BCBC MRM-1782 Engine Rocker Arm Ball

Engine rocker arm ball for Pontiac applications

The Melling MRM-1782 is a standard replacement rocker arm ball for Pontiac valve train service. It provides the pivot surface needed for accurate rocker arm movement and stable valve train adjustment.

• Steel construction for durable valve train support.
• 0.884 in. ball diameter, also listed as 22.0 mm.
• Standard replacement grade for stock-style engine rebuilds.
• Made in the USA.

Detailed application and function

The rocker arm ball, also called the pivot or fulcrum, is a critical contact point in the valve train. When the ball is worn or damaged, friction increases and rocker motion can become inconsistent, which can accelerate wear in the engine. The MRM-1782 is intended for Pontiac engines across a wide range of classic applications, including Firebird, GTO, LeMans, and Grand Prix models. This part number, MRM-1782, is a direct service choice for stock-style rebuild work where proper rocker arm geometry matters.

What this part helps address

• Excessive friction at the rocker arm pivot.
• Erratic rocker arm movement during operation.
• Loss of accurate valve train adjustment.
• Wear concerns during engine rebuild or refresh work.
• Replacement of a damaged or worn rocker arm ball.

Installation notes and tips

Use this rocker arm ball during valve train service or engine rebuilds when replacing worn pivot components. Verify the ball diameter and replacement grade against the engine’s original specifications before installation. Fitment includes stock Pontiac applications such as Fits 1967-1979 Pontiac Firebird, N/A and Fits 1970-1973 Pontiac GTO, N/A, with additional coverage across Bonneville, Catalina, Grand Safari, Grand LeMans, Grand Prix, Laurentian, LeMans, Parisienne, Tempest, Ventura, Acadian, Beaumont, Executive, Grand Am, Grandville, and Strato-Chief. The MRM-1782 should be matched to the correct valve train setup for the engine being serviced.

Quality assurance

Melling manufactures this rocker arm ball to high material and quality standards. The MRM-1782 is a U.S.-made replacement part, and Melling recommends installing new rocker arm balls during every engine rebuild.