Crankshaft Main Bearing Set for Subaru Boxer Engines ️

This precision bearing set supports the crankshaft, keeps it running true, and maintains correct oil clearance. It carries heavy combustion loads, stabilizes the bottom end, and reduces noise. Install during an engine rebuild, after oil starvation, overheating, metal-on-metal sounds, or when oil pressure is low. Perfect fit for Subaru flat engines .

How it works ⚙️

Matched shells form a round journal around the crank. With pressurized oil, they create a hydrodynamic film so the crank rides on oil, not metal. Grooved upper shells feed oil to the rods, while tri-metal layers handle heat, load, and embed small debris. Tangs and oil holes align with the block for secure location and steady lubrication.

What if worn or damaged ❗

Excess clearance drops oil pressure, causes hot idle knock, start-up rattle, and copper-colored glitter in the sump. Scoring can spin a bearing, seize the crank, bend/break rods, and destroy the block. Watch for flickering oil light, harsh vibration, and metallic knock.

Pro tips : measure journals, choose correct grade, verify clearance with Plastigage, torque caps in sequence, use assembly lube, and keep parts surgically clean.

Compatibility

• Legacy
• Tribeca