VALVE RETAINER
https://www.dpatking.com/auto-parts/valve-retainer.html
#engine #valve #retainer
VALVE RETAINER
Valve retainer is a small but vital component in an engine's valve train system. It works with the valve spring, valve collets (keepers/cotters), and valve stem to maintain proper valve operation.
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 ... moreVALVE RETAINER
https://www.dpatking.com/auto-parts/valve-retainer.html
#engine #valve #retainer
VALVE RETAINER
Valve retainer is a small but vital component in an engine's valve train system. It works with the valve spring, valve collets (keepers/cotters), and valve stem to maintain proper valve operation.
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 Valve Retainers
Made from carbon steel or alloy steel.
Used in most OEM (stock) engines.
B. Performance/Titanium Valve 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 Valve Retainers
Grooved Valve Retainers – Have a groove to hold split collets (keepers).
Flat-Base Valve 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 valve 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 engine valve 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 engine valve 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.
