[rufnek]

It is simply condensation . To jump to gel (sludge) in engine is a simple error in that technicians judgement. (sry) Your coolant level is fine. It is white smoke and not bluish. You will however , want to have your camry checked for gel (sludge) issues. If the car has not been maintained properly , this can create much worse issues. 99 camry is no longer in the campaign issued by Toyota. But you can stop by the local dealership and they can run a report to see if this repair has ever been done.

rufnek
TMDT