BCBC 3-4202S Engine Balance Shaft Chain Kit

Engine Balance Shaft Chain Kit Overview

This Melling engine balance shaft chain kit is built for balance shaft timing rebuilds that require a standard replacement chain and sprocket set. It is a fitment-based solution for a wide range of GM and Saab applications, including Chevrolet Malibu, Chevrolet Equinox, and Saturn Vue models.

Key Features

• Silent roller timing chain design for balance shaft drive applications.
• Hardened steel crankshaft sprocket for durable gear engagement.
• Standard replacement grade for service work and rebuilds.
• Chain dimensions and tooth counts matched to the listed application.
• Melling part number 3-4202S for catalog and service identification.

Detailed Description

Melling 3-4202S is an engine balance shaft chain kit intended for timing service where the balance shaft drive components need to be renewed together. The kit uses a silent roller chain and hardened steel sprocket construction, with a 21-tooth crankshaft sprocket and 42-tooth driven sprocket. It is listed across multiple Buick, Chevrolet, GMC, Pontiac, Saturn, Saab, and Oldsmobile applications, including Chevrolet Malibu, Chevrolet Equinox, and Saturn Vue fitments. For some applications, the S911 water pump drive sprocket must be ordered separately as noted in the fitment data.

Melling positions this kit within its Stock line as a standard replacement option for timing service. The part number 3-4202S is also cross-referenced to Monroe Shocks & Struts 172286 and 182286 for the same application.

What It Is Used For

• Worn or stretched balance shaft timing chain replacement.
• Timing noise caused by chain wear or sprocket wear.
• Service rebuilds that require matched timing components.
• Restoring proper balance shaft drive operation after teardown.
• Replacing damaged chain and sprocket components during engine repair.

Installation Notes and Tips

Verify the exact year, make, and model before ordering, since fitment varies by application. Review the fitment notes carefully; several listings specify that the S911 water pump drive sprocket is ordered separately as needed, and one application notes that the water pump drive sprocket is not included. Confirm sprocket count and chain type against the original components during disassembly. Professional installation is recommended for timing-related engine service.

Quality Assurance

Melling states that its chains and sprockets are manufactured with quality materials and workmanship, and that the brand offers coverage across standard, heavy-duty, and performance timing service levels. Part number 3-4202S is built as a standard replacement kit for listed applications.