Perfect Circle MS617P Main Bearing Set for Chevy Inline-6 Engines Standard Size

The Perfect Circle MS617P is a precision-engineered main bearing set designed for Chevrolet and GMC inline-6 cylinder engines. This complete bearing set provides reliable crankshaft support for 194, 215, 230, 250, and 292 cubic inch engines produced from 1963 to 1989.

Key Features:

• Tri-Metal 77 (TM-77) construction combines copper-lead alloy layer with steel backing and electroplated babbitt surface for superior durability and wear resistance
• Standard size bearings for stock crankshaft journals
• Complete set includes seven bearings: MB-3135P (positions 1-6) and MB-2588P(F) (position 7 thrust bearing)
• 1/2 groove design for optimal oil distribution
• Precision manufactured to OEM specifications

Specifications:

• Standard shaft diameter: 2.2983-2.2993 inches
• Bearing outer diameter/housing bore: 2.4906-2.4916 inches
• Vertical oil clearance: 0.0003-0.0033 inches (positions 1-6), 0.0006-0.0036 inches (position 7)
• Maximum wall thickness: 0.0955 inches
• Bearing length: 0.8070 inches (positions 1-6), 1.0090 inches (position 7 thrust bearing)

This P-Series bearing set delivers OEM-quality performance for engine rebuilds and restorations. The advanced tri-metal construction ensures excellent load-carrying capacity, reduced friction, and extended service life under demanding operating conditions.