News

Clear coat on a carbon part lifts at edges and holes long before it fails in the middle of a panel. How blush, mould release and sanding dust break adhesion, and how to tell a coating failure from resin that has failed underneath.

A stain that appears beside a weld long after fitting usually means the heat left the chromium depleted. How sensitisation differs from free iron, heat tint and a pinhole leak, and the checks that tell each of them apart at the joint.

Gold on a titanium tip is normal oxide growth; brown is not. How baked-on contamination, iron left by abrasives and genuine overheating all produce the same dull colour, and the solvent wipe and magnet checks that separate them.

Brown staining along a muffler seam, or a rusty drip after a cold start, means the inner shell is corroding while the outside still looks fine. What drives it, how to separate it from external rust and a weld problem, and the checks that settle it.

A catch can filling quickly is reporting what the engine produces, so the contents matter more than the volume. This entry separates water emulsion from oil mist, and blow-by from a badly routed installation.

A hiss inward when a cap is opened means the vessel pulled a vacuum, which points at its vent rather than the cap. This entry covers breather sizing, how catch cans and fuel tanks behave alike, and a cap check.

A misting oil film at a turbo union after a rebuild is usually a pressure balance fault, not a failed seal. This entry separates crankcase pressure, a restricted oil drain and a distorted joint, with a check for each.

Water at an exhaust joint in the first minutes after a cold start is usually condensate, not a leak. This entry explains the condensation mechanism, why joints collect it, and how to separate it from a coolant weep or a failed gasket.