guys, juz wanna ask sumthing.

i did top overhaul last 2 months or so. things are fine, but there is one thing tht kinda bugs me. whenver the car was left idle for a very long time, say, 8 hours like tht. when i start the engine, i will warm the engine up before moving. after the engine have been warmed up, when i turned on the AC, there is this squeking sound of the timing belt. i noticed this for quite some time already, then one day i decided to open the hood and see it.

i look at the timing belt rotation speed, it was ok at first, then i tried turning on the AC, then the soudn appears, i also noticed that the speed of the timing belt has dropped and turned a bit slower before i turn on the AC. i asked my mech, he said it could be the crank pulleys and need to change it.

however, the sound is will not appear after the engine is fully warmed up and i've been driving it for a while even with the AC on. so, just wanna ask u pros here, can u guys tell me wat is wrong? i got think of spraying some lubricant to the pulleys, will it help? sorry for the long post.

my friend said the exact same things, but he said that crank pulleys doesn't need to be replaced, and need to change under certain conditions. wat he suggested was, the pulleys are a bit loose and need to be tightened up, or, because it happen when i turn the AC on, he also suggested that it could be the AC compressor needs to be serviced. anyone had the same idea as well?

This post has been edited by sqwerk2: Nov 17 2009, 11:06 AM

to be exact its not during cold, as long as the car is not turned on for at least half an hour the sound would appear once u turned the engine on and the AC at the same time.