Engine Crankshaft – GM (12677566)

Engine Crankshaft is a rotating or reciprocating member in the valvetrain or bottom end. It is ground to a specific journal size and, in the case of a camshaft, to a specific lift and duration profile.

Replace the Engine Crankshaft when you find scoring on a journal, when the lobe or bearing surface is worn below specification, or when the engine is apart for another failure. Measure the journals before ordering, because undersize parts exist.

Ordering reference for the Engine Crankshaft is part number 12677566, categorised under Crankshafts & Bearings. Match that number against the component you are removing before you order.

This is genuine GM stock, supplied for the Engine Crankshaft with the manufacturer number intact so the reference on the box matches the catalogue.