1. Engine Crankshafts Products
  2. sku: 20158535466715853
  3. UAUTO1 12585671

UAUTO1 12585671 Engine Rear Crankshaft Oil Seal

fits model: Avalanche. make: Chevrolet.

12585671 Uauto1 Engine Rear Crankshaft Oil Seal For Chevrolet Avalanche Main

( Brand: Uauto1 ), ( Manufacturer Part Number: 12585671 ), ( Part Type: Oil Seal Engine Crankshaft ), ( Material: Nbr Rubber ), ( Net Weight: 72g ), ( Shell Color: Black ), ( Placement On Vehicle: Rear ), ( Dimension: 98x115mm / 3.86x4.53 Id Od ), ( Package Content: 1 Pc Crankshaft Oil Seal ), ( Note: This Is Not Oem Product, Accessory Only. ), ( Fitment 1: For Buick Lacrosse 2008-2009 ), ( Fitment 2: For Buick Rainier 2006-2007 ), ( Fitment 3: For Cadillac Cts 2004-2012 ), ( Fitment 4: For Cadillac Escalade 2002-2012 ), ( Fitment 5: For Chevrolet Avalanche 2007-2012 ), ( Fitment 6: For Chevrolet Avalanche 1500 2006 ), ( Fitment 7: For Chevrolet Camaro 1998-2012 ), ( Fitment 8: For Chevrolet Caprice 2011 ), ( California Prop 65 Warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov )

Review UAUTO1 Engine Rear Crankshaft Oil Seal Chevrolet Main fits AVALANCHE

The **Uauto1 12585671 Engine Rear Crankshaft Oil Seal** is a high-performance, precision-engineered sealing component specifically designed to maintain optimal lubrication and prevent oil leakage in the rear crankshaft area of the **Chevrolet Avalanche** (particularly models equipped with the **5.3L V8 engine**). Crafted from durable **nitrile rubber (NBR)** with a reinforced steel spring reinforcement, this oil seal ensures a tight, long-lasting seal under high-pressure conditions, reducing the risk of oil contamination in the transmission or differential. The seal features a **smooth, low-friction lip design** that minimizes wear on the crankshaft while maintaining a consistent barrier against oil seepage, even during extended periods of vehicle use or under heavy loads. Its **precision-molded construction** guarantees an exact fit with the Avalanche s crankshaft housing, eliminating gaps that could lead to leaks or premature failure. Ideal for both **OEM replacement and performance upgrades**, this seal is built to withstand the thermal and mechanical stresses of modern high-output engines, ensuring reliable operation in demanding driving conditions. Whether installed during routine maintenance or as part of a transmission or engine rebuild, the **Uauto1 12585671** provides a dependable solution for maintaining engine cleanliness and preventing costly oil-related damage.

### **Pros and Cons of buying a Uauto1 12585671 Engine Rear Crankshaft Oil Seal for Chevrolet Avalanche**

#### **Pros:**

1. **Compatibility** This part is specifically designed for the Chevrolet Avalanche, ensuring a proper fit and reducing the risk of installation issues.

2. **Durability** Uauto1 is a reputable supplier that typically offers high-quality aftermarket parts, which can last longer than OEM alternatives if properly installed.

3. **Cost-Effective Alternative** Compared to an original equipment manufacturer (OEM) seal, this aftermarket option is often more affordable without sacrificing performance.

4. **Ease of Installation** Since it is a direct replacement, it should fit seamlessly into the existing setup, making the repair process smoother for DIYers.

5. **Warranty Coverage** Uauto1 parts usually come with a warranty, providing some assurance against manufacturing defects.

6. **Wide Availability** As an aftermarket part, it is likely to be readily available online, reducing lead times compared to ordering OEM parts.

#### **Cons:**

1. **Potential Quality Variations** While generally reliable, aftermarket parts may not always match the exact durability of OEM components, especially if the manufacturer cuts corners.

2. **Mixed Reviews on Longevity** Some users report that certain aftermarket seals fail sooner than expected, particularly if the vehicle is driven under extreme conditions (e.g., heavy towing, high RPMs, or extreme temperatures).

3. **Installation Challenges** If the seal is not installed correctly (e.g., improper sealing surface prep or torque specifications), it may leak prematurely, negating the cost savings.

4. **No Brand Recognition** Unlike OEM or well-known brands, Uauto1 may not have the same level of brand trust, which could be a concern for buyers prioritizing long-term reliability.

5. **Potential Counterfeit Risk** There is a chance of receiving a counterfeit or low-quality duplicate, especially if purchasing from unverified sellers. Always check seller ratings and product authenticity.

6. **Limited Customization** Unlike some high-end aftermarket parts, this seal does not offer performance-enhancing features, meaning it will function similarly to an OEM seal unless the issue was related to wear rather than design.

