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GT28RS Isn't sounding healthy, thoughts?
#1586719
14/10/2016 19:36
14/10/2016 19:36
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charlieb01
Unregistered
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charlieb01
Unregistered
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So 18 months ago i bought a GT28RS from a guy on the Coupe parts for sale page on FB, it was said to have done 8,000 miles. Fast forward 18 months and i've just got round to fitting it as the standard turbo seals have gone. Along with the turbo i also fitted a SIP, FMIC, 3' downpipe and changed a cracked manifold with a remap to come. This afternoon the car woke up after 4 months of sleeping and sounded awesome, turned the engine off and heard this very loud metal on metal sound for around 10 seconds. It can only be the turbo as it's loudest by the air filter. After a bit of research i see some people on pistonheads saying BB turbos often make this winding down sound and it's nothing to worry about. I'm very paranoid as it's so loud but can i have some opinions? Thanks https://www.youtube.com/watch?v=ucNt74hIT5k&feature=youtu.beBetter video: https://www.youtube.com/watch?v=1THmsd1avsk&feature=youtu.be
Last edited by charlieb01; 15/10/2016 22:50.
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586723
14/10/2016 20:32
14/10/2016 20:32
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nismo
Unregistered
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nismo
Unregistered
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did you prime the turbo before starting the car and are you using a oil restrictor on the turbo oil feed ?
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586724
14/10/2016 20:34
14/10/2016 20:34
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Joined: Oct 2010
Posts: 555
Bulgaria
Ferrarist
Enjoying the ride
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Enjoying the ride
Joined: Oct 2010
Posts: 555
Bulgaria
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Had same sound, same turbo.....it last 5-6 sec no matter warm or hot engine.....
Just watch the video.....your sound lasts a little bit longer......
Last edited by Ferrarist; 14/10/2016 20:36.
20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586729
14/10/2016 21:16
14/10/2016 21:16
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crgracing
Unregistered
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crgracing
Unregistered
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If its a blowing noise its normal. If you hear a very fine grinding could be the start of worn bearings.
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586732
14/10/2016 21:27
14/10/2016 21:27
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charlieb01
Unregistered
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charlieb01
Unregistered
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If its a blowing noise its normal. If you hear a very fine grinding could be the start of worn bearings. The best way to describe it is like putting some metal balls in a metal pot and spinning it so the balls run around the wall of the pot... if that makes sense. It's not a blowing noise. did you prime the turbo before starting the car and are you using a oil restrictor on the turbo oil feed Yes to both, i don't think it's something that's occurred while i ran it. Could be wrong though.
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586796
15/10/2016 17:57
15/10/2016 17:57
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charlieb01
Unregistered
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charlieb01
Unregistered
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Just taken the SIP off and had a good look.
Virtually zero shaft play, oil pressure is good, there is oil present in the return to sump, zero scratch marks, turbine spins well, the SIP was exaggerating the sound but it is still there just less prominent.
Will upload a good video of it later tonight.
Hopefully it's paranoia.
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: ]
#1586808
15/10/2016 22:50
15/10/2016 22:50
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charlieb01
Unregistered
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charlieb01
Unregistered
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Re: GT28RS Isn't sounding healthy, thoughts?
[Re: Flea]
#1586924
17/10/2016 19:52
17/10/2016 19:52
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charlieb01
Unregistered
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charlieb01
Unregistered
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That's a familiar sound for a ball bearing turbo, certainly more important that you can hear it spin down after shutting the engine, if it doesn't then you have a problem. I can breathe deeply. Thanks!
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