Bearing Guard (1 Gallon)

MAHLE ORIGINAL/CLEVITE Bearing Guard assembly lubricant is a 1-gallon conventional extreme pressure engine assembly lubricant formulated specifically for protecting bearing surfaces and critical engine components during initial assembly and startup. This specialized lubricant coats internal engine surfaces with a protective film designed to prevent metal-to-metal contact and wear during the critical break-in period before conventional oil circulates throughout the engine block.

The extreme pressure (EP) formulation incorporates anti-wear additives and boundary lubrication properties that address the unique demands of engine assembly environments. Unlike standard motor oil, assembly lubricants maintain film strength under the high-stress, low-speed conditions present during hand-cranking and initial engine rotation. The conventional base stock ensures compatibility with both older and modern engine designs, making this product suitable for a wide range of engine platforms and rebuild specifications.

This product is essential for engine rebuilders, machine shops, and serious mechanics performing complete engine overhauls or performance modifications. Applying assembly lubricant to bearing surfaces, cam lobes, lifters, and other wear-critical areas before engine startup significantly reduces the risk of bearing damage and extends engine life. The 1-gallon size accommodates multiple engine builds while remaining practical for shop storage. TacticalSurplusUSA stocks this OEM-grade MAHLE lubricant for rebuilders who recognize that proper assembly preparation is foundational to reliable engine performance.