C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

:0 help!!!!!!!

Thread Tools
 
Search this Thread
 
Old Jun 13, 2012 | 12:26 PM
  #1  
85 C4ORCE's Avatar
85 C4ORCE
Thread Starter
Heel & Toe
 
Joined: Jun 2012
Posts: 21
Likes: 0
From: woodruff sc
Default :0 help!!!!!!!

Went out side to drive the vette to work yesterday and when i turned the switch over it fired up beautifully but started making a whining noise, so opened the hood to see where it was coming from then i hear a clacking sound. Seems to be coming from the left side of the motor. The clacking is an on and off thing but the whine is constant. So my first guess was bearings in the smog pump or alternator so i did the old screw driver to the ear trick and they both sounded normal. Any suggestions?
Reply
Old Jun 13, 2012 | 01:13 PM
  #2  
ch@0s's Avatar
ch@0s
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Default

Originally Posted by 85 C4ORCE
Went out side to drive the vette to work yesterday and when i turned the switch over it fired up beautifully but started making a whining noise, so opened the hood to see where it was coming from then i hear a clacking sound. Seems to be coming from the left side of the motor. The clacking is an on and off thing but the whine is constant. So my first guess was bearings in the smog pump or alternator so i did the old screw driver to the ear trick and they both sounded normal. Any suggestions?
Taking the belts off and running it a little while will tell you if its an accessories or the engine itself.
Reply
Old Jun 13, 2012 | 04:03 PM
  #3  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

What he said. While the belt is off, spin all pulleys for feelings of roughness including W/P and tensioner. Check P/S fluid, they make a whine when empty.
Reply
Old Jun 13, 2012 | 04:34 PM
  #4  
85 C4ORCE's Avatar
85 C4ORCE
Thread Starter
Heel & Toe
 
Joined: Jun 2012
Posts: 21
Likes: 0
From: woodruff sc
Default

First thing i did was check the power steering its full ill take the belt off when i get home and try that
Reply
Old Jun 13, 2012 | 04:49 PM
  #5  
johnnyjr2's Avatar
johnnyjr2
Heel & Toe
 
Joined: Oct 2011
Posts: 16
Likes: 0
From: mn
Default

is your starter staying engaged
Reply
Old Jun 16, 2012 | 10:45 AM
  #6  
85 C4ORCE's Avatar
85 C4ORCE
Thread Starter
Heel & Toe
 
Joined: Jun 2012
Posts: 21
Likes: 0
From: woodruff sc
Default

ok so i took the belt off and as soon as i did i seen the problem. the alternator pulley had backed away from the fan on the front of the alternator and was jus kinda wobbeling so i figured the nut on the front had just came loose (i thjought kinda strange) so i retightened it and when i spun it i noticed it the pulley was terribly off center so i took it completely off and the center of the pulley has been reamed out to big to fit correctly and they dont sell just pulleys so it looks like ill be buying a new alternator
Reply
Old Jun 16, 2012 | 10:54 AM
  #7  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

Originally Posted by 85 C4ORCE
ok so i took the belt off and as soon as i did i seen the problem. the alternator pulley had backed away from the fan on the front of the alternator and was jus kinda wobbeling so i figured the nut on the front had just came loose (i thjought kinda strange) so i retightened it and when i spun it i noticed it the pulley was terribly off center so i took it completely off and the center of the pulley has been reamed out to big to fit correctly and they dont sell just pulleys so it looks like ill be buying a new alternator
Or a local armature shop can replace the bad pull/fan.
Reply

Get notified of new replies

To :0 help!!!!!!!





All times are GMT -4. The time now is 04:46 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE