The Valve Cover Oil Seal (Rocker Cover Grommet) with OEM number 13276-BN801 (also listed as 13276BN801) is a verified OEM-grade direct replacement for a wide range of Nissan vehicles equipped with YD22DDT and YD25DDTi diesel engines. This critical rubber seal, also known as a spark plug tube seal or well seal, is installed in the cylinder head cover to prevent engine oil from leaking into the spark plug wells and to keep contaminants out, ensuring reliable ignition system performance.

If your valve cover oil seal is failing, you may experience one or more of the following symptoms:

• Oil in Spark Plug Wells: Engine oil pooling around the spark plugs
• Engine Misfire: Rough running or misfiring, especially under load
• Burning Oil Smell: Oil leaking onto hot exhaust components
• Check Engine Light: Illumination with diagnostic trouble codes

Pre-Installation Checklist:

• Allow the engine to cool completely before starting work
• Quantity Required: 4 seals per engine
• Clean the area around the valve cover to prevent contamination
• Inspect the valve cover for cracks or warpage
• CRITICAL: This seal is installed in the cylinder head cover (valve cover)

Installation Guidelines (Reference Nissan workshop manual):

1. Disconnect the negative battery terminal
2. Remove the engine cover and blocking components
3. Remove the valve cover mounting bolts in correct sequence
4. Carefully remove the valve cover
5. Remove the old seals from the valve cover
6. Clean all surfaces thoroughly with appropriate solvent
7. Ensure surfaces are completely dry and oil-free
8. CRITICAL: Install new seals, ensuring correct seating
9. Install valve cover and hand-tighten mounting bolts
10. CRITICAL: Torque bolts in correct sequence to manufacturer's specifications
11. Reconnect the negative battery terminal
12. Start engine and check for oil leaks
13. Check oil level after engine reaches operating temperature

Maintenance Schedule:

• Inspection: Every 50,000 km / 12 months, or during routine oil changes
• Replacement: Immediately if oil leaks are detected or seals show deterioration
• This seal must be replaced whenever the valve cover is removed

• Packaging: Each seal securely packed in protective packaging
• Pack Options: Sold individually or as a pack of 4
• Suitable for: Wholesale distributors, auto parts retailers, and repair shops