Description
Product Overview
The DNJ Valve Stem Seal (model VSS903) is a premium‑grade component designed specifically for the 1.5L L4 SOHC engines found in 1987‑1994 Toyota Tercel models (engine codes 3E and 3EE). Constructed from high‑temperature Viton, the seal offers exceptional resistance to oil degradation, heat, and chemical exposure, ensuring a long service life even under demanding conditions. Each seal measures 3 x 3 x 3 inches and weighs approximately 1 pound, reflecting a compact yet robust design. The part is manufactured by DNJ Engine Components, a company with over 30 years of experience supplying domestic and Japanese engine parts, and it carries the ASIN B00SQTI6ZI for easy reference.
Usage

This valve stem seal is intended for complete engine rebuilds, major overhauls, or targeted valve train repairs. It fits naturally into the valve guide, providing a tight seal that prevents oil from leaking into the combustion chamber while maintaining proper lubrication of the valve stem. Ideal for professional mechanics, automotive shops, and knowledgeable DIYers, the seal supports both performance and emissions compliance. Whether you are restoring a classic Tercel or maintaining a daily driver, the DNJ Viton seal delivers consistent results in a variety of operating environments, from city commuting to high‑temperature highway cruising.
Why Choose Us
Choosing the DNJ Valve Stem Seal means selecting a product backed by a proven track record of quality and reliability. DNJ Engine Components sources only the highest‑grade Viton compounds, rigorously testing each batch for dimensional accuracy and material integrity. The seal meets or exceeds OEM specifications, offering a direct replacement that eliminates the guesswork of aftermarket alternatives. Our commitment to customer satisfaction is reflected in a 4.5‑star rating from verified buyers, and the part consistently ranks within the top 200 in the Automotive Replacement Engine Valve Seals category on major retail platforms.
Key Features
- Premium Viton material provides superior heat and oil resistance.
- Exact OEM dimensions ensure a perfect fit for 3E and 3EE engines.
- Designed for both professional rebuilds and DIY maintenance projects.
- Reduces oil consumption and prevents combustion chamber contamination.
- Backed by DNJ’s 30+ years of engineering expertise and a strong customer rating.
FAQ
Is this seal compatible with other Toyota engine models?
The VSS903 seal is specifically engineered for 87‑94 Toyota Tercel models with 3E or 3EE engine codes. While it may physically fit similar valve stems, we recommend using the exact part number for optimal performance and warranty compliance.
Can I install the seal myself, or do I need a professional?
Installation requires basic engine disassembly skills, including removal of the valve cover and careful handling of the valve train components. If you are comfortable with standard engine work, the seal can be installed with common hand tools. For best results, follow the service manual’s torque specifications and cleaning procedures.
What maintenance is required after installing the seal?
After installation, monitor oil levels and check for any signs of leakage during the first few operating cycles. Regular oil changes using the manufacturer‑specified oil grade will help maintain the Viton’s sealing properties and extend the component’s lifespan.
How does Viton compare to other seal materials?
Viton offers superior resistance to high temperatures, oil, and fuel compared to standard nitrile or silicone compounds. This makes it especially suitable for engines that run hot or are subjected to aggressive driving conditions.
What is the warranty on this valve stem seal?
DNJ Engine Components provides a limited one‑year warranty against manufacturing defects. The warranty does not cover damage caused by improper installation, misuse, or external factors.






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