Valve Retainer

Function of Valve Retainers

• Holds the Valve Spring in Place – The retainer sits on top of the valve spring and is secured by the collets (keepers).

• Transfers Spring Force to the Valve – Ensures the valve closes properly after opening.

• Maintains Valve Train Stability – Prevents valve float at high RPMs (critical in performance engines).

Types of Valve Retainers

A. Standard Retainers

• Made from carbon steel or alloy steel.

• Used in most OEM (stock) engines.

B. Performance/Titanium Retainers

• Lighter weight (reduces valve train mass, allowing higher RPMs).

• Made from titanium or aluminum alloys.

• Common in race engines, turbocharged, or high-revving applications.

C. Grooved vs. Flat-Base Retainers

• Grooved Retainers – Have a groove to hold split collets (keepers).

• Flat-Base Retainers – Used with tulip-style collets (common in some performance setups).

Common Valve Retainer Issues

• Cracking or Fatigue – Due to metal stress over time.
  

• Worn Grooves – Can cause collets to loosen, leading to valve drop (catastrophic engine failure).
  

• Corrosion – Exposure to heat and oil breakdown can weaken retainers.
  

• Improper Installation – If not seated correctly, it can cause valve train failure.

Valve Retainer Replacement Tips

• Use a Valve Spring Compressor – Essential for safe removal/installation.
  

• Match Retainer to Valve & Collet Type – OEM or performance specs must align.
  

• Inspect for Wear – Check for cracks, grooves, or deformation.
  

• Consider Upgrading – For high-performance builds, titanium retainers reduce weight and improve reliability.

When to Replace Valve Retainers?

• During a valve job or head rebuild.

• If upgrading valve springs or camshafts.

• If engine has valve train noise or failure symptoms.