What an intercooler boot connects and why a flexible sleeve is used at all, why engine movement rather than boost is the main load, the three common failure modes, clamp and pipe-end problems, and matching a boot to a core.
Why a coolant hose and a charge hose of the same bore are not interchangeable: liquid against oil mist, steady pressure against boost pulses, different temperature duty, and how reinforcement and lining follow the application.
Why a bead exists on a hose neck, how rolled and welded beads differ, why surface finish and burrs destroy the inner wall, insertion depth and clamp position, and when a bead is the wrong answer for a joint.
What a minimum bend radius really describes, what happens to the wall and bore inside a tight bend, kinking and collapse under vacuum, how wall construction sets the limit, and routing practice that protects the curve.
Why fluid absorption softens silicone from the inside, how oil mist and coolant reach the structural wall, why heat accelerates the change, what the reinforcement does while the wall weakens, and how to choose a lining for fluid contact.
How an elastomer ages on the shelf, the three factors that degrade stored hose, why silicone survives storage better than rubber, sensible storage practice, and how to judge an old hose before fitting it to a pressurised joint.
Why a clamped silicone joint is sealed by compression and elastic memory rather than force, what overtightening does to the wall and the reinforcement, how clamp band style spreads load, and how to inspect a joint that keeps weeping.
What makes up an intercooler water system: the pump and flow, the heat exchanger, the reservoir or ice box, bleeding, and what living with a water system involves.
