Hi all,

I installed my DDM cai a month ago and nwo i'm starting to hear some weird sound when the car starts up in the morning (I live in vancouver and its around 0 to 3 celcius in the morning). It isnt' like the helicopter sound that other ppl are experiencing and doesn't seem to go away if i engage the clutch. It sounds like a grinding sound but really high pitched and not very loud... any ideas?

 

If it is a high-pitched whine (and isn't a squeal of metal grinding on metal), it may simply be the power steering pump, which is quite normal on start-up.

After the initial start-up, how long and what are you doing when the noise is no longer heard?

 

sorry forgot to mention that it isnt the power steering, its quieter than the power steering whine. Also it dissappears in less than 5 minutes of normal driving. ( car still cold)

 

Perhaps lywheel chatter, due to the dual-mass design. After warming up a bit, the chatter disappears?

Is it a rotational sound that depends on wheel velocity/gear/RPM or any other variables?

 

Hm yes it does, I tried if i pass 2.5k revs (1st/2nd gear) it'll sound... and the best way to describe the sound is....lol [ ernnnn ernnnn ] but high pitched

Thanks for the quick reply!