i was sitting in a drive thru today when i rolled my window down it sounded almost like a coffe maker. i turned the radio down and found out it was my car. its a 95 240SX BTW. i looked at my temp gauge and it was getting near the hot mark. i then turned the engine off, until the car in front of me started moving. once i did that the sound was almost like a drain sound and when it stopped, i started it back up. it was only off for a few seconds. but then everything was back to normal.

i've had this happen before to a way worse degree. it turned out being the thermostat getting stuck. since it has happened before should i worry about it more or should i just keep driving it.

 

check fluid level

 

possible air in coolant system....happened to me in my s14

 

do you think when i shut it off, the noise was air coming out, or do i need to drain it and refill it?

 

the noise was coolant being sucked from your overflow into your radiator. how long ago did you replace your thermostat?

 

about a year ago

 

Something may be causing your thermostat to go bad, or you have a low fluid level (which means check for leaks). So basically check your fluid, and if it's good then replace your t-stat again.

 

im going to go with air in the system, if you didnt let the air out when you filled up the coolant, a whole lot of problems can arise such as overheating, looping idle, and for me i had 2 radiators pop

 

yeah ive had a lot of problems with overheating. replace tstat, go get it flushed

 

Or try to burp the coolant system. Pretty much what fobby said.