Re: Johnson CM30 = Damaged Intercooler?
Coolant Pumps can only generate a few PSI of pressure. If your intercooler is isolated from the engine there is no real pressure on the IC and the pump is not going to cause an issue. THe stock system went from zero to like 15 PSIG every time you started and warmed the motor up. That stretching is like doing an accordian in and out causing metallic stress on the thin tubing and leading to cracks and leaks.
IMHO separate the cooling loops and dont worry about the pump capacity unless it is a fuel pump that can generate like 40 psig. My utube videos showed the testing and pressure / flow of stock and better pumps and I remember only like 3 or 4 psi capacity. Woody