Weird noise on cold motor

[gts-wpn]

This problem has suddenly risen out of no where...but im suspecting it could be the power sterring pump...but then again its just a wild guess...anyway it makes a loud grinding noise as you start to turn the sterring wheel in any direction. Then after 5 mins of driving and the car warms up the noise is gone completely. And wont come back until the cars engine cools down again. Anyone got an idea what it going on...by the way its an R33 s1 with just over 100,000 ks on the clock, Cheers.

[Jolinator]

check powersteering fluid level, if its low, you can just use normal auto trans fluid

[maximumrpm]

i had the same problem...it was the dump pipe moving...just had to do up the bolts a little harder