Description

This engine thrust washer (standard size) is a precision-machined replacement component designed for heavy-duty diesel engines requiring OEM part numbers 3901170 and 3901172 . The thrust washer plays a critical role in controlling crankshaft end play , ensuring proper axial movement and preventing excessive forward or backward crankshaft motion. Manufactured from high-strength, wear-resistant bearing materials , this standard-size thrust washer is engineered to withstand high axial loads, constant rotation, and extreme diesel operating temperatures. Proper thrust washer function helps protect the crankshaft, bearings, and engine block from premature wear and costly internal damage. This STD thrust washer (1 piece) is ideal for engine rebuilds, overhauls, and preventive maintenance , especially when restoring factory crankshaft clearances without machining. It ensures smooth crankshaft operation, stable oil film retention, and long-term engine reliability. Key Benefits: Standard-size thrust washer for OEM fitment OEM replacement for 3901170 / 3901172 Controls crankshaft end play and axial movement Reduces internal wear and thrust surface damage Maintains proper oil clearance and lubrication Suitable for heavy-duty diesel engine rebuilds