brake cleaner is way too strong. It will attack all the plastics and rubbers.

I think ordinary warm water with a bit of scrubbing should remove coolant. A bit of soap if necessary.

Just use any all-purpse cleaner. Technically you can use non-chlorinated brake cleaner since it's safe for plastic and rubber components (it needs to say "non-chlorinated" on the can), but it's really overkill. 

Use the full concentration of the all-purpose cleaner, not mixed with water. Be sure to not let the cleaner dry on any surface as it will stain. Wash it down as soon as you scrub the area.

Thanks!!

Spray the engine down with Tire Cleaner, let drip off and wipe down.  NO water!