Description
Product Overview
Designed for Chevrolet and Ford water pumps, the SHLPDFM shim set provides precise alignment between the water pump and the drive pulley. The package includes two 1/16‑inch thick shims and one 1/8‑inch thick shim, matching OEM part number 6129. Constructed from high‑strength steel, each shim resists deformation under the high‑temperature and high‑vibration conditions of modern engines.
Usage
Install the shims between the water pump and the accessory pulley during routine maintenance or when replacing a water pump. Ideal for engines that operate above 6,000 RPM, the shims keep the belt centered, preventing premature wear and ensuring consistent coolant flow.

Why Choose Us
SHLPDFM is a trusted manufacturer in automotive components, offering rigorous quality control and precise machining tolerances. Our shims are tested for dimensional accuracy and corrosion resistance, guaranteeing a perfect fit and long‑term durability compared to generic aftermarket parts.
Key Features
- Fits most Chevrolet and Ford water pumps with 5/8″ and 3/4″ center shafts
- Two 1/16″ and one 1/8″ thick shims for optimal belt tension
- High‑strength steel construction resists heat and vibration
- Matches OEM part number 6129 for direct replacement
- Improves pulley alignment, reducing belt slip at high RPM
FAQ
What engines are compatible with these shims?
The shims are designed for most Chevrolet and Ford engines that use a water pump with a 5/8″ or 3/4″ center shaft. Check your vehicle’s service manual for exact fitment.
Do I need any special tools to install the shims?
No special tools are required. The shims are thin enough to fit between the pump and pulley and can be installed with basic hand tools such as a socket set and a torque wrench.
Can these shims be used on aftermarket water pumps?
Yes, as long as the aftermarket pump uses the same center shaft dimensions (5/8″ or 3/4″), the shims will provide the same alignment benefits.
How do the shims improve engine performance?
By maintaining proper pulley alignment, the shims prevent belt slip and wear, ensuring consistent water pump operation and reliable coolant circulation, especially at high engine speeds.
Are the shims covered by a warranty?
All SHLPDFM shims come with a limited one‑year warranty against manufacturing defects, reflecting our confidence in product quality.




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