xr_velocity Donating Members 290 Member For: 18y 3m 24d Gender: Male Location: Sydney Posted 03/11/10 11:00 PM Share Posted 03/11/10 11:00 PM (edited) Hi all,A little while ago I attended a track day where after about the 3rd session on a few laps on my oil light came on, I believe due to overheated oil. Anyway I backed off and let it cool down. Then a few days later I noticed a very loud turbo whine which was directly related to boost, the more load and boost the more whine there was. For example, when idling, cruising, off boost there was no whine. When coming on boost the whine would start, very much a high pitched whine, certainly not just a turbo whistle, I know what that sounds like. At first the whine only happened when the turbo was cold, when it was hot it would stop whining. It is now a constant whine whether hot or cold when on boost.So I changed the turbo cartridge as there was about 1-2mm of in and out shaft play (none up and down), neither intake or exhaust wheels had touched the housing. Whine is still there. But what I did notice is 3 cracks around the bolt holes in the rear housing when I pulled it apart, there may have been more around the housing, I'm not sure. Put it all back together with new cartridge and sure enough the whine is still there. Check for loose intake hoses etc, can't find anything. Power, turbo lag etc all seems the same when driving. I have removed the filter from the turbo line and tested that there is more tan enough oil flow through the oil line by sticking the turbo end of the line into a bottle. Filled the bottle in a few seconds. I do not seem to have a boost leak in the intake, blow off valve still making the same sounds as usual and is making plenty of noise like it is dumping a lot of pressure when I close the throttle.My question is, where is the whine coming from? My guess would be the rear housing causing the whine given it is definitely not bearing related. Edited 03/11/10 11:13 PM by xr_velocity Link to comment Share on other sites More sharing options...
xr_velocity Donating Members 290 Member For: 18y 3m 24d Gender: Male Location: Sydney Posted 03/11/10 11:18 PM Author Share Posted 03/11/10 11:18 PM One last thing I will add is that the whine is far more noticeable on spool up and spool down and constant high load boost ie when cruising down the freeway in a high gear and boosting, it is very constant there. Link to comment Share on other sites More sharing options...
Brods Member 433 Member For: 14y 6m 25d Gender: Male Posted 04/11/10 05:11 AM Share Posted 04/11/10 05:11 AM I get the same whine in my BF. Most noticeable when boosting on the freeway. Link to comment Share on other sites More sharing options...
xr_velocity Donating Members 290 Member For: 18y 3m 24d Gender: Male Location: Sydney Posted 04/11/10 08:06 PM Author Share Posted 04/11/10 08:06 PM Perhaps I should rephrase my question. What are some causes of turbo whine that people have come across in their experience that does not involve wheels hitting housings or bearing issues? Link to comment Share on other sites More sharing options...
Worm A much better forum Silver Donating Members 3,808 Member For: 16y 7m Gender: Male Location: Victoria Posted 05/11/10 08:05 PM Share Posted 05/11/10 08:05 PM Do you have a woman in the car with you?I find they are the main cause of whinage... Link to comment Share on other sites More sharing options...
JVK Silver Donating Members 751 Member For: 19y 2m 5d Gender: Male Location: North West Hot Hell,VIC Posted 05/11/10 08:50 PM Share Posted 05/11/10 08:50 PM Was thinking the same thing Worm.Lol Link to comment Share on other sites More sharing options...
xr6t_ute Donating Members 2,281 Member For: 17y 7m 29d Gender: Male Location: south east suburbs Posted 06/11/10 08:46 AM Share Posted 06/11/10 08:46 AM lol....I know I had that sound from loose turbo bolts Link to comment Share on other sites More sharing options...
Banned1 Banned Banned 734 Member For: 14y 5m 11d Gender: Male Location: Caloundra Posted 06/11/10 10:04 AM Share Posted 06/11/10 10:04 AM boost leak somewhere ? Link to comment Share on other sites More sharing options...
matt036 Donating Members 280 Member For: 15y 1m 15d Gender: Male Posted 05/09/11 06:25 AM Share Posted 05/09/11 06:25 AM Just wondering if you managed to have any resolution to this issue or found a fix for it?After a recent happy laps session of good flogging mines developed a whine as well and im thinkin mine maybe coming from between the manifold to turbo. All bolts on dump and manifold are tight so that's why im wondering if you managed to have any luck? Link to comment Share on other sites More sharing options...
xr_velocity Donating Members 290 Member For: 18y 3m 24d Gender: Male Location: Sydney Posted 16/09/11 09:51 PM Author Share Posted 16/09/11 09:51 PM Unfortunately not. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now