BCBC MRDS-940 Engine Rocker Arm Stud

Engine rocker arm stud overview

This Melling engine rocker arm stud is a standard replacement part made in the USA for rebuild work and valve train service. Part number MRDS-940 is built from alloyed steel and is specified for stock applications across a wide range of Ford engines and chassis.

Key features

• Alloyed steel construction for engine hardware durability.
• Standard replacement grade for rebuild and service use.
• Made in the USA.
• Designed to replace worn, stretched, or damaged rocker arm studs.
• Supports proper valve train adjustment during engine assembly.

Detailed description

Melling MRDS-940 is an engine rocker arm stud intended for rebuilders and technicians replacing original hardware during engine service. The manufacturer recommends installing new rocker arm studs during every rebuild because old studs can stretch, wear threads, or fail from metal fatigue. Replacing the stud also reduces the risk of cracking the cylinder head during removal of aged hardware. This part number MRDS-940 is a direct-fit style stock replacement for many Ford applications, including classic passenger cars and trucks such as the Ford Mustang, Ford Torino, and Ford F-150.

The alloyed steel construction and standard replacement grade make this stud a practical choice when restoring valve train geometry and maintaining correct adjustment. Compatible With Ford Mustang, Ford Torino, and Ford F-150 applications listed in the fitment data, MRDS-940 is also cross-referenced to Monroe Shocks & Struts 42-2940 and MR1867RS for the same application.

What it is used for

• Replacing worn rocker arm studs during an engine rebuild.
• Correcting damaged or stretched stud threads.
• Restoring secure valve train adjustment.
• Addressing hardware fatigue found during teardown.
• Reducing the chance of head damage from removing old studs.

Installation notes and tips

Install MRDS-940 during engine rebuild or cylinder head service, following the factory torque and adjustment procedures for the application. Inspect the head threads and surrounding material before installation, and replace any hardware that shows wear, stretching, or cracking. Confirm fitment against the exact Ford engine and chassis combination before assembly.

Quality assurance

Melling specifies this rocker arm stud as a high-standard replacement part and notes that it is manufactured in the USA. The brand recommends new rocker arm studs whenever an engine is rebuilt to help ensure proper installation and valve train adjustment.