I finished my headgasket install nearly 4 weeks ago. car was great, and everything went by the book. i flushed out the cooling system, new pump and new behr thermostat........

any how, i drove the car for roughly a week and then it started making a loud screeching noise...so again, took some things apart and found out a bad fan bearing bracket, and a end-of life smog pump bearing....so ordered the parts and started changing the parts...i off course had to drain most of coolant since the coolant pipe above the fan bearing bracket had to come out, and there was still some oily residue in the expansion tank despite the flush i did after the headgasket.....

any how, today, i finished the car, decided to do another system flush using the prestone stuff. i drove it around for a couple of hours to make sure all the scaling and oily residue is removed. then this evening i drained the block and the radiator, flushed with the running water hose, and put in finally some new coolant......


after i started the car once the new coolant was in. i was waiting to top off the system, with the cap off. there was a strange wining noise coming from the water pump area!!! i was very worried, and i was thinking in my head that no coolant is getting to the pump, and that the internal pump bearing will overheat and die..... so i turned off the car, and started again ..the noise came back . so i decided to take out the thermostat, just to see what is going on...it was completely dry in there......i ran it then for a couple of seconds without the thermostat and nothing improved. so i turned it off again not sure what to do...!!! i did not want to destroy the new pump. i opened it back again and installed the thermostat, and put more coolant in the expansion tank.....started the car and the noise stopped....all the sudden the auxiliary fans came on the tempreture was around 105-110 ....!!!!!i was terrified that maybe the pump was damaged complelty,,,,,i turned it off again, and waited a couple of minutes, and then all the sudden the temp went back to normal and everything seemed fine...



so, can anyone explain to me what i did wrong? did i damage the water pump? will a brief jump in temps like that cause any damage? i honestly feel like an idiot, and was commending myself earlier on a job well done on the headgasket....

so what do you guys think? everything back to normal now, should i be worried?


thanks,

__________________
1993 300E, 2.8 M104 .....