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01-28-2013, 12:17 PM
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#1 (permalink) |
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Diesel Fanatic
Join Date: Sep 2012
Location: Carrollton Illinois
Posts: 60
iTrader Score: 0 reviews
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turbo bearings bad?
i have an 04.5 lly with 161k on it. when its cold and i start it up, even if i let it run for 5 to 10 minutes, i will take off easy with barely any throttle and never exceed 2k.i also put it on my low boost (lb7) tune but yet it will built 10lbs of boost with hardly any throttle. it makes this sound from under the hood that sounds exactly like a supercharger whine. once it warms up, its gone and will whistle like a normal turbo. could this be my bearings?
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2004.5 LLY CCSB efi live,alligator stage 4 trans, custom made t case brace,billet stock turbo,stage 3 water/meth injection, twin kennedy pumps, all fuel fittings ported and fuel rail plug, lbz mouthpiece, k&n intake, 3 inch downpipe, 4inch magnaflow, green keys and 2 inch blocks, 35 all terrains and ranchos, PCV reroutes and egr detele. tripple pillar glow shift digital boost egt oil temp and fuel pressure. 18" eagle alloy 197s |
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01-28-2013, 01:27 PM
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#2 (permalink) |
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Diesel Fanatic
Join Date: Nov 2004
Location: Carbondale CO.
Posts: 61
iTrader Score: 0 reviews
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On a cold engine I would guess power steering pump whine or something else.
Keep in mind the turbo spins something like 10,000+RPM under normal operating conditions. If you had bad bearings that were making noise they would show themselves in short order. There are all kinds of fluids and bearings that are part of the accessory drive that can be clod and make a slight whine until warm.
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05' Ext Cab. D-max allison with predator ver 2.0, PPE boost controler, banks 4" system that let the cat out, head studs and gaskets. Goodyear 285-70-17 silent armor pro-grade tires. |
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01-28-2013, 03:01 PM
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#3 (permalink) |
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Diesel Master
Join Date: Jan 2011
Location: On the island, NY
Posts: 1,002
iTrader Score: 0 reviews
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That's normal.
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UWUA AFL-CIO Local 1-2 05 dirtymax 2500 CCSB 4X4-196, 000 miles  PPE Standard, Edge insight, Silverline 4", 265 transforce, pcv rerouted, egr blocked, kitty delete, AFE turbo inlet, and a bunch of little stuff. *WTB-03-07 chevy 2500 front bumper and plastics* |
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01-28-2013, 03:38 PM
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#4 (permalink) |
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Diesel Fanatic
Join Date: Sep 2012
Location: Carrollton Illinois
Posts: 60
iTrader Score: 0 reviews
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ok i wasnt sure because ive read many things saying they could go. Isnt there a kind of power steering mod to stop it from that?
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2004.5 LLY CCSB efi live,alligator stage 4 trans, custom made t case brace,billet stock turbo,stage 3 water/meth injection, twin kennedy pumps, all fuel fittings ported and fuel rail plug, lbz mouthpiece, k&n intake, 3 inch downpipe, 4inch magnaflow, green keys and 2 inch blocks, 35 all terrains and ranchos, PCV reroutes and egr detele. tripple pillar glow shift digital boost egt oil temp and fuel pressure. 18" eagle alloy 197s |
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01-30-2013, 01:30 PM
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#5 (permalink) | |
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Diesel Master
Join Date: Sep 2010
Location: Maritimes, Canada
Posts: 2,345
iTrader Score: 0 reviews
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Quote:
Usually the turbo vanes are set to be open when cold (ie makes boost easily and has a loud hissing sound) and then will close up as it warm up.....helps the engine heat up faster and is perfectly normal.
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2005 Silverado EC/SB, LLY, 4WD, EFI DSP5 V2 (Idaho Rob at ATP), Edge CTS w/ EGT probe, LML Exhaust Manifold, PPE shimmed FPRV, Banks LBZ Ram Air Intake, RDL EGR Delete, LBZ Turbo Mouthpiece (w/ blocked resonator & rerouted PCV), Kennedy twin lift pumps w/ megafilter, Corsa 4" Turbo Back 304 SS Exhaust, Mike L tranny cooler, EXAXT Steering System, Redhead Power Steering Box w/ Amsoil PS fluid, Green Torsion Keys, Allison Deep Pan w/ Suncoast Filterlock and Transynd ATF, Bilstein 5100's (Norcal), Cognito UCA's, 17" NBS alloy rims, 265/70R17 Michelin LTX M/S2's, Pioneer AVH-P3200BT, CubbyCam Backup Camera, Pop & Lock Power Tailgate Lock, Extang Solid Fold Tonneau Cover, Tekonsha P3 Brake controller, Alphatherm AT-38OD Washer Fluid Heater 2011 Forest River Surveyor 235RKS |
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01-30-2013, 05:41 PM
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#6 (permalink) |
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Diesel Master
Join Date: Mar 2009
Location: Beautiful California
Posts: 1,132
iTrader Score: 0 reviews
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Whine or whistle?
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2005 Chevy Silverado 3500LT SRW D/A CC/LB LLY 4x4 (loaded) LBZ MP, TxCAI, PS Cooler, Stack Seal, Edge Insight CTS, E837 Aux Radiator w/fan, Renodmax/Earl's Trans Cooler, Mass/IAT Shield, Fuel Cooler Fan, LML manifold NuWa Hitchhiker II LS 29.5LKTG 5th Wheel |
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01-30-2013, 06:01 PM
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#7 (permalink) |
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Resident Gynecologist....
 
Join Date: Feb 2008
Location: United Kingdom
Posts: 2,749
iTrader Score: 0 reviews
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hard to diagnose with out hearing it, any chance of video
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2006 LBZ duramax silverado CCSB 4x4. Banks power big hoss kit with power pda, MBRP cat-delete front pipe, BD full bore manifold + Thermocouple, kennedy diesel EGR blocker, Diamondback bed cover, Line-X bed liner, Southwest fabricators front bumper, Fab-tech HD tie rods, UK modified towing hitch, Airdog II 165 installed with swagelok stainless fittings & lines, Biodiesel Blending, PCV reroute with tony's AN pcv fittings. Member #23 of the OIL is OIL association NEW years MOTTO. Time to split some wigs and kick some ass. Anyone in the way BETTER MOVE Quote: Originally Posted by GoneNomad  ^ Yeah, but you also drive on the wrong side of the road, too, so... |
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