COMP Cams 4758-1 Checking Spring for Valve Spring Testing

The COMP Cams 4758-1 is a lightweight checking spring designed for use during camshaft and valve train installation and setup. This specialized tool spring allows engine builders to safely rotate the crankshaft and check for proper valve-to-piston clearance, valve train geometry, and component interference without the risk of damaging valves or pistons that could occur with full-rate valve springs installed.

Key Features:

• Lightweight design provides minimal resistance during engine assembly checks
• Allows safe crankshaft rotation for clearance verification
• Prevents valve train damage during initial setup and measurement
• Essential tool for checking valve-to-piston clearance with clay or dial indicators
• Compatible with COMP Cams valve train components and most standard applications
• Provides just enough tension to keep valves closed during checking procedures

This checking spring is an essential tool for professional engine builders and serious enthusiasts who want to verify proper clearances and geometry before final assembly. Using a checking spring during the mock-up phase helps identify potential issues early, preventing costly engine damage and ensuring optimal performance.