Maintain reliable engine sealing and prevent unwanted oil leaks with the Genuine Honda Timing Chain Case O-Ring (91302-PNA-004). This factory replacement sealing component is designed for the timing chain case assembly on select Honda K-Series engines, providing the precise fitment and dependable performance expected from genuine Honda OEM parts.

The timing chain case is an important component of the engine, enclosing the timing chain and associated timing components. Proper sealing is essential to maintaining oil containment and protecting the engine from leaks that can develop as factory seals age or deteriorate.

Over time, exposure to engine heat, oil, and repeated temperature changes can cause rubber sealing components to harden, flatten, or lose their original elasticity. When this occurs, the seal may no longer provide the protection needed to prevent oil seepage around the timing chain case assembly.

Manufactured to Honda's original equipment specifications, the 91302-PNA-004 O-ring is an ideal replacement when servicing the timing chain cover, performing engine maintenance, or rebuilding a K20 or K24 engine.

Whether you're maintaining a factory Honda engine or assembling a performance-oriented K-Series build, genuine Honda replacement seals help ensure proper fitment and long-term reliability.

Features

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

• Factory Timing Chain Case Seal: Designed for the designated sealing location within the timing chain case assembly.

• Helps Prevent Oil Leaks: Provides a reliable seal between mating engine components when properly installed.

• Oil-Resistant Construction: Designed to withstand exposure to engine oil and normal operating temperatures.

• Precision-Molded Design: Provides the correct dimensions and sealing profile for compatible Honda applications.

• Direct OEM Replacement: Replaces the original factory O-ring without modification.

• Heat-Resistant Performance: Engineered for the temperature fluctuations experienced during normal engine operation.

• Ideal for Engine Rebuilds: Recommended when servicing or reassembling compatible K-Series timing chain case components.

• Supports Engine Reliability: Helps maintain proper oil containment within the timing chain case assembly.

• Factory-Quality Replacement: Suitable for OEM restoration, preventative maintenance, and performance engine builds.

Additional Information

Manufacturer: Honda Motor Co., Ltd.

Brand: Genuine Honda OEM

Honda Part Number: 91302-PNA-004

Product Name: Timing Chain Case O-Ring

OEM Description: O-Ring, Chain Case

Alternative Names: Timing Cover O-Ring, Engine Timing Cover O-Ring, Timing Cover Gasket

Component Type: Engine Timing Chain Case Sealing O-Ring

Material: OEM oil-resistant elastomer; exact material compound not specified

Installation Location: Designated sealing location within the engine timing chain case assembly

Primary Engine Family: Honda K-Series

Fitment Type: Direct OEM Replacement

Condition: New

Quantity: Sold Individually

Additional Notes: This O-ring is a separate sealing component and does not replace the liquid gasket or sealant required at other timing chain cover mating surfaces.

Common Reasons for Replacement

• Engine Oil Leaks: A deteriorated timing chain case O-ring may allow oil to seep from its designated sealing location.

• Aging Rubber Seals: Prolonged exposure to heat and engine oil can cause rubber sealing components to harden or lose flexibility.

• Timing Chain Maintenance: Replacing disturbed seals is recommended when servicing the timing chain case assembly.

• Engine Rebuilds: Installing new OEM sealing components helps ensure reliable operation after engine reassembly.

• Timing Cover Removal: O-rings can become compressed, damaged, or displaced during disassembly.

• Preventative Maintenance: Replacing aged seals during major engine service can help prevent future oil leaks.

• Damaged or Flattened O-Rings: Cuts, cracks, deformation, or loss of elasticity can prevent the seal from functioning properly.

Installation Notes

1. Verify Part Compatibility: Confirm that Honda part number 91302-PNA-004 is specified for your engine and timing chain case configuration.

2. Prepare the Vehicle: Allow the engine to cool completely and disconnect the negative battery terminal before beginning service.

3. Access the Timing Chain Case: Remove the necessary engine components according to the factory Honda service manual to access the O-ring's installation location.

4. Remove the Existing O-Ring: Carefully remove the original seal without scratching or damaging the surrounding aluminum sealing surfaces.

5. Inspect the Sealing Area: Check the O-ring groove and mating components for corrosion, debris, scratches, or other damage that could compromise sealing performance.

6. Clean the Components: Remove accumulated oil, dirt, and old sealing material as required by the factory service procedure.

7. Install the New O-Ring: Position the new Honda OEM seal in its designated groove, ensuring it sits evenly without twisting, stretching, or pinching.

8. Follow Factory Lubrication Procedures: Apply lubricant only where specified by Honda's service manual. Keep surfaces requiring liquid gasket clean and prepared as directed.

9. Reassemble the Timing Chain Case: Reinstall all removed components using the correct Honda torque specifications, tightening sequence, and any required sealant.

10. Inspect for Leaks: After reassembly, verify proper engine operation and inspect the serviced area for oil leakage.

Installation Recommendation: Replace the O-ring whenever its sealing joint is disturbed during major engine service. Proper sealing surface preparation and adherence to Honda's factory procedures are essential for preventing oil leaks.

What's Included

• (1) Genuine Honda Timing Chain Case O-Ring – Part Number 91302-PNA-004

Note: This product includes one individual O-ring. Timing chain covers, timing chains, tensioners, guides, liquid gasket, and additional seals are sold separately unless otherwise specified.

The Genuine Honda Timing Chain Case O-Ring (91302-PNA-004) is an essential OEM replacement component for maintaining proper engine sealing on compatible Honda K-Series applications. Designed to provide a precise factory fit and reliable oil containment, this seal is an excellent choice for routine engine maintenance, timing chain service, and complete engine rebuilds.

Whether you're restoring a factory K20 or K24 engine, repairing an oil leak, or assembling a high-performance K-Series build, genuine Honda sealing components help provide the durability and reliability your engine deserves.