brownhornet Donating Members 124 Member For: 16y 7m 18d Gender: Male Location: Perth Posted 02/10/13 12:05 PM Share Posted 02/10/13 12:05 PM Hi Guys - been getting a strange noise from what I think is the turbo. First time it happened I shat myself because I was giving it a bootful on a freeway on ramp and it sounded like a police siren! I thought it might be the BOV because it happened when I was backing off the loud pedal. It doesn't happen all the time and the car is otherwise running normally and boostin well. Today it happened under about 75% throttle. I backed off and then gave it a bootful but it didn't repeat the sound. Car has done 175K kms Link to comment Share on other sites More sharing options...
Red R6 Donating Members 41 Member For: 12y 3m 2d Posted 03/10/13 10:37 AM Share Posted 03/10/13 10:37 AM Bearing might be going, I would check the shaft play Link to comment Share on other sites More sharing options...
Doddo22 Member 135 Member For: 12y 10d Gender: Male Location: Newcastle Posted 03/10/13 11:48 PM Share Posted 03/10/13 11:48 PM bearing harmonics maybe Link to comment Share on other sites More sharing options...
brownhornet Donating Members 124 Member For: 16y 7m 18d Gender: Male Location: Perth Posted 04/10/13 05:46 AM Author Share Posted 04/10/13 05:46 AM What are bearing harmonics? The reason I was thinking BOV is because it sort of sounds like the whirring/whining whooshing noise you hear from ricer cars when they are changing gears. I sh*t you not though - I could have sworn it was a cop siren in the distance behind me when it first happened!! Link to comment Share on other sites More sharing options...
Doddo22 Member 135 Member For: 12y 10d Gender: Male Location: Newcastle Posted 04/10/13 10:20 PM Share Posted 04/10/13 10:20 PM under heavy vibration (bearing failing) at certain rpm they can make emit a high pitch ringing sound but I dont think it would be that loud Link to comment Share on other sites More sharing options...
jas98 Member 1,046 Member For: 12y 7m 14d Gender: Male Location: Maryborough Qld Posted 05/10/13 12:52 AM Share Posted 05/10/13 12:52 AM Boost leak maybe.?. Link to comment Share on other sites More sharing options...
skidxr6t skids Donating Members 2,754 Member For: 12y 2m 9d Gender: Not Telling Posted 05/10/13 01:40 AM Share Posted 05/10/13 01:40 AM Does it have a noise when turn motor off? Link to comment Share on other sites More sharing options...
brownhornet Donating Members 124 Member For: 16y 7m 18d Gender: Male Location: Perth Posted 08/10/13 12:02 AM Author Share Posted 08/10/13 12:02 AM Does it have a noise when turn motor off?No noise when engine is turned off.Boost leak is a possibility but surely it would howl every time it boosted? Same with bent fin or bearing problems...I don't know enough about bovs to be sure but can they get stuck - ie not open enough and create different noises? Link to comment Share on other sites More sharing options...
Doddo22 Member 135 Member For: 12y 10d Gender: Male Location: Newcastle Posted 08/10/13 01:00 AM Share Posted 08/10/13 01:00 AM simple way to test if it is the BOV pull it off and plug holes and see if the noise continues Link to comment Share on other sites More sharing options...
brownhornet Donating Members 124 Member For: 16y 7m 18d Gender: Male Location: Perth Posted 22/10/13 10:38 PM Author Share Posted 22/10/13 10:38 PM Well, it's been a couple of weeks and the noise hasn't repeated once. Is it possible there was a temporary obstruction in the BOV? Link to comment Share on other sites More sharing options...
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