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Product Details
The Honda OEM K-Series Front Crankshaft Oil Seal is a genuine factory replacement designed to prevent engine oil leaks around the front of the crankshaft. Manufactured to Honda's original equipment specifications, this precision-engineered oil seal measures 43mm x 58mm x 7mm and provides dependable sealing performance in compatible Honda K20 and K24 engine applications.
Also known as a front main seal, crankshaft pulley seal, or timing chain cover oil seal, this genuine Honda component helps retain engine oil while allowing the crankshaft to rotate smoothly.
Commonly used in vehicles such as the 2002–2005 Honda Civic Si, 2003–2005 Honda Accord, 2002–2005 Honda CR-V, and 2003–2005 Honda Element, this OEM front crankshaft seal is an excellent replacement for worn, hardened, or leaking factory seals.
The front crankshaft oil seal is located in the timing chain cover behind the crankshaft pulley. It creates an oil-tight barrier around the rotating crankshaft, helping prevent engine oil from escaping onto the crankshaft pulley, timing cover, and surrounding engine components.
Over time, crankshaft oil seals can deteriorate due to engine heat, age, high mileage, excessive crankcase pressure, or wear around the sealing surface. A damaged seal may allow oil to accumulate around the lower timing cover or drip onto nearby components.
Whether you're repairing an engine oil leak, replacing a timing chain, rebuilding a K20/K24 engine, or preparing a K-Series engine swap, this genuine Honda OEM Front Crankshaft Oil Seal provides factory-correct dimensions and dependable sealing performance.
Features
- Genuine Honda OEM Part: Authentic factory replacement manufactured to Honda's original equipment specifications.
- Front Crankshaft Oil Seal: Designed to prevent engine oil leaks around the front crankshaft opening.
- 43mm Inner Diameter: Factory-specified crankshaft sealing diameter.
- 58mm Outer Diameter: Designed to fit the corresponding timing chain cover opening.
- 7mm Width: Maintains the original factory seal dimensions.
- ARAI Oil Seal: Honda's OEM parts catalog identifies this component as an ARAI-manufactured oil seal.
- Direct OEM Replacement: Replaces the original seal where Honda specifies part number 91212-PNC-004.
- Factory-Correct Fit: Maintains the original front crankshaft sealing configuration.
- Helps Prevent Engine Oil Leaks: Reduces oil seepage around the crankshaft pulley and timing chain cover.
- Rotating Shaft Seal Design: Maintains a fluid barrier around the rotating crankshaft.
- Ideal for Timing Chain Service: Convenient to replace when the crankshaft pulley is already removed.
- Engine Rebuild Friendly: Excellent for K20 and K24 engine maintenance, rebuilding, and restoration.
- Performance Build Friendly: Suitable for compatible naturally aspirated, turbocharged, and supercharged K-Series engines.
- Sold Individually: Includes one genuine Honda front crankshaft oil seal.
- OEM Part Number: 91212-PNC-004.
Additional Information
- Manufacturer: Honda / Acura
- Part Number: 91212-PNC-004
- OEM Description: Oil Seal (43x58x7) (ARAI)
- Other Names: Front Crankshaft Seal / Front Main Seal / Crankshaft Pulley Oil Seal / Timing Chain Cover Seal / Front Cover Oil Seal
- Product Type: Engine Oil Seal
- Installation Location: Front Crankshaft / Timing Chain Cover
- Inner Diameter: 43mm
- Outer Diameter: 58mm
- Width: 7mm
- OEM Manufacturer Designation: ARAI
- Quantity: Sold Individually (1 Seal)
Common Reasons for Replacement
Front crankshaft oil seals should be inspected whenever the crankshaft pulley is removed or the timing chain cover is serviced.
- Engine oil leaking around the crankshaft pulley
- Oil accumulation on the lower timing chain cover
- Oil residue around the front of the engine
- Hardened or deteriorated sealing material
- Cracked, torn, or damaged sealing lip
- Excessive wear of the crankshaft sealing surface
- High-mileage engine maintenance
- Timing chain replacement
- Timing chain cover removal
- Crankshaft pulley replacement
- K20 or K24 engine rebuilding
- K-Series engine swap preparation
- Repairing persistent front engine oil leaks
- Replacing a worn front crankshaft seal helps maintain proper engine oil retention and prevents unnecessary oil accumulation around the front of the engine.