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### **Conclusion**

The **Uauto1 12585671 Engine Rear Crankshaft Oil Seal** is a viable and cost-effective option for replacing a worn or leaking seal in a Chevrolet Avalanche. It offers compatibility, affordability, and ease of installation, making it a practical choice for budget-conscious buyers or those who prefer aftermarket solutions. However, its long-term reliability may vary depending on installation quality, driving conditions, and the specific quality of the unit received.

For **best results**, ensure the seal is installed correctly (using proper gasket maker and torque specifications) and consider pairing it with high-quality oil and filters to extend its lifespan. If the vehicle is heavily used or subjected to extreme conditions, some users may opt for a **higher-end aftermarket brand** or **OEM part** for added confidence in durability.

### **Recommendation**

- **Buy from this part if:**

- You prioritize cost savings and compatibility.

- You are confident in your ability to install it properly.

- You have checked the seller s reputation to avoid counterfeit products.

- The vehicle is not used for extreme towing or high-performance applications.

- **Consider an alternative (e.g., OEM or a well-known brand like Fel-Pro, Sealed Power) if:**

- You require maximum longevity and reliability.

- The vehicle is used for heavy-duty tasks.

- You are unsure about installation quality and want to minimize risk.

For most average drivers, this seal is a **solid budget-friendly choice**, provided it is sourced from a trusted seller and installed correctly. Always verify the part s authenticity and follow manufacturer guidelines for installation.

Details:

Maintains the stability of oil system and transmission improvement. Material: NBR Rubber. For CADILLAC ESCALADE 2002 -2012. Color: Black.

For BUICK RAINIER 2006 - 2007. Engine Rear Crankshaft Oil Seal for CHEVROLET AVALANCHE 12585671 Main Seal: Vehicle Specific Fit:for BUICK LACROSSE 2008 -2009. For CADILLAC CTS 2004 -2012. Position: Rear.

Product highlights: The oil seal prevents engine from leaking out of the crankshaft, hold crank in place firmly and allow it to rotate transfer pass crankshaft.

part #: 12585671 prices

  • $13.99-$16.24

specifications cranshafengin:

  • for models: Avalanche
  • for makes: Chevrolet
  • brand: Uauto1
  • mpn: 12585671
  • part type: Oil Seal Engine Crankshaft
  • material: Nbr Rubber
  • net weight: 72g
  • shell color: Black
  • placement on vehicle: Rear
  • dimension: 98x115mm / 3.86x4.53 Id Od
  • package content: 1 Pc Crankshaft Oil Seal
  • note: This Is Not Oem Product, Accessory Only.
  • fitment 1: For Buick Lacrosse 2008-2009
  • fitment 2: For Buick Rainier 2006-2007
  • fitment 3: For Cadillac Cts 2004-2012
  • fitment 4: For Cadillac Escalade 2002-2012
  • fitment 5: For Chevrolet Avalanche 2007-2012
  • fitment 6: For Chevrolet Avalanche 1500 2006
  • fitment 7: For Chevrolet Camaro 1998-2012
  • fitment 8: For Chevrolet Caprice 2011
  • california prop 65 warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov

returns cranshafengin:

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

shipping cranshafengin:

  • cost: $0.00
  • type: Fixed
  • class: Standard
  • transit: 3-8 Days
  • service: Standard

payments cranshafengin:

  • wallet: Paypal
  • other
  • credit card: Visa

seller cranshafengin:

  • city: Florence, Kentucky
  • # reviews: 27392
  • rating: 99.7%

offer cranshafengin:

  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • quantity: 3
  • started: May 4, 2026

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: New
for models: avalanche, for makes: chevrolet, part type: oil seal engine crankshaft, net weight: 72g, shell color: black, placement on vehicle: rear, dimension: 98x115mm / 3.86x4.53 id od, package content: 1 pc crankshaft oil seal, note: this is not oem product, accessory only., fitment 1: for buick lacrosse 2008-2009, fitment 2: for buick rainier 2006-2007, fitment 3: for cadillac cts 2004-2012, fitment 4: for cadillac escalade 2002-2012, fitment 5: for chevrolet avalanche 2007-2012, fitment 6: for chevrolet avalanche 1500 2006, fitment 7: for chevrolet camaro 1998-2012, fitment 8: for chevrolet caprice 2011, california prop 65 warning: cancer and reproductive harm www.p65warnings.ca.gov,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, material: nbr rubber, sku: 20158535466715853,
Uauto1 12585671 Is Similar To:
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2 offers $13.99–$16.24 USD
  • New. Offer #1 priced at $16.24 + $0.00 shipping estimate = $16.24* total. The oil seal prevents engine oil from leaking out of the crankshaft, hold the crank in place firmly and allow it to rotate and transfer oil to pass to the crankshaft. Manufacturer Part Number .FREE SHIPPING
  • New. Offer #2 priced at $13.99 + $0.00 shipping estimate = $13.99* total. FREE SHIPPING

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