Most JE shelf pistons include double spiro locks as standard equipment. These locks are installed by spreading the lock between 1/8" and 1/4" and rotating the lock into the groove in the piston pin boss. Wire locks are installed in much the same manner but require chamfered wrist pins. Wire locks tend to spread side loads over more of the piston pin boss area and are considered to be a stronger method of holding the pin in place. Hook wire locks have a built in hook at the end gap. The purose for this style of wire lock is to prevent rotation within the lock groove itself. Tru arc locks fall between these two and can be used with the stock sharp edge wrist pins. The advantage of tru-arc locks is ease of installation and they can be re-used unlike spiro locks, however they are not recommended for medium to high horsepower applications.
Most JE shelf pistons include double spiro locks as standard equipment. These locks are installed by spreading the lock and rotating it into the piston pin boss. Wire locks are installed similarly, but require chamfered wrist pins. Wire locks tend to spread side loads over more of the piston pin boss area and are considered to be a stronger pin retention method. Hook wire locks have an integrated hook at the end gap to prevent rotation within the lock groove. Tru-arc locks fall between these to and can be used with the stock sharp edge wrist pins’ the advantage of tru-arc locks is the ease of installation and reusability (spiro locks cannot be re-used). However, tru-arc locks are only recommended for lower horsepower applications.
This JE Pistons wrist pin retainer is a precision-engineered wire lock designed to keep your piston's wrist pin securely in place under the most demanding conditions. Its rugged wire-lock design ensures a snug fit that resists movement and wear, giving engine builders and enthusiasts confidence that critical internal components stay exactly where they belong - helping protect your investment and keep your engine running smoothly.
Wrist Pin Retainer, Wire Lock, Chrome Silicon, 0.630 in. Diameter, 0.050 in. Lock Thickness, Each.
Made from high-strength chrome silicon and sized at a 0.630" diameter with a 0.050" thickness
JE Pistons Wrist Pin Retainer - 0.630 In Diameter - 0.050 In Thickness - Wire Lock
Wrist Pin Retainer, Wire Lock, 0.630 in. Dia., 0.050 in. Thickness, Each.
Engine Piston Wrist Pin Retainer
Chrome Silicon Wire Lock
Replacement Pin
