89' 240sx engine noise at start up......

I'm a newbie here. And my 89' 240sx engine squeals in cold morning start up even if I did warm up the car, but after 15 seconds it stops. It sounds like it the pullys, belt or fan. I did spray some WD-40 on it, but didn't help. I also notice that when I come to a full stop(At stop signs and lights) the sound comes back and stops in a couple seconds of launch. I NEED HELP!!! IT DRIVING ME CRAZY!!!

change the belt on the thing....and dont oil it.

yea fan belt my dad had the same problem on his van.

yes the noise is the belt. don't spray oil (WD40 is a superlight oil) on the belt, that will only cause it to slip and make more noise. replace the belt, they are cheap and it should be easy.

Turn your AC off before you start the car..

yes the noise is the belt. don't spray oil (WD40 is a superlight oil) on the belt, that will only cause it to slip and make more noise. replace the belt, they are cheap and it should be easy.
Thank you for the advice!

Turn your AC off before you start the car..

Yeah, i always make sure to shut it off before i shut the car off the flush it out...