Petrol boils off too quickly to be a massive problem, it's vapour and gone before anything happens. Brake fluid has a high boiling point, a low flash point, an

Petrol boils off too quickly to be a massive problem, it's vapour and gone before anything happens. Brake fluid has a high boiling point, a low flash point, and it's sticky. Burst a brake pipe and spray that onto a hot exhaust and you've got a great source of fire. I know from personal experience that if you can get the exhaust manifold hot enough (like, dull red) and you pop a coolant line, the water will boil into steam leaving the glycol antifreeze which will burn with an acrid greenish flame.