Leaks are bad

One of our many Miatas sprung a leak. Boo.

http://grassrootsmotorsports.com/project-cars/1991-mazda-miata2/most-unfortunate-leak/

M'k?

If it aint leakin, its out.

Left a temporary fix for you on the project car comment line. The radiator top tank cracked in our '97 Camry after a hard uphill pull at high altitude. Since the pressure differential was even greater than at sea level, the car was spewing pretty good. Refilling the cooling system (after a cooldown, of course) and depressurizing the system by running the radiator cap backed off a quarter or half turn meant we could drive 70 miles back home at 60 miles per hour while losing only a few tablespoonfuls of coolant.

You'd be surprised how little those pinholes will leak if you back off on the cap until the new pump arrives.

Looks like the leak is actually in the steel pipe that's pressed into the inlet. Must have rusted out. A DIY fix would be to pull that pipe out and replace it with a brass 90 degree fitting and hose barb after tapping the hole. I'd rather see a proper replacement (as you is doing), but it's an option.

My Miata has a coolant leak somewhere downstream of the thermostat in the home brew reroute kit the PO put together. It never puddles, but once the stat opens, I can smell a little coolant at every stoplight.

My WRX seems to have a small leak from the top of the rad too!

Seems like a common problem. Time to find a rad.