Details

• Brand:

  

  

• SKU:

  ER3Z-6513-B

• Other Names:

  Valve Springs, Spring Valve

• Description:

  This is the genuine Ford engine valve spring, cataloged as an Engine Valve Spring, the coil spring that closes each intake and exhaust valve and controls valve motion in the three-valve modular V8 and V10 engines, keeping the valve seated against combustion pressure and following the cam profile at high engine speed. Correct spring pressure prevents valve float, seals the combustion chamber, and protects the valvetrain, while a weak, cracked, or fatigued spring causes a ticking or clatter, misfire, rough idle, loss of power at higher RPM, and in severe cases valve-to-piston contact. This valve spring serves the three-valve 4.6L, 5.4L, and 6.8L modular engine family used across a broad range of Ford and Lincoln trucks and vehicles, including F-150, F-250 F-350 Super Duty, Expedition, and Mark LT, built roughly from the mid-2000s through the 2010s, making it a common valvetrain service and rebuild item. It seals each valve as the cam releases it and returns it to its seat. It is a direct factory replacement that restores the original closing pressure. Use a proper valve spring compressor, keep components organized by position, and confirm the free length and installed pressure match the original before fitting so valve timing and sealing stay correct.

• Applications: 4.6L SOHC. 4.6L 3-VALVE V8. 6.8L - 1999-07 SUPER DUTY. 5.4L - 1999-07 SUPER DUTY. F150 NEW STYLE 2004-08, MARK LT (4.6L, 5.4L).
• Replaces:

  3l3z6513aa, 3l3z6513aaa, 3l3z6513ba, 3l3z6513ha, 4r3z6513ba, er3z6513a

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