Crankshaft Main Bearing Set for Subaru Engines ️

Keep your flat engine smooth and quiet with this precision crankshaft main bearing set. These shells support the crank, hold exact oil clearance, and cut friction, so the engine builds pressure fast and runs stable under load. Ideal for rebuilds, fixes for low oil pressure, or repairs after knock. ⚙️

Why this part is needed

The bearings center the crankshaft in the block, carry combustion loads, and create a controlled oil film. Fresh bearings restore correct clearance, protect journals, and extend engine life after high mileage or overheating.

How it works

Two half-shells sit in the main saddles and caps. Pressurized oil flows through grooves and holes, forming a hydrodynamic film that the crank rides on—metal never touches metal when clearances are right. A thrust pair controls end play. The crush fit locks each shell so it cannot spin.

If worn or broken ❗

Warning signs: low oil pressure at hot idle, dull knock under load, glitter in oil, high oil temps. Ignoring it risks spun bearings, scored journals, rod damage, and full engine seizure. Stop driving and rebuild before catastrophic failure.

Tech tips

Measure journals, choose correct size (STD/oversize),check clearance with Plastigage, lubricate on install, and torque caps in sequence.

Compatibility

• Legacy
• Tribeca