COMP Turbo Oil-Less Weird Noise

MoulaZ · 05-27-2019, 03:40 AM

How come the sound disappears just by shutting it off and turning it back on? That doesn't seem right at all to me. I get the feeling I may have under greased it. The only remote idea that makes some sense when I think about it, is the grease while liquefied is spun outwards and not lubing properly while the turbo is spinning, and shutting it off allows that liquefied grease to pool a bit enough for it to lube the shaft (or get to somewhere it's needed) so that when starting back up again the sound is significantly mitigated.

And yes, I can hear it spin down when shutting the car off when hot (takes about 40 seconds last time I counted), and I don't really know how to describe it and the phone mic may not be picking it up but it sounds different to the noise it makes spinning down.

Also in that clip you can hear another odd noise between 0:10-0:13 & 0:17-0:23, like this odd whining down that repeats every half second or so.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Comp turbo leaking coolant from zerk fitting	Jinxx	Forced Induction	39	12-27-2019 01:45 PM
COMP Turbo Oil-Less Service Question	MoulaZ	Forced Induction	20	03-03-2019 02:27 AM
Comp turbo failure less than a mile	knuckles899	Forced Induction	167	12-21-2018 10:40 AM
Another DIY Twin Turbo kit (COMP oil-less turbos)	thangcu35	Forced Induction	138	03-16-2018 10:30 AM
[FOR SALE] (2) Comp Turbo CT4X 6262 3BB Fully customized!!!	Nismo350z#310	Parts for sale (Private Classifieds)	11	12-02-2016 05:23 AM

05-27-2019, 03:40 AM	#5 (permalink)
MoulaZ Base Member Join Date: Jun 2013 Location: Sydney, Australia Posts: 230 Drives: '09 Z34 BP Turbo V2 Rep Power: 25	How come the sound disappears just by shutting it off and turning it back on? That doesn't seem right at all to me. I get the feeling I may have under greased it. The only remote idea that makes some sense when I think about it, is the grease while liquefied is spun outwards and not lubing properly while the turbo is spinning, and shutting it off allows that liquefied grease to pool a bit enough for it to lube the shaft (or get to somewhere it's needed) so that when starting back up again the sound is significantly mitigated. And yes, I can hear it spin down when shutting the car off when hot (takes about 40 seconds last time I counted), and I don't really know how to describe it and the phone mic may not be picking it up but it sounds different to the noise it makes spinning down. Also in that clip you can hear another odd noise between 0:10-0:13 & 0:17-0:23, like this odd whining down that repeats every half second or so.