motorsport

Chevrolet Blames Valve Coating for IndyCar Engine Swaps

Published May 31, 2026 · Updated May 31, 2026 · Motorsport.com

Chevrolet’s Mark Reuss confirmed that a coating problem on valve guides led to a spate of engine changes during IndyCar warm‑ups in Detroit.

During the IndyCar warm‑up on Sunday in Detroit, GM President Mark Reuss revealed that a supplier issue with the valve and valve guide coating caused the recent engine changes. Reuss explained that the wrong coating on the valve guides caused problems over time, leading to the swaps. mieszalniakolorado.pl

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Chevrolet Blames Valve Coating for IndyCar Engine Swaps

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