What does this conenctor do on a 87´?
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
What does this conenctor do on a 87´?
Well in relation to my coolant overheat problem (se other thread), i have found the connector to be broken.
What function does this have on a 87?
i have been told it differs fronm 85 to 88?
What function does this have on a 87?
i have been told it differs fronm 85 to 88?
Burning Brakes
Joined: Jul 2003
Posts: 904
Likes: 36
From: Santa Cruz CA
sensor
That is the coolant temp sensor for your extra boost fan in front of the radiator. There are three coolant temp sensors on the 87 L98. That one, then one at the front of the manifold that sends its readings right to the ECM and a third on the passenger side also. The one you are looking is the one commonly spliced into so that it turns on both the front and back fans so you can have them both come on at 200 and go off at 180. This is because the ECM will normally turn on the back fan at 230 degrees which is great for emissions but bad for performance. Mid America makes the kit to replace that sensor you have in the picture with the lower temp one and the wires to splice the the other wires so it controls both fans. Hope this helps. I don't recall if the kit comes with a new connector end though.
Last edited by Jaxian; Nov 14, 2006 at 04:20 PM.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
This would not prevent the main fan from coming on. 87's are very tough to fill. Air always gets trapped in the motor, causing the problems you are having. You need to cool the car, elevate the front, run engine with cap off till it causes the thermostat to open, rev the motor to 2000 rpm's and have a helper fill the system, and pop the cap on while the revs are up. After the system is "packed" watch the guage and allow car to idle up to 225 degrees. Fan should come on. If not, let the car cool, and it will suck coolant in from the overflow tank. Start the car and repeat the warm up process. It is a pain in the nutz sometimes.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by Pete K
This would not prevent the main fan from coming on. 87's are very tough to fill. Air always gets trapped in the motor, causing the problems you are having. You need to cool the car, elevate the front, run engine with cap off till it causes the thermostat to open, rev the motor to 2000 rpm's and have a helper fill the system, and pop the cap on while the revs are up. After the system is "packed" watch the guage and allow car to idle up to 225 degrees. Fan should come on. If not, let the car cool, and it will suck coolant in from the overflow tank. Start the car and repeat the warm up process. It is a pain in the nutz sometimes.
ok...I will try and pack the system, thanks
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
The knock sensor connector is the same as the aux fan switch connector. Your odds of finding one in Denmark, just doubled 
Here is some info on the main fan operation, if you don't have this already.
http://members.shaw.ca/corvette86/Co...%20Control.pdf
Here is some info on the main fan operation, if you don't have this already.
http://members.shaw.ca/corvette86/Co...%20Control.pdf
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Pro
Joined: Apr 2006
Posts: 747
Likes: 0
From: Perth Western Australia
Originally Posted by Pete K
This would not prevent the main fan from coming on. 87's are very tough to fill. Air always gets trapped in the motor, causing the problems you are having. You need to cool the car, elevate the front, run engine with cap off till it causes the thermostat to open, rev the motor to 2000 rpm's and have a helper fill the system, and pop the cap on while the revs are up. After the system is "packed" watch the guage and allow car to idle up to 225 degrees. Fan should come on. If not, let the car cool, and it will suck coolant in from the overflow tank. Start the car and repeat the warm up process. It is a pain in the nutz sometimes.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 2,295
Likes: 14
From: Grand Sport #82
Originally Posted by AGENT 86
The knock sensor connector is the same as the aux fan switch connector. Your odds of finding one in Denmark, just doubled
Here is some info on the main fan operation, if you don't have this already.
http://members.shaw.ca/corvette86/Co...%20Control.pdf
Here is some info on the main fan operation, if you don't have this already.
http://members.shaw.ca/corvette86/Co...%20Control.pdf
Well i got it all working now, it was a loose connector
Thanks for all the info!
Safety Car
Joined: Aug 1999
Posts: 4,931
Likes: 3
From: Fort Lauderdale FL
Originally Posted by Lars87
Well in relation to my coolant overheat problem (se other thread), i have found the connector to be broken.
What function does this have on a 87?
i have been told it differs fronm 85 to 88?
What function does this have on a 87?
i have been told it differs fronm 85 to 88?
