. Some buyers feel more confident using OEM parts, especially for critical components like a crankshaft seal retainer.

7. **Potential for Mix-Ups with Similar Parts**

The Duramax engine has several gaskets and seals that may look similar (e.g., oil pan gaskets, valve cover gaskets, or even different crankshaft seal variants). There is a risk of purchasing a wrong part if the part number is misidentified or if the seller provides incorrect information. Always double-check the part number and fitment against your engine s specifications.

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### **Conclusion**

The **AC Delco 85785YZVY crankshaft seal retainer gasket** is a strong aftermarket alternative to OEM parts for the Chevrolet Silverado 3500 s 6.0L Duramax engine. Its primary advantages lie in its **OEM-like quality, reliability, widespread availability, and cost-effectiveness**, making it a practical choice for most Duramax owners. The part is well-suited for both DIY enthusiasts and professional mechanics, provided the installation is performed carefully.

However, there are **potential downsides**, including the risk of counterfeit parts, installation complexity, and the need for proper maintenance to ensure longevity. While leaks or premature failure are possible, they are mitigated by purchasing from reputable sources and following installation guidelines.

For most users, the **pros outweigh the cons**, especially when balanced against the higher cost of OEM parts. The AC Delco gasket offers a **good balance of quality and affordability**, making it a recommended choice for those seeking a reliable replacement without the premium price of OEM components.

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### **Recommendation**

If you are replacing the crankshaft seal retainer gasket on your **Chevrolet Silverado 3500 HD with a 6.0L Duramax engine**, the **AC Delco 85785YZVY** is an excellent aftermarket option. Here s how to proceed:

1. **Purchase from a Trusted Source**: Buy the part from an authorized AC Delco dealer, a reputable online retailer (e.g., RockAuto, Amazon, or a diesel-specific supplier), or a local auto parts store with a good return policy. Avoid unknown sellers to avoid counterfeit parts.

2. **Verify Fitment**: Confirm that the part number (85785YZVY) matches your engine s specifications. Cross-reference with your vehicle s service manual or consult a Duramax specialist if unsure.

3. **Prepare for Installation**: This job requires removing the oil pan, turbocharger, and possibly the oil cooler. If you lack experience with Duramax repairs, consider hiring a professional mechanic, especially if you re uncomfortable with the complexity of the task.

4. **Follow Installation Guidelines**: Use the correct torque specifications for bolts and ensure the gasket is seated properly. Clean all mating surfaces thoroughly to prevent leaks. Refer to a Duramax repair manual or video guide for step-by-step instructions.

5. **Monitor Post-Installation**: After installation, check for leaks around the gasket during the first few oil changes. If leaks occur, recheck the installation or consult a mechanic.

6. **Maintain Regularly**: Follow the Duramax s recommended maintenance schedule, including oil changes with high-quality diesel oil, to maximize the gasket s lifespan.

**Final Verdict**: The **AC Delco 85785YZVY** is a **highly recommended choice** for replacing the crankshaft seal retainer gasket on your Silverado 3500. It offers a reliable, cost-effective solution that aligns well with the needs of Duramax owners, provided it is installed correctly and sourced from a trusted supplier. For those prioritizing absolute reliability, OEM parts may be worth the extra cost, but for most users, AC Delco provides an optimal balance.

Details:

part #: 85785yzvy price

  • $52.58

specifications cranshafengin:

  • for models: 3500, Silverado
  • for makes: Chevrolet
  • for years: 2001-2006
  • brand: Ac Delco
  • mpn: 85785yzvy
  • part type: Seal Gasket Crankshaft
  • placement on vehicle: Rear
  • manufacturer warranty: 12 Month Warranty
  • notes: Engine Crankshaft Seal Retainer Gasket New
  • years: 2001 2002 2003 2004 2005 2006
  • application: Chevrolet Silverado 3500 Crankshaft Seal Retainer Gasket
  • product name 2: Engine Crankshaft Seal Retainer Gasket
  • cs-sku: 400

seller cranshafengin:

  • city: La Grange, Illinois
  • # reviews: 328818
  • rating: 98.8%

offer cranshafengin:

  • started: April 17, 2026
  • sold: 0
  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock

returns cranshafengin:

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

payments cranshafengin:

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

general cranshafengin:

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

shipping cranshafengin:

  • transit: 4-7 Days
  • class: Standard
  • carrier: FedEx
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • type: Fixed
for models: 3500, silverado, for makes: chevrolet, for years: 2001-2006, part type: seal gasket crankshaft, placement on vehicle: rear, manufacturer warranty: 12 month warranty, notes: engine crankshaft seal retainer gasket new, years: 2001 2002 2003 2004 2005 2006, application: chevrolet silverado 3500 crankshaft seal retainer gasket, product name 2: engine crankshaft seal retainer gasket, cs-sku: 400,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19904335399568604,
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