BMW N55 Crankshaft Kit with Conrods & Bearings – N55B30

BMW N55 Crankshaft Kit with Conrods and Kolbenschmidt Bearings

We supply this BMW N55 crankshaft kit with an aftermarket crankshaft replacing OE reference 11217580483, six connecting rods and Kolbenschmidt main and big-end bearing sets. It is for bottom-end repairs on compatible BMW N55 / N55B30 3.0-litre turbocharged petrol engines.

You recieve the crankshaft, all six conrods and both bearing sets together. Confirm the complete kit specification for your engine before ordering.

Kit contents

• 1 × replacement crankshaft for BMW reference 11217580483.
• 6 × connecting rods for the six-cylinder engine.
• 1 × Kolbenschmidt main bearing set.
• 1 × Kolbenschmidt connecting-rod big-end bearing set.

Kolbenschmidt branding applies to the two bearing sets. The crankshaft and connecting rods are separately sourced aftermarket replacement components.

Pistons, piston rings, timing components, gaskets, crankshaft seals and additional installation hardware are not included unless specified. Order any other parts needed for the rebuild seperately.

Crankshaft identification

• BMW OE reference: 11217580483.
• Spaced format: 11 21 7 580 483.
• Short reference: 7580483.
• Engine family: N55 / N55B30.

BMW also used 11217602972 in selected N55 applications. This listing supplies a replacement for 11217580483. If your egnine requires 11217602972 then obtain compatibility confirmation before ordering this kit.

BMW application guide

The models below include applications of crankshaft reference 11217580483 when fitted with the appropriate N55 engine. The table identifies the crankshaft application. Complete-kit fitment also depends on the conrod and bearing specifications.

Check the engine identification and crankshaft reference before purchase. Some model badges were used with different engine families. Registration year alone does not confirm fitment and an earlier engine replacement can change which parts are required.

Repairs following crankshaft or bearing damage

This kit may be needed when inspection finds damaged crankshaft journals, a spun bearing or connecting rods with distorted big-end housings. An engine specialist should assess whether the original crankshaft can be reused or reconditioned before deciding the repair scope.

A failed big-end bearing can damage the rod as well as the crankshaft journal. New bearing shells cannot correct a distorted rod housing. This kit includes six replacement rods so they can be renewed alongside the crankshaft and bearings.

The egnine block and main bearing housings also need inspection. Replacing the rotating components alone will not correct damage to the block or an unresolved lubrication fault.

Bearing clearances and assembly checks

Professional engine assembly is required. Supplied bearings still need clearance checks against the actual crankshaft and assembled housings. The engine builder should:

• Confirm the crankshaft, connecting-rod and bearing specifications.
• Inspect and measure the main bearing housings.
• Measure the crankshaft journals and assembled main and big-end bearing oil clearances.
• Check crankshaft end float and free rotation.
• Follow the applicable tightening procedures and renew fasteners where specified.
• Identify and correct the cause of the original failure.

Clean the lubrication system after bearing failure

Bearing damage can leave metal particles in oil passages and other lubrication components. Assess the affected parts and clean or replace them as appropriate before assembly. Contamination left in the engine can damage the replacement bearings.

For a compatibility check please provide your VIN, engine identification and original crankshaft reference before ordering. BMW names and OE numbers are used for identification. The supplied crankshaft and connecting rods are aftermarket replacement parts.