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

low coolant light (1987)

Thread Tools
 
Search this Thread
 
Old Mar 10, 2002 | 07:55 AM
  #1  
MITCH's Avatar
MITCH
Thread Starter
Drifting
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Feb 1999
Posts: 1,289
Likes: 11
From: long island NY
Default low coolant light (1987)

i have changed the sensor twice i have packed the rad 4 times. changed the rad cap i have no leaks car does not run hot.
any ideas help please!!!!!!
thanks in advance mitch
speednut2@aol.com :confused: :confused: :confused: :confused:
Reply
Old Mar 10, 2002 | 12:34 PM
  #2  
War Machine's Avatar
War Machine
Le Mans Master
 
Joined: Aug 2000
Posts: 5,192
Likes: 1
From: Airport Cruise-in 1 Veteran Airport Cruise-in 2 Veteran
Cruise-In II Veteran
Default Re: low coolant light (MITCH)

I'm reading the Helm and there are 2 (14,15) codes for coolant temp. If you have a scan tool it would be easier to diagnose the problem b/c the first test on both codes is to hook up a scan tool. You changed sensors already so after that would be to check for a short in the yellow wire, open sensor ground circiut, faulty connection at ECM or faulty ECM. HTH a little.
Reply
Old Mar 10, 2002 | 08:30 PM
  #3  
BBA's Avatar
BBA
Safety Car
20 Year Member
 
Joined: Dec 2000
Posts: 3,767
Likes: 5
From: Jacksonville Fl
Default Re: low coolant light (MITCH)

My 87 was setting the light off a lot until I started rotating ( I spun it 180º ) the actual sensor/switch installed position...now it works fine.
Reply
Old Mar 15, 2002 | 04:38 PM
  #4  
MITCH's Avatar
MITCH
Thread Starter
Drifting
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Feb 1999
Posts: 1,289
Likes: 11
From: long island NY
Default Re: low coolant light (MITCH)

thanks for the replys i will check it this weekend :chevy
Reply
Old Mar 15, 2002 | 06:56 PM
  #5  
John G 92's Avatar
John G 92
Pro
 
Joined: Jun 2001
Posts: 594
Likes: 0
From: Fairfield CT U.S.A. CT
Default Re: low coolant light (MITCH)

My 87 dose the samething ever once in a wile the low coolant light will come on and go off and the level is fine. :confused:
Reply
Old Mar 16, 2002 | 07:39 PM
  #6  
MITCH's Avatar
MITCH
Thread Starter
Drifting
25 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Feb 1999
Posts: 1,289
Likes: 11
From: long island NY
Default Re: low coolant light (MITCH)

this car is driving me nuts i tried all of the above things but it still comes on
engine temp is 175 to 185 does not run hot and thermo is opening and closing any ideas i am lost need help.
mitch
speednut2@aol.com :confused: :confused: :confused: :confused:
Reply
Old Mar 17, 2002 | 12:37 AM
  #7  
Raidmagic's Avatar
Raidmagic
Melting Slicks
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2001
Posts: 2,315
Likes: 110
From: Brandon Fl
Default Re: low coolant light (MITCH)

I have an '87 and since I replaced the rad. my light comes and goes as it pleases the car doesn't run hot or leak.
Reply
Old Mar 17, 2002 | 04:32 AM
  #8  
Ezgoin721's Avatar
Ezgoin721
Burning Brakes
 
Joined: Apr 2001
Posts: 844
Likes: 3
From: Kennewick, Wa. USA
Default Re: low coolant light (MITCH)

I have the same problem on my 87. I read an artical a while back that listed about 10 common causes for this problem. I finally got tired of chaseing the problem and just ignore the light as it comes and goes. :cuss
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-1

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-2

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-3

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-4

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

 Joe Kucinski
story-5

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-6

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

 Joe Kucinski
story-7

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

 Verdad Gallardo
story-8

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-9

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

 Michael S. Palmer
Old Mar 18, 2002 | 02:56 PM
  #9  
purple jinx's Avatar
purple jinx
Racer
 
Joined: Jul 2001
Posts: 346
Likes: 0
From: southwestern Michigan USA
Default Re: low coolant light (John G 92)

My 87 dose the samething ever once in a wile the low coolant light will come on and go off and the level is fine. :confused:
ditto!
Reply
Old Mar 18, 2002 | 03:10 PM
  #10  
Hawaii89vette's Avatar
Hawaii89vette
Racer
15 Year Member
 
Joined: Mar 2001
Posts: 280
Likes: 0
From: Honolulu Hawaii
Default Re: low coolant light

I had the same problem too. On mines, I noticed that the light came on when the temp reached the thermostat temp. The coolant wasn't being pulled from the overflow tank. What I did was put some of that Bar's Leak Radiator leak sealing powder in and the problem went away.

-Tim
Reply
Old Mar 18, 2002 | 03:48 PM
  #11  
CoolVette86's Avatar
CoolVette86
Race Director
20 Year Member
 
Joined: Sep 2000
Posts: 12,182
Likes: 1
From: Partying with the Cowboys cheerleaders in Mt. Olive, New Jersey
Default Re: low coolant light (BBA)

My 87 was setting the light off a lot until I started rotating ( I spun it 180º ) the actual sensor/switch installed position...now it works fine.
My brother's '87 had that problem and I did exactly what BBA did... voila!!
Reply
Old Jun 28, 2013 | 04:20 AM
  #12  
toboss's Avatar
toboss
1st Gear
 
Joined: Jun 2013
Posts: 1
Likes: 0
Default corvette

Originally Posted by CoolVette86
My brother's '87 had that problem and I did exactly what BBA did... voila!!
What did you spin mine dose it at about 210 then will not run with out constant pressure to gas pedal
Reply
Old Jun 28, 2013 | 09:08 AM
  #13  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

You have to drill two small holes in your thermostat, then refill the system and properly burp your cooling system.

I had this problem for years and tried ALL the things mentioned above. I repacked, repacked AND repacked, all to no avail.

Once I drilled the thermostat holes and properly purged the system - THE PROBLEM WAS FINALLY SOLVED. Check it out.
Attached Images
Reply
Old Jul 2, 2013 | 08:43 PM
  #14  
Bon Air's Avatar
Bon Air
Intermediate
 
Joined: Jul 2011
Posts: 42
Likes: 2
Default

My '87 light used to go on/off, I made sure the overflow tank was at least half full, it replaced the level in the radiator as fluid is circulated in the engine. Light went off.
Bon Air
Reply
Old Jul 3, 2013 | 02:59 AM
  #15  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

My low coolant light came and went until I replaced the radiator cap. I have heard of others fixing theirs the same way. Strange but true.
Reply

Get notified of new replies

To low coolant light (1987)





All times are GMT -4. The time now is 10:23 AM.

story-0
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-1
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-2
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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