Lisle 25840 Valve Spring Compressor for GM LS Engines

The Lisle 25840 Valve Spring Compressor is a specialized tool designed specifically for servicing GM LS engine valve springs without removing the cylinder heads. This time-saving tool allows technicians to replace valve stem seals, remove broken valve spring keepers, and service valve springs while the heads remain installed on the engine.

Key Features:

• Designed specifically for GM LS series engines
• Compresses valve springs with cylinder heads installed on engine
• Features M8 x 1.25 hex nut thread specification
• Enables valve stem seal replacement without head removal
• Durable steel construction for long service life
• Essential tool for LS engine maintenance and repair

This compressor works by threading into the spark plug hole and using compressed air to hold the valve in place while the spring is compressed, making valve service jobs significantly faster and easier. An indispensable tool for professional technicians and serious DIY enthusiasts working on LS-powered vehicles.