Introduction
This manual provides detailed instructions for the installation and proper use of the FEL-PRO OS 34300 C Oil Pan Gasket Set. Fel-Pro gaskets are engineered to provide reliable vehicle sealing with application-specific materials, ensuring performance and durability.
Product Compatibility
The FEL-PRO OS 34300 C Oil Pan Gasket Set is compatible with a wide range of vehicles. Please verify your vehicle's make, model, and year against the following list to ensure proper fitment:
- 1987-1988 Oldsmobile Firenza
- 1987-1989 Buick Skyhawk
- 1987-1991 Pontiac Tempest
- 1987-1996 Chevrolet Beretta
- 1987-1996 Chevrolet Corsica
- 1987-2002 Chevrolet Cavalier
- 1993 Chevrolet Lumina
- 1993-1996 Buick Century
- 1993-1996 Oldsmobile Cutlass Ciera
- 1994-1995 Chevrolet LLV
- 1994-2003 Chevrolet S10
- 1994-2003 GMC Sonoma
- 1995-2002 Pontiac Sunfire
- 1996-2000 Isuzu Hombre
Setup and Installation
Proper installation is crucial for the longevity and effectiveness of your oil pan gasket. This set includes all necessary components for the repair, unless otherwise specified.

Image: The complete Fel-Pro OS 34300 C Oil Pan Gasket Set, including the main gasket, smaller gaskets, and a tube of RTV sealant.
Key Installation Considerations:
- Surface Preparation: Ensure all mating surfaces on the engine block and oil pan are thoroughly cleaned and free of old gasket material, oil, and debris. A clean surface is essential for a proper seal.
- Gasket Placement: Carefully position the new oil pan gasket onto the oil pan or engine block, following vehicle-specific service manual instructions.
- Fastener Torque: Tighten oil pan bolts to the manufacturer's specified torque settings. Do not overtighten, as this can damage the gasket or the oil pan, leading to leaks.
- RTV Sealant: If included or recommended by the vehicle manufacturer, apply RTV sealant sparingly in designated areas, such as corners or where multiple components meet, to enhance sealing.

Image: An oil pan gasket being carefully placed onto an engine's oil pan, illustrating the installation process.
For specific vehicle procedures, always consult your vehicle's official service manual.
Operating Principles and Superior Seal
The Fel-Pro OS 34300 C gasket is designed for optimal performance and a superior seal, even on imperfect sealing surfaces. It utilizes a proprietary cork-rubber formulation.

Image: A graphic representation highlighting the "Superior Seal" capability of the gasket, showing its conformability.
- Proprietary Cork-Rubber Formulation: This material blend provides excellent conformability, allowing the gasket to adapt to minor irregularities in the sealing surfaces.
- Engineered for Imperfect Surfaces: The gasket is specifically engineered to seal effectively in real-world repair environments where sealing surfaces may not be perfectly flat or smooth.

Image: A close-up view of an engine block surface, emphasizing the gasket's design for sealing imperfect surfaces.
Maintenance
Once installed, the oil pan gasket requires no routine maintenance. However, periodic inspection for oil leaks is recommended as part of your vehicle's general maintenance schedule. Address any signs of leakage promptly to prevent engine damage.
Troubleshooting
Oil Leaks After Installation:
- Improper Torque: Ensure all oil pan bolts are tightened to the vehicle manufacturer's specifications. Both under-tightening and over-tightening can cause leaks.
- Surface Contamination: Re-check that all sealing surfaces were clean and dry before installation. Residual oil or old gasket material can compromise the seal.
- Gasket Damage: Inspect the gasket for any tears, creases, or damage that may have occurred during installation.
- Other Leak Sources: Confirm the leak is indeed from the oil pan gasket and not from other engine components such as the rear main seal, front cover, or valve covers, which can drip down and appear as an oil pan leak.

Image: A visual representation of an oil leak on the ground, indicating a potential issue with the oil pan gasket or surrounding components.
Specifications
| Attribute | Detail |
|---|---|
| Brand | Fel-Pro |
| Model | OS 34300 C |
| Part Number | OS34300C |
| Material | Rubber, Proprietary cork-rubber formulation |
| Color | Multicolor |
| Item Weight | 4.8 ounces |
| Included Components | Oil Pan Gasket Set |
| Unit Count | 1 Count |
| GTIN / UPC | 841136412998 / 084113641299 |
Warranty and Support
Warranty Information: For details regarding the product warranty, please contact the retailer or seller from whom the product was purchased. The manufacturer, Fel-Pro, provides a warranty through its distribution channels.
Technical Support: For technical assistance or specific installation queries not covered in this manual, it is recommended to consult a certified automotive technician or refer to your vehicle's official service manual. You may also visit the Fel-Pro Store for additional product information.