i took the car to lexus to have the other problem i had and they said that the engine is making a really loud noise like if metal was hitting metal....they say is something internal...i dunno i never had that problem they said that moisture got inside the engine....i dunno....what should i do?
maybe an oil change? or flush the oil? please help

moisture inside the engine???

They told you that?

Moisture in the engine? When does it make this noise?

There are many possible "internal" sources...perhaps it could be a bad idler or failing water pump?? How many miles on the engine?

Rod G