Go Back   Honda-Tech > Honda and Acura Model-Specific Technical Forums > Acura Integra
Sign in using an external account
Register Forgot Password?
Search


Welcome to Honda-Tech!
Welcome to Honda-Tech.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Honda-Tech community today!


Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread
Old 11-19-2010, 11:46 AM   #1
Honda-Tech Member
Garage is empty, add now
 
PolePosition08's Avatar
 
Join Date: Sep 2005
Location: Memphis, TN, 38135
Posts: 27
iTrader Rating: (0)
Send a message via AIM to PolePosition08
Default Coolant flushed, now temperature gauge not working?

I have an LS in my Civic and I just flushed the coolant and changed the radiator hoses since it hasn't been done in a while. I did the flush the proper way (draining from radiator and from engine drain bolt) and flushed a gallon of distilled water through it before filling it with Honda Type 2 coolant.

Everything seemed ok at first. No leaks or anything...but then I noticed that as the motor ran up to operating temperature (upper hose hot and valve cover hot to the touch), the temperature gauge in the car still read cold and the radiator fan never came on, even after letting it idle for 10 minutes, and then taking it for a 10 minute drive. I noticed that the lower radiator hose was much cooler than the upper radiator hose (not sure if this is abnormal or not but just thought I'd mention as many details as I can)

What could be causing this?

*See my latest post for solution

Last edited by PolePosition08; 12-01-2010 at 07:12 PM.
PolePosition08 is offline   Reply With Quote
Old 11-19-2010, 12:14 PM   #2
Technical Hero
Garage is empty, add now
 
HondaPartsHero's Avatar
 
Join Date: May 2002
Location: Charlotte, NC, 28227
Posts: 8,484
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

Did you bleed the system of air pockets?
__________________
OBD1/2 SOHC/DOHC VTEC HARNESS
MINI ME SUBHARNESS
02 EXTENSION HARNESS
Hondapartshero.net
HondaPartsHero is offline   Reply With Quote
Old 11-19-2010, 01:05 PM   #3
Honda-Tech Member
Garage is empty, add now
 
PolePosition08's Avatar
 
Join Date: Sep 2005
Location: Memphis, TN, 38135
Posts: 27
iTrader Rating: (0)
Send a message via AIM to PolePosition08
Default Re: Coolant flushed, now temperature gauge not working?

Quote:
Originally Posted by HondaPartsHero View Post
Did you bleed the system of air pockets?
I let it run for a while without the radiator cap on. I think it was a sufficient amount of time for the air to have all bled out. I can try letting it run and open the bleeder valve if you think that might help.
PolePosition08 is offline   Reply With Quote
Old 11-19-2010, 04:25 PM   #4
Honda-Tech Member
1999 Honda Civic
 
Join Date: Aug 2009
Posts: 31
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

http://www.summitracing.com/parts/LIL-24610
slidelljosh is offline   Reply With Quote
Old 11-19-2010, 07:09 PM   #5
Honda-Tech Member
Garage is empty, add now
 
Join Date: Oct 2009
Location: 727, Florida
Posts: 641
iTrader Rating: (1)
v8killerb18
Default Re: Coolant flushed, now temperature gauge not working?

did you turn on the heater when filling with coolant? have you check to see if the sensor on the head came unpluged? maybe try another sensor.
__________________
Race-Spec Trusted and Proven Motorsport Wiring 67mm Aem series 2 Liberty Face plate trans on that 9 second quest.
AllShowNoGo727 is offline   Reply With Quote
Old 11-20-2010, 04:36 AM   #6
Honda-Tