Corteco 80001427 Engine Crankshaft Pulley

Corteco 80001427 Engine Crankshaft Pulley

The Corteco 80001427 engine crankshaft pulley is a decoupled harmonic pulley built for Mercedes-Benz applications with start-stop function. With a 157 mm outer diameter, 5-rib design, and 6PK belt parameter, it supports stable accessory drive operation in the correct OE-style configuration.

Compatible With Mercedes-Benz R350, GLK350, ML350, C350, CLS350, CLK350, E350, and SLK350 applications listed below. The Corteco 80001427 is a direct-fit crankshaft pulley solution for vehicles that require a decoupled pulley design.

Key Features

• Engine crankshaft pulley for accessory drive systems
• Decoupled design for vehicles with start-stop function
• 157 mm outer diameter for specified Mercedes-Benz fitments
• 5-rib pulley profile with 6PK belt parameter
• OE-style replacement from Corteco
• Cross-reference: Gates 31783

Detailed Description

This crankshaft pulley is engineered for Mercedes-Benz engines that use a decoupled pulley arrangement. The 5-rib, 6PK configuration and 157 mm outer diameter are important for proper belt alignment and accessory drive operation. Use the Corteco 80001427 when replacing a worn or noisy crankshaft pulley on supported Mercedes-Benz models, including Mercedes-Benz C350, E350, ML350, and R350 applications.

This part cross-references Gates 31783 for the same application.

What This Part Helps Address

• Belt vibration or irregular accessory drive movement
• Noise from a worn crankshaft pulley or decoupler
• Improper belt tracking on 5-rib 6PK systems
• Loss of smooth engine accessory operation on start-stop vehicles
• Replacement needs for Mercedes-Benz harmonic pulley wear

Installation Notes and Tips

Verify the pulley matches the vehicle’s rib count, belt parameter, and outer diameter before installation. Confirm the vehicle is equipped with the start-stop function and decoupled pulley setup shown in the fitment data. Inspect the belt, tensioner, and adjacent drive components during service to help prevent repeat failures.

• Fits 2006-2013 Mercedes-Benz R350, N/A
• Fits 2009-2012 Mercedes-Benz GLK350, N/A
• Fits 2006-2012 Mercedes-Benz ML350, N/A
• Fits 2006-2011 Mercedes-Benz C350, N/A
• Fits 2007-2011 Mercedes-Benz CLS350, N/A
• Fits 2006-2009 Mercedes-Benz CLK350, N/A
• Fits 2006-2009 Mercedes-Benz E350, N/A
• Fits 2005-2008 Mercedes-Benz SLK350, N/A

Quality Assurance

Corteco supplies OE-style engine and drivetrain components built to match specified vehicle requirements. The 80001427 part number is listed with confirmed fitment data for supported Mercedes-Benz models and should be matched to the vehicle’s pulley specification before installation.