Bb Crankshaft Wiper

The Bb Crankshaft Wiper from MOROSO (MPN 25830) is a precision-engineered crankshaft scraper designed for big block Chevy engines during assembly, rebuild, or performance modifications. This trim-to-fit component serves a critical function in engine builders' and mechanics' workflows, preventing oil sludge and contaminants from accumulating along the crankshaft during startup and break-in. Whether you're restoring a classic big block or preparing a high-performance street engine, this specialized tool maintains crankshaft cleanliness and extends bearing life.

Manufactured from durable steel stock at 0.035 inches thick, the Bb Crankshaft Wiper provides optimal scraping action without binding or excessive drag on rotating components. Its trim-to-fit design allows installation in tight engine bay configurations, accommodating various block heights and crankshaft geometry variations common across big block Chevy platforms. The natural finish resists corrosion during engine assembly phases while maintaining consistent contact pressure against the crankshaft journals, effectively removing debris and micro-particles before they circulate through the lubrication system.

Professional engine builders, restoration shops, and serious enthusiasts rely on this component for big block Chevy applications, particularly in high-mileage rebuilds where contamination control directly impacts bearing durability and engine reliability. Installation occurs during initial crankshaft fitting, requiring no special tools—simply position and secure according to block configuration. At 0.85 lbs and compact dimensions (6.35 x 2.35 x 21.8 inches), the Bb Crankshaft Wiper integrates seamlessly into standard engine assembly sequences without adding significant weight or complexity.