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

Stock Pulleys

Thread Tools
 
Search this Thread
 
Old Apr 21, 2010 | 02:29 PM
  #1  
mcfack's Avatar
mcfack
Thread Starter
Instructor
 
Joined: Feb 2008
Posts: 201
Likes: 0
From: The Ham AL
Default Stock Pulleys

I have a problem. Appearantly, whoever had my car before put on a smaller crank pulley, larger water pump pulley, and a larger alternator pulley to get a few more horses. I want to go back to stock pulleys, but after talking to the local dealer I found out that the pulleys are discontinued. I know I can buy them from one of our corvette parts companies or ebay, but I thought I would try here first to see if anyone would be interested in a swap or a cheap purchase. The stock pulleys were only used on 85 to 91 vettes. I was hoping that it was a standard so I could head to the local junk yard, but not the case.

I had an alternator guy put a standard pulley on for me, but now my belt is too long. To get it right, I need a stock water pump pulley (part# 10105209) and a stock crank pulley (part# 14055116).

Anyone out there got some spare stock pulleys?
Reply
Old Apr 21, 2010 | 02:45 PM
  #2  
BADDUCK's Avatar
BADDUCK
Le Mans Master
 
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Default

When you go from under size crank set to standard set, you are going to have to go to a different length belt even if you change back to the full stock set.

You might go on the parts for sale forum and offer a full swap.
Reply
Old Apr 21, 2010 | 08:24 PM
  #3  
383vett's Avatar
383vett
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2003
Posts: 17,697
Likes: 1,667
From: moraga ca
Default

Different size belts are pretty easy to get. They come in approx 1/2" increment sizes. After you get your pulleys, see approximately how much shorter or longer a belt you need and buy that size and one longer and one shorter. Return the ones you don't use.
Reply
Old Apr 21, 2010 | 08:47 PM
  #4  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Default

Sure someone would swap you out for a set real quick..
Reply
Old Apr 21, 2010 | 10:13 PM
  #5  
HlhnEast's Avatar
HlhnEast
Safety Car
 
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Default

Are they steel or billet aluminum? We might be able to work sumthin out, meet halfway on I-20/59. I am 2.5 hrs from Bham.
Reply
Old Apr 23, 2010 | 10:27 AM
  #6  
mcfack's Avatar
mcfack
Thread Starter
Instructor
 
Joined: Feb 2008
Posts: 201
Likes: 0
From: The Ham AL
Default

They are steel, but they have been painted silver (kinda weird). I have already purchased a stock set from a salvage yard. HlhnEast, if you want my old set of pulleys I would be willing to sell them to you and mail them to you rather than drive that far.
Reply
Old Aug 15, 2013 | 01:46 PM
  #7  
cityautokelowna's Avatar
cityautokelowna
5th Gear
 
Joined: Aug 2013
Posts: 5
Likes: 0
Default pulleys

1987 corvette tuned port. I'm have overheating issues, can anyone tell me the original pulley sizes, PLEASE . thanks
Reply
Old Aug 16, 2013 | 03:44 AM
  #8  
Calderone's Avatar
Calderone
Le Mans Master
15 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Default

Originally Posted by cityautokelowna
1987 corvette tuned port. I'm have overheating issues, can anyone tell me the original pulley sizes, PLEASE . thanks
3 years later, i think you should post a brand new thread
to get some help.