Installation Notes
- Proper installation is essential for preventing engine oil leaks and ensuring dependable crankshaft sealing performance.
- Allow the engine to cool and safely support the vehicle according to the Honda factory service manual.
- Remove the necessary accessory drive components to access the crankshaft pulley.
- Secure the crankshaft using the appropriate Honda crankshaft pulley holding tool.
- Remove the crankshaft pulley and inspect the surrounding timing chain cover for oil leakage.
- Carefully remove the original front crankshaft oil seal without damaging the timing cover or crankshaft sealing surface.
- Clean the seal bore and inspect the crankshaft sealing surface for scratches, grooves, corrosion, or excessive wear.
- Prepare the new Honda OEM oil seal according to the factory service manual, including the specified lubrication or installation requirements.
- Using a suitable seal driver, carefully install the new seal squarely into the timing chain cover.
- Install the seal to the factory-specified depth and orientation.
- Reinstall the crankshaft pulley and related components according to the Honda factory service procedure.
- Tighten all fasteners to the correct factory specifications.
- Start the engine and inspect the front crankshaft area for oil leaks.
- Important: Avoid striking the seal directly with metal tools or applying uneven pressure during installation. Improper installation can damage the sealing lip, distort the seal, or cause premature oil leakage.
- Inspect the crankshaft pulley sealing surface and verify that excessive crankcase pressure is not contributing to repeated seal failures.
- When servicing the timing chain or rebuilding a K-Series engine, inspect related timing cover gaskets, seals, and components for wear.
Note:
- Includes one genuine Honda OEM Front Crankshaft Oil Seal (43x58x7mm). Crankshaft pulleys, timing chain covers, timing components, gaskets, and installation tools are sold separately unless otherwise specified.
For Honda enthusiasts repairing front crankshaft oil leaks, rebuilding a K20/K24 engine, restoring a factory drivetrain, or preparing a performance K-Series build, this genuine Honda OEM Front Crankshaft Oil Seal delivers factory-correct dimensions and dependable sealing performance.
| Part Number: | 91212-PNC-004 |
| Brand: | Honda |
| Location: | Front |
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 2002 | Acura | RSX | Base |
| 2002 | Acura | RSX | Type-S |
| 2002 | Honda | CR-V | EX |
| 2002 | Honda | CR-V | LX |
| 2002 | Honda | Civic | Si |
| 2003 | Acura | RSX | Base |
| 2003 | Acura | RSX | Type-S |
| 2003 | Honda | Accord | DX |
| 2003 | Honda | Accord | EX |
| 2003 | Honda | Accord | LX |
| 2003 | Honda | CR-V | EX |
| 2003 | Honda | CR-V | LX |
| 2003 | Honda | Civic | Si |
| 2003 | Honda | Element | DX |
| 2003 | Honda | Element | EX |
| 2004 | Acura | RSX | Base |
| 2004 | Acura | RSX | Type-S |
| 2004 | Acura | TSX | Base |
| 2004 | Honda | Accord | DX |
| 2004 | Honda | Accord | EX |
| 2004 | Honda | Accord | LX |
| 2004 | Honda | CR-V | EX |
| 2004 | Honda | CR-V | LX |
| 2004 | Honda | Civic | Si |
| 2004 | Honda | Element | DX |
| 2004 | Honda | Element | EX |
| 2004 | Honda | Element | LX |
| 2005 | Acura | RSX | Base |
| 2005 | Acura | RSX | Type-S |
| 2005 | Acura | TSX | Base |
| 2005 | Honda | Accord | DX |
| 2005 | Honda | Accord | EX |
| 2005 | Honda | Accord | LX |
| 2005 | Honda | Accord | SE |
| 2005 | Honda | CR-V | EX |
| 2005 | Honda | CR-V | LX |
| 2005 | Honda | Civic | Si |
| 2005 | Honda | Element | EX |
| 2005 | Honda | Element | LX |
| 2006 | Acura | RSX | Base |
| 2006 | Acura | RSX | Type-S |
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