Hi-Press Oil Pump Spring SBC (40-65 psi)

The Hi-Press Oil Pump Spring SBC (40-65 psi) from CANTON is a precision-engineered relief valve spring designed for small block Chevy engines requiring elevated oil system pressure. Built for enthusiasts and professional mechanics who demand consistent oil delivery under high-rpm and high-load conditions, this spring replaces the factory unit when upgrading to performance applications where standard pressure limits fall short. Whether you're building a street machine, drag racer, or high-output street engine, proper oil pump pressure is non-negotiable for bearing protection and longevity.

This hi-pressure spring is manufactured from hardened steel and calibrated to maintain relief pressure between 40 and 65 psi, ensuring your oil pump system stays within optimal operating windows during sustained acceleration and load cycling. The relief spring works in tandem with the oil pump's internal bypass circuit—when oil pressure exceeds the spring's calibration threshold, it opens the relief valve to prevent over-pressurization that can rupture seals, blow gaskets, or starve critical bearings of adequate flow. CANTON's OEM-grade construction ensures consistent spring rate and longevity, eliminating the variability seen in inferior aftermarket alternatives that lose tension after thermal cycling.

This spring is essential for small block Chevy owners upgrading to high-volume pumps, roller cam conversions, or turbocharged/supercharged setups where factory pressure limits create oil starvation risk. Installation requires disassembly of the oil pump housing and removal of the original relief spring—a straightforward task for experienced DIY builders or shop technicians. The compact, lightweight design (0.1 lbs) makes it easy to handle during installation, and the 7.5 x 0.5 x 8.3 inch footprint ensures seamless fitment into all standard small block Chevy pump assemblies without modification to the engine block or pan.