Are you sure your overheating problem is caused by the pulleys?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-1

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-2

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-3

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-4

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-5

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-6

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-7

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-8

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-9

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
Old Aug 16, 2013 | 05:29 AM
  #9  
hemivett's Avatar
hemivett
Pro
10 Year Member
 
Joined: Sep 2012
Posts: 610
Likes: 12
From: Seattle Wa
Default

I had an underdrive kit on my 90 GTA, and that thing would idle for an hour in 100 degree weather, and not heat up past 212. I really dont think its the pulleys. What kind of temps are we talking about. Its not uncommon for Corvettes to run between 220-230. h
Reply
Old Aug 16, 2013 | 10:54 AM
  #10  
cityautokelowna's Avatar
cityautokelowna
5th Gear
 
Joined: Aug 2013
Posts: 5
Likes: 0
Default overheating 87 vette

not sure why its over heating, but the pulleys have been changed, I would like to know what the original sizes were, also the front air dam has been ripped off, the two factors might be the problem.
this is a new car to me. not three years
Reply
Old Aug 16, 2013 | 11:25 AM
  #11  
383vett's Avatar
383vett
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2003
Posts: 17,697
Likes: 1,667
From: moraga ca
Default

Originally Posted by cityautokelowna
not sure why its over heating, but the pulleys have been changed, I would like to know what the original sizes were, also the front air dam has been ripped off, the two factors might be the problem.
this is a new car to me. not three years
This post is. It's better to start your own new one so people won't have to read through old achived posts.
Reply
Old Aug 16, 2013 | 01:42 PM
  #12  
corvetteronw's Avatar
corvetteronw
Race Director
Supporting Lifetime
20 Year Member
Veteran: Army
St. Jude 10 Year Donor
Liked
 
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Default

I have a full set of stock pulleys from my 91 that I will sell reasonably.
Oklahoma - have you cleaned out the trash bags, leaves and the Texas armadillo carcass that are probably clogging your radiator? The C4 is a bottom sucker which causes junk to lodge between the radiator and the AC condenser. You can remove the air cleaner assembly and the cover over that space and easily clean out the crud. Here is a pic of the 87 I used to own and the junk I found in there. Shortly after cleaning it out I got stuck on I94 near Gary, Indiana and had to idle in 96* humidity for over 2 hours with no overheating
Before:

After:
Reply
Old Aug 16, 2013 | 02:30 PM
  #13  
cityautokelowna's Avatar
cityautokelowna
5th Gear
 
Joined: Aug 2013
Posts: 5
Likes: 0
Default

thanks, but we have a new rad, new condenser, new water pump etc, we plugged the egr valve, that seemed to help, but I would like to know the sizes of the original pulleys
Reply
Old Aug 16, 2013 | 03:00 PM
  #14  
hemivett's Avatar
hemivett
Pro
10 Year Member
 
Joined: Sep 2012
Posts: 610
Likes: 12
From: Seattle Wa
Default

Try bypassing the heater core, and check your timing. h
Reply
Old Aug 18, 2013 | 03:32 PM
  #15  
FletchUSMC's Avatar
FletchUSMC
Advanced
 
Joined: Jan 2012
Posts: 84
Likes: 0
From: Jacksonville NC
Default stock pulley sizes

Just measured the pulleys from my 87. Crank pulley is 7 9/16", water pump 5 5/8", alternator 2 7/16". These are just sitting in a box as I installed underdrive pulleys this past winter. These measurements are from the outer lip and not the actual surface the belt rides on.
Reply
Old Aug 19, 2013 | 12:52 AM
  #16  
JrRifleCoach's Avatar
JrRifleCoach
Team Owner
20 Year Member
Veteran: Navy
St. Jude 20 Year Donor
Liked
 
Joined: Sep 2003
Posts: 20,172
Likes: 672
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Default

Well fletch, he really needs the actual surface the belt rides on.
Don't need to be exact but within a 1/4 inch.....
Reply
Old Aug 19, 2013 | 04:44 AM
  #17  
FletchUSMC's Avatar
FletchUSMC
Advanced
 
Joined: Jan 2012
Posts: 84
Likes: 0
From: Jacksonville NC
Default

Very well, the belt surface diameters are : crank pulley 7 3/16", water pump 5 1/4", alternator 2 3/16".
Reply

Get notified of new replies

To Stock Pulleys





All times are GMT -4. The time now is 09:30 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-9
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE