JBD15 Posted October 29, 2012 Share Posted October 29, 2012 My 96 ch613 E7 427 made a short loud whirring sound under excelleration between shifts and now the turbo makes a louder than normal whistle at rpm drop down. Still puts out 32 boost and no smoke. Is it about to fail ? What should i check ? Suggestions ? Thanks. Quote Link to comment Share on other sites More sharing options...
fullfuel01 Posted October 29, 2012 Share Posted October 29, 2012 check for air filter element, loose clamp, hole in air/air and or piping. Quote Link to comment Share on other sites More sharing options...
staxx Posted October 29, 2012 Share Posted October 29, 2012 Turbo shaft end play, exhaust manifold leaks, cracks air compressor intake piping. Quote Link to comment Share on other sites More sharing options...
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