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06-04-2013
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#11 | |
  
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,812
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Re: Unknow strange engine noise
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And concur....just remove the belt which will eliminate all pulley noise 
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06-05-2013
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#12 | |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,173
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Re: Unknow strange engine noise
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-05-2013
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#13 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,160
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Re: Unknow strange engine noise
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My thoughts as well -=JEFF=-
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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06-05-2013
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#14 | |
 Join Date: Apr 2013
Location: Eastern Missouri
Posts: 773
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Re: Unknow strange engine noise
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[LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] **Now Sold** 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER] |
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06-05-2013
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#15 | |
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,812
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Re: Unknow strange engine noise
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06-05-2013
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#16 | |
 
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Unknow strange engine noise
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Scott  Vett owner since 1979._It's about the car and the people |
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06-06-2013
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#17 |
Join Date: May 2013
Location: France
Posts: 55
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Re: Unknow strange engine noise
thanks everyone for ur answers
i will check alternator and pulley asap to change it, i guess i have to take out the throttle body to have access ? |
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06-06-2013
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#18 | |
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,812
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Alternator Pulley
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The Alternator pulley is a bit different unless it is just the bolt that has come loose on end of Alternator shaft. In that case, I modified a 15/16 box wrench to get at the nut on the alternator shaft (made sharper bend on Box end). I actually installed a different Alternator Pulley. See Item #9 Bling (Carter and Others) Brass Colored Alternator Pulley Ebay Brass Colored Alternator Pulley Delco CS130D Alternators 6 Groove Pulley 10476225 This pulley is identical in Outside diameter and Shaft Diameter of original Alternator Pulley. I very thin washer (3/64 inch thick) was used between the pulley and the cooling fins of alternator for exact Pulley spacing.  Alternator, Spacer, Pulley, Washer, Nut, 5/16 inch Allen, 15/16 inch Box Wrench..........................Modifications to 15/16 inch Box Wrench (sharper bend on box end)   Now if it is the Alternator shaft bearings, it is time to rebuild the Alternator or just replace the Alternator. The Alternator has to be removed (most likely the Plenum Removed) although some have suggested you can remove the Alternator without removing the Plenum...(I have always removed the Plenum as I have TB coolant blocked).
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Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 06-06-2013 at 11:32 AM. |
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06-06-2013
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#19 | |
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Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Unknow strange engine noise
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I'd pull the plenum to do the alternator. http://www.zr1netregistry.com/Inform...placement.aspx
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Scott Vett owner since 1979._It's about the car and the people |
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07-29-2013
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#20 |
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Join Date: May 2013
Location: France
Posts: 55
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Re: Unknown strange engine noise
hello again
i didn't change the pulley yet but when i was cleaning the engine this week-end, i've noticed that one "wings" of the alternator was broken i guess is not big deal but just in case, i was looking for a new alternator do you know what is the difference between the one from ecklers http://www.ecklerscorvette.com/corve...1990-1995.html and the one from rockauto http://www.rockauto.com/catalog/more...487&cc=1041275 or http://www.rockauto.com/catalog/more...039&cc=1041275 there is more than 100$ difference 
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Linear Mode
