Maintain proper balancer shaft chain tension and dependable engine operation with the Genuine Honda Balancer Shaft Chain Tensioner (13450-RBC-004). Designed for the 2006–2011 Honda Civic Si equipped with the K20Z3 engine, this original equipment replacement component helps maintain the correct tension on the balancer shaft drive chain within the engine's oil pump and balance shaft assembly.

The balancer shaft system is designed to reduce engine vibration and improve overall smoothness. Its drive chain must maintain proper tension to ensure consistent operation and correct synchronization of the rotating components. The chain tensioner plays an important role in controlling chain slack and maintaining reliable engagement with the associated sprockets.

Over time, internal wear, mechanical damage, or deterioration of the chain tensioning system can compromise proper chain control. Excessive chain slack may contribute to abnormal engine noise, increased vibration, and accelerated wear of related components.

Manufactured to Honda's original equipment specifications, the 13450-RBC-004 Balancer Shaft Chain Tensioner provides a direct replacement for the factory component, making it an excellent choice for routine engine repairs, oil pump servicing, and complete K-Series engine rebuilds.

Whether you're maintaining a daily-driven Civic Si, rebuilding a K20Z3 engine, or refreshing the factory oil pump assembly during a performance build, genuine Honda components help preserve the reliability and precision of the original engine design.

Features

• Genuine Honda OEM Component: Manufactured to Honda's original equipment specifications for dependable fitment and operation.

• Factory Balancer Shaft Chain Tensioner: Designed to maintain proper tension on the engine's balancer shaft drive chain.

• Direct OEM Replacement: Replaces the original tensioner on compatible Honda K20Z3 engine applications.

• Maintains Proper Chain Engagement: Helps prevent excessive slack within the balancer shaft drive system.

• Supports Smooth Engine Operation: Contributes to reliable operation of the engine's vibration-reducing balance shaft assembly.

• Helps Reduce Unwanted Chain Noise: Proper chain tension can help prevent rattling associated with excessive chain movement.

• Durable Factory Construction: Designed to withstand the operating conditions inside the engine.

• Precision Engineered: Manufactured for proper alignment with the factory chain and related components.

• Ideal for Engine Rebuilds: Suitable for replacing worn components during complete K20Z3 engine assembly.

• Oil Pump Service Component: Located within the engine's oil pump and balancer shaft drive assembly.

• Factory Performance Compatibility: Maintains the original chain tensioning configuration used in the Civic Si.

• OEM Reliability: An excellent choice for owners who prefer genuine Honda replacement engine components.

Additional Information

• Manufacturer: Honda Motor Co., Ltd.
• Brand: Genuine Honda OEM
• Honda Part Number: 13450-RBC-004
• OEM Description: Tensioner, Balancer Shaft Chain
• Alternative Names: Balancer Chain Tensioner, Balance Shaft Chain Tensioner, Oil Pump Chain Tensioner, Balancer Shaft Drive Tensioner
• Product Category: Engine Components / Balancer Shaft System
• Installation Location: Engine Oil Pump and Balancer Shaft Drive Assembly
• Primary Engine Application: Honda K20Z3
• Primary Vehicle Application: 2006–2011 Honda Civic Si
• Chassis Compatibility: FG2 Coupe / FA5 Sedan
• Component Function: Maintains proper tension on the balancer shaft drive chain.
• Related OEM Chain: Honda 13441-PNA-004 – Balancer Shaft Chain
• Related OEM Chain Guide: Honda 13460-PNA-004 – Balancer Shaft Chain Guide
• Installation Type: Direct OEM Replacement
• Condition: New
• Quantity: One Balancer Shaft Chain Tensioner

Additional Notes: The balancer shaft chain tensioner is separate from the engine's primary camshaft timing chain tensioner. Verify the correct component before ordering.

Common Reasons for Replacement

• Excessive Balancer Shaft Chain Slack: A worn or malfunctioning tensioner may no longer maintain the proper chain tension.

• Abnormal Engine Noise: Rattling or other mechanical noise from the balancer shaft drive system may indicate worn components.

• Tensioner Wear: Internal wear or damage can compromise the tensioner's ability to control chain movement.

• Balancer Shaft Chain Replacement: Installing a new tensioner during chain service helps restore proper operation of the drive assembly.

• Oil Pump Assembly Repairs: Replacement may be necessary when servicing or rebuilding the factory oil pump and balancer shaft assembly.

• Engine Rebuilds: A new tensioner is worth considering during a complete K20Z3 engine rebuild, particularly when the original component shows signs of wear.

• Damaged Chain Guide Components: A failed or worn chain guide may warrant inspection of the tensioner and related components.

• High-Mileage Engine Maintenance: Inspection and replacement of worn balancer shaft components can help maintain long-term engine reliability.

• Preventative Engine Service: Replacing questionable tensioning components during major engine repairs can help avoid repeated disassembly.

Installation Notes

1. Verify Engine Compatibility: Confirm that Honda part number 13450-RBC-004 is correct for your K20Z3 engine or compatible oil pump assembly.

2. Prepare the Vehicle: Disconnect the negative battery terminal and safely support the vehicle if underbody access is required.

3. Drain the Engine Oil: Drain the engine oil before beginning any work requiring oil pan removal.

4. Access the Balancer Shaft Assembly: Remove the necessary components to access the oil pump and balancer shaft chain drive system according to the Honda service manual.

5. Inspect the Existing Chain Drive: Check the balancer shaft chain, sprockets, guides, and existing tensioner for abnormal wear or damage.

6. Verify Chain and Shaft Alignment: Follow Honda's specified procedures for maintaining the correct balancer shaft positioning and chain installation alignment.

7. Remove the Original Tensioner: Carefully remove the existing tensioner while controlling chain movement and following the factory service procedure.

8. Inspect the Mounting Area: Verify that the tensioner mounting surfaces and associated hardware are clean and undamaged.

9. Install the New Tensioner: Position the Genuine Honda 13450-RBC-004 tensioner and install it using the factory mounting arrangement.

10. Follow the Factory Tensioning Procedure: Set or release the tensioner as directed in the applicable Honda service manual. Do not force the tensioner or improvise the chain tensioning procedure.

11. Verify Chain Engagement: Confirm that the balancer shaft chain is properly seated on the sprockets and that the guides and tensioner are correctly positioned.

12. Rotate the Engine by Hand: Where specified by the service manual, carefully rotate the crankshaft by hand and verify correct operation before reassembly.

13. Reassemble the Engine: Reinstall the removed components using the appropriate gaskets, sealants, and factory torque specifications.

14. Refill the Engine Oil: Fill the engine with the correct oil type and quantity.

15. Perform a Final Inspection: Start the engine according to the service procedure and inspect for abnormal noises, leaks, or other indications of improper installation.

Installation Recommendation: Balancer shaft chain service requires careful attention to component alignment and factory installation procedures. Incorrect installation can cause engine damage. Professional installation is recommended for individuals unfamiliar with K-Series engine internal components.

What's Included

• (1) Genuine Honda Balancer Shaft Chain Tensioner – Part Number 13450-RBC-004

Note: The balancer shaft chain, chain guides, sprockets, mounting hardware, oil pump assembly, gaskets, and additional engine components are not included unless otherwise specified.

The Genuine Honda Balancer Shaft Chain Tensioner (13450-RBC-004) is an essential replacement component for maintaining proper balancer shaft chain tension in the 2006–2011 Honda Civic Si K20Z3 engine.

Manufactured to Honda's original factory specifications, this tensioner helps maintain consistent chain engagement, supports smooth balancer shaft operation, and provides dependable performance during everyday driving and demanding engine operation.

Whether you're rebuilding a K20Z3 engine, servicing the factory oil pump assembly, replacing worn balancer shaft components, or completing a Civic Si performance project, genuine Honda replacement parts provide the precision and reliability needed for proper engine assembly.