What is the purpose of piston pin locks?

Piston pin locks, also known as retaining clips or circlips, are small but essential components that secure the wrist pin within the piston. This prevents the wrist pin from backing out and causing catastrophic engine damage.

How do I know if I need 19mm pin locks?

You need to measure the diameter of your wrist pin. These locks are designed for wrist pins that are exactly 19.00 mm in diameter. Always confirm your pin size before ordering.

Can I reuse my old piston pin locks?

It is strongly recommended to always use new piston pin locks during an engine rebuild. Old clips can become fatigued or deformed, reducing their ability to hold the wrist pin securely, which could lead to engine failure.

Wiseco Piston Pin Locks CW19 - Engine Components

Name: Wiseco 19mm Round Wire Pin Locks (Pair) Retaining Clip Shelf Stock
Brand: Wiseco
Price: 2.62 USD
Availability: InStock

Wiseco 19mm Round Wire Pin Locks (Pair) Retaining Clip Shelf Stock

$2.62

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wiseco 19mm round wire piston pin locks (pair). Retains your wrist pin securely for engine rebuilds.

Key Features

Fits 28+ vehicle make/model combinations.
Made from strong, round wire for secure retention.
Designed for 19.00 mm wrist pins.
Helps keep piston and wrist pin assembly secure.
A common accessory for engine rebuilds.
Sold as a pair for one piston.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

These Wiseco round wire piston pin locks are made from 19mm wire, designed to keep your wrist pin securely in place within the piston. When you're rebuilding an engine, especially one that's going to see hard use, making sure the piston and connecting rod assembly stays together is critical. These clips are a straightforward way to ensure that connection remains solid.

Wiseco makes these clips from a strong, round wire that fits snugly into the grooves on your piston and around the wrist pin. They are a common choice for many performance engine builds, offering a reliable way to retain the pin without needing specialized tools beyond what you'd typically use for engine assembly. They are designed for a direct fit into the piston grooves, making installation a simple step in your rebuild process.

This pair of clips is intended for a single piston. If you're working on a multi-cylinder engine, be sure to order enough for all the pistons you'll be servicing. They are a small but vital part of keeping your engine components aligned and functioning correctly.