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

1986 coolant temp gauge inaccurate

Thread Tools
 
Search this Thread
 
Old Aug 28, 2011 | 09:26 PM
  #1  
jerseynick's Avatar
jerseynick
Thread Starter
Instructor
15 Year Member
 
Joined: Jun 2004
Posts: 239
Likes: 0
From: Barnegat NJ
Default 1986 coolant temp gauge inaccurate

Guys,
My 86 vette coolant gauge reads about 20 degrees too high. Im assuming it is the sensor that is bad. Has anyone had this issue or know where the sensor is located?
Thanks,
Nick
Reply
Old Aug 28, 2011 | 09:36 PM
  #2  
C409's Avatar
C409
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2005
Posts: 6,486
Likes: 566
From: Clearwater Florida
Default

..... The gauge sensor is in the passenger side cylinder head between cylinders 6 & 8 ..... its approx $10 new .....
Reply
Old Aug 28, 2011 | 09:41 PM
  #3  
jerseynick's Avatar
jerseynick
Thread Starter
Instructor
15 Year Member
 
Joined: Jun 2004
Posts: 239
Likes: 0
From: Barnegat NJ
Default

Thanks
Reply
Old Aug 29, 2011 | 03:41 AM
  #4  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

Here is a photo of the exact location - FWIW
Attached Images  
Reply
Old Aug 29, 2011 | 07:33 PM
  #5  
ACEXP4's Avatar
ACEXP4
Navigator
 
Joined: Dec 2010
Posts: 9
Likes: 0
From: Simpsonville SC
Default

Dude! I'm in awe at how clean that engine is! How/where can I get schooled on cleaning up my engine compartment?
Reply
Old Aug 30, 2011 | 04:20 AM
  #6  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

The picture shows the coolant temperature sensor for the auxiliary fan in front of the radiator. The CTS for the dash is on the other side of the engine, in the same relative position, i.e., near the engine oil dipstick.

My engine looks like that, too. That's because I scrubbed all the aluminum pieces with 409 in my kitchen sink. I guess you can tell I'm not married... ;-)
Reply
Old Aug 30, 2011 | 05:51 AM
  #7  
mistaben's Avatar
mistaben
Burning Brakes
 
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
Default

Originally Posted by pmihaltian
Here is a photo of the exact location - FWIW
dude. forget how clean your engine is i like your brake fluid reservoir! is that stock? it isn't is it? what did it cost?

my 91's busted right where you have the little mini tube thing to hook the front reservoir to the back one. that is awesome.
Reply
Old Aug 30, 2011 | 07:15 AM
  #8  
PAINTER MAN's Avatar
PAINTER MAN
Burning Brakes
20 Year Member
All Eyes On Me
Liked
Loved
 
Joined: May 2004
Posts: 1,230
Likes: 27
From: Athens Ohio
Default

Originally Posted by mistaben
dude. forget how clean your engine is i like your brake fluid reservoir! is that stock? it isn't is it? what did it cost?

my 91's busted right where you have the little mini tube thing to hook the front reservoir to the back one. that is awesome.
That is the stock reservoir on a 86.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Aug 30, 2011 | 09:36 AM
  #9  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

Originally Posted by Cliff Harris
The picture shows the coolant temperature sensor for the auxiliary fan in front of the radiator. The CTS for the dash is on the other side of the engine, in the same relative position, i.e., near the engine oil dipstick.
You are right - sorry.
Reply
Old Aug 30, 2011 | 10:00 AM
  #10  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

Originally Posted by ACEXP4
Dude! I'm in awe at how clean that engine is! How/where can I get schooled on cleaning up my engine compartment?
Start with a good pressure washer thats not too powerful. BUT, put plastic sheeting on your distributor area, your A/C compressor AND your alternator. Also do not spray the intake manifold and injector areas directly. When you have finished getting most of the grease, oil & debris off, use a high pressure leaf blower to thoroughly blow all excess water off. Next, refinish you valve covers. See attached write-up from Joe C. Then use a very fine brass wire brush to clean all rust areas. This brush will also work wonders on your cast aluminum parts (chassis components, TPI runners, plenum, etc.) Finally, 3M adhesive remover will work on any difficult areas.
Attached Images  
Attached Images
File Type: pdf
Reply
Old Aug 30, 2011 | 10:07 AM
  #11  
pmihaltian's Avatar
pmihaltian
Slingshot
Supporting Lifetime
20 Year Member
 
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Default

Originally Posted by mistaben
dude. forget how clean your engine is i like your brake fluid reservoir! is that stock? it isn't is it? what did it cost?

my 91's busted right where you have the little mini tube thing to hook the front reservoir to the back one. that is awesome.
That is a stock early C4 brake master cylinder. It is a service replacement and if you look closely, you will notice that the aluminum paint that the refurbisher used on it is starting to flake off. I lose points for this when the car is judged. The original master cylinders were raw aluminum and not painted.

You can get a new master cylinder for you Vette at any of the reputable Corvette parts houses.

http://www.ecklerscorvette.com/corve...1989-1991.html
Reply
Old Nov 18, 2019 | 10:12 AM
  #12  
Acrabtree123's Avatar
Acrabtree123
Heel & Toe
 
Joined: Nov 2019
Posts: 17
Likes: 1
Default 86 vet

Originally Posted by Cliff Harris
The picture shows the coolant temperature sensor for the auxiliary fan in front of the radiator. The CTS for the dash is on the other side of the engine, in the same relative position, i.e., near the engine oil dipstick.

My engine looks like that, too. That's because I scrubbed all the aluminum pieces with 409 in my kitchen sink. I guess you can tell I'm not married... ;-)
what does cts stand for ? I'm trying to figure out what sensor is on the left side do you know ?
Reply
Old Nov 18, 2019 | 10:21 AM
  #13  
Acrabtree123's Avatar
Acrabtree123
Heel & Toe
 
Joined: Nov 2019
Posts: 17
Likes: 1
Default 86 vet

Originally Posted by pmihaltian
Here is a photo of the exact location - FWIW
what sensor is this ?,,
Reply
Old Nov 20, 2019 | 04:01 PM
  #14  
3D-Aircrew's Avatar
3D-Aircrew
Melting Slicks
Supporting Lifetime Gold
15 Year Member
Veteran: Navy
 
Joined: Nov 2007
Posts: 2,830
Likes: 147
From: Gainesville FL
Default

Originally Posted by Acrabtree123
what does cts stand for ? I'm trying to figure out what sensor is on the left side do you know ?
Coolant Temperature Sensor
Reply

Get notified of new replies

To 1986 coolant temp gauge inaccurate





All times are GMT -4. The time now is 06:33 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE