Thanks for all the input.... I only drained about half the cooland out.... (only opened the plug on the radiator) So I was able to use the rest of my bmw coolant I had left over.... mix'n with a little distilled water, and its good as new!
I just hope I never have to do that job again. Anyone try to replace the thermostat on the M60?? You can't even really see the bolts on the engine side of the thermo housing.. Plus there are other cords in the way... Plus with a cracked housing, EVERYTHING around there has this slippery layer of coolant all over it. Makes it hard to guide sockets into place
And when they reccomend to remove the radiator fan... its probably a good idea, I fought with that thing the entire time I was change'n the thermostat & housing!
good news is.... no more coolant leak! (that I've noticed)
Former: 95-530iM
Current: 99 GMC Seirra 1500