Toyota corolla 2003 hissing sound?
I have a Toyota corolla 2003, and when the engine its cold and i start it, its start making a hissing sound, which its somewhat loud, it works perfect besides that thing, then again the sounds disappear after 30 minutes ~ 1 hour of running even if the car goes completely cool on the day it wont make it again, my guess could be that the oil when its cold its not working properly and once it heats up it gets stabilized and wont give more trouble later on the day, (till next morning with the same sound again), is there anything i could to other than take it in a shop?
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