Nine Cylinder-Head Truths That Debunk the Average Rebuild Advice
The most powerful production six-cylinder is a Porsche flat-six, not a V6—and before you touch a gasket, strip the head completely or risk catastrophic wear. Cast iron and aluminum demand opposite cleaning strategies, degreasers need six to eight hours, and pressure washing is non-negotiable. Flash-rust appears in minutes; hairline cracks hide until you look.