Description
Product Overview
The GM Genuine Parts thrust washer is engineered to meet original equipment manufacturer (OEM) standards for Chevrolet, Buick, GMC, and Cadillac engines. Featuring a conical spring design, the washer distributes load evenly across the thrust surface, reducing wear and maintaining proper engine timing. Constructed from high‑strength steel with a precision‑machined exterior finish, it offers corrosion resistance and long‑term durability. Dimensions are 2.3 x 2.3 x 0.3 inches, and the fastener size matches the original 2.3‑inch specification, ensuring a perfect fit without modification.
Usage

This thrust washer is ideal for engine rebuilds, timing chain replacements, and routine maintenance where thrust bearing integrity is critical. It performs best in high‑temperature engine environments, providing consistent load transfer during acceleration and deceleration. Mechanics, DIY enthusiasts, and professional service centers will find it suitable for both domestic and commercial repair shops.
Why Choose Us
GM Genuine Parts are designed, engineered, and tested to rigorous standards backed by General Motors. Each washer undergoes strict quality control to ensure dimensional accuracy and material integrity. The conical spring design offers superior load distribution compared to flat washers, extending service intervals and reducing the risk of premature engine wear. As an OEM‑approved component, it guarantees compatibility and reliability.
Key Features
- Conical spring design for even load distribution and reduced wear.
- Precision‑machined exterior finish enhances corrosion resistance.
- Exact 2.3‑inch dimensions match OEM specifications for a seamless fit.
- Lightweight construction at 0.16 oz (4.54 g) simplifies handling and installation.
- Backed by GM engineering, ensuring quality and performance for Chevrolet, Buick, GMC, and Cadillac engines.
FAQ
Is this thrust washer compatible with all GM engine models?
It is designed for engine applications that originally used the GM part number 12578073, covering a wide range of Chevrolet, Buick, GMC, and Cadillac models. Verify your vehicle’s service manual for exact fit.
Can I install the washer myself?
Yes, the washer installs directly onto the engine thrust surface using the standard 2.3‑inch fastener. Basic hand tools and a torque wrench are sufficient for proper installation.
What material is the washer made of?
The washer is made from high‑strength steel with a machined finish, providing durability and resistance to engine heat and corrosion.
How does the conical spring design improve performance?
The conical shape allows the washer to compress uniformly under load, distributing thrust forces evenly and minimizing localized stress, which helps extend engine component life.
Do I need any special tools to replace this part?
No special tools are required beyond standard automotive hand tools. Ensure the fastener is torqued to the manufacturer’s specifications for optimal performance.






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