HomeEngine > Valve Train ComponentsCloyes S1021 Engine Timing Crankshaft Sprocket - Outer
Part #: S1021

Cloyes S1021 Engine Timing Crankshaft Sprocket - Outer

Outer
⚙️ 15 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mazda, 3, 6, and CX-7
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Overview of Cloyes Engine Timing Crankshaft Sprocket S1021

The Cloyes S1021 engine timing crankshaft sprocket is engineered for precise timing control in Mazda vehicles, including the Mazda 3, Mazda 6, and CX-7 models. Constructed from durable steel, this sprocket ensures reliable performance and longevity in the valve train system.

  • Material: High-strength steel for durability
  • Inside Diameter: 1.04 inches (26.416 mm)
  • Outside Diameter: 2.06 inches (52.324 mm)
  • Tooth Quantity: 20 teeth for accurate chain engagement
  • Single chain row design
  • Mounting Hole Diameter: 1.04 inches (26.416 mm), single hole
  • Tooth Width: 0.169 inches (4.2926 mm)
  • Overall Width: 0.43 inches (10.922 mm)
  • Includes one timing mark for alignment

Detailed Product Description

The Cloyes S1021 crankshaft sprocket is a critical component in the engine timing system, designed to maintain precise synchronization between the crankshaft and camshaft. Made from steel, it offers resistance to wear and heat, essential for maintaining engine timing accuracy. The sprocket features 20 teeth and a single chain row, optimized for smooth chain engagement and reduced slippage. Its dimensions, including a 1.04-inch inside diameter and 2.06-inch outside diameter, are tailored to fit specific Mazda engines, ensuring compatibility and proper fitment.

Compatible Mazda Models and Applications

  • Compatible with Mazda 3 models requiring a 20-tooth crankshaft sprocket
  • Fits Mazda 6 engines designed for this specific sprocket size
  • Suitable for Mazda CX-7 vehicles with matching timing chain specifications
  • Ideal for engine timing repairs and maintenance in these Mazda models

Installation Notes and Tips

When installing the Cloyes S1021 crankshaft sprocket, ensure the timing mark aligns precisely with the corresponding marks on the timing chain and camshaft sprocket. Verify the mounting hole diameter matches the crankshaft journal to avoid misalignment. Use proper torque specifications as outlined in the vehicle’s service manual to secure the sprocket without damaging the component or engine parts.

Quality Assurance and Warranty

Cloyes manufactures the S1021 sprocket to meet OEM standards, ensuring reliable performance and durability. The steel construction provides resistance to wear and heat, contributing to long service life. While specific warranty details are not provided, Cloyes products typically adhere to industry quality controls and are backed by manufacturer support for defects in materials and workmanship.

BrandCloyes
Part NumberS1021
MaterialSteel
Inside Diameter1.04
Inside Diameter26.416
Outside Diameter2.06
Outside Diameter52.324
Tooth Quantity20
Chain Row Quantity1
Keyway NotchNo
Mounting Hole Diameter (uom:in)1.04
Mounting Hole Diameter (uom:mm)26.416
Mounting Hole Quantity1
Timing Mark Quantity1
Tooth Width (uom:in)0.169
Tooth Width (uom:mm)4.2926
Width (uom:in)0.43
Width (uom:mm)10.922

This part fits 15 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2013Mazda32.3LL4Outer
2012Mazda32.3LL4Outer
2012MazdaCX-72.3LL4Outer
2011Mazda32.3LL4Outer
2011MazdaCX-72.3LL4Outer
2010Mazda32.3LL4Outer
2010MazdaCX-72.3LL4Outer
2009Mazda32.3LL4Outer
2009MazdaCX-72.3LL4Outer
2008Mazda32.3LL4Outer
2008MazdaCX-72.3LL4Outer
2007Mazda32.3LL4Outer
2007Mazda62.3LL4Outer
2007MazdaCX-72.3LL4Outer
2006Mazda62.3LL4Outer

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

L3K9-11-316-AS1021

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.