Hi folks,
I've done a coolant flash at Valvoline last week. After that, I can hear a rattle sound sometimes coming from the area where all the belts are. The sound comes at 1500-2000 rpm and closely resembles the one which you can hear from toy's car wheels - "hrrr, hrrr".
Can there be ANY connection between such sound and the replacement of coolant?
And what could this sound mean? Is my camry dying?

Btw, its ~120000 and the timing belt has been replaced at 63000. Is this the time to replace it again or can I drive for ~10000 miles more or so?