![Schley Tools - GM HARMONIC DAMPER HOLDER ADAS Targets 3/4″-16 [Female] SAE O-ring (Chevy](https://cdn.shopify.com/s/files/1/0724/9992/1049/files/ShopifyImagetemplate5000x5000-2025-05-10T132842.442.png?v=1778090356)
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3/4″-16 [Female] SAE O-ring (Chevy Duramax w/ Allison Transmission – 2001 & Newer)
Essential hardware for repairs
eliminating the need for drilling or permanent installation
Featuring a SureGrip drive that engages the sides of the fastener instead of the corners
Locking plier-style tool designed for a secure grip
Schley Tools - GM HARMONIC DAMPER HOLDER ADAS Targets 3/4″-16 [Female] SAE O-ring (ChevyThe 64500 GM Harmonic Damper Holding Tool is engineered to assist in the removal and installation of the crankshaft damper bolt on GM inline engines. These bolts are extremely tight and difficult to handle without the proper tool. Designed specifically for 4. 2L L6, 3. 5L L5, and 2. 8L L4 engines, this tool securely holds the damper pulley in place, allowing precise torque applicationmeeting factory specs of 110 lbs. ft. plus 180 rotation. Essential
Specialty Clamps" loading="lazy"/>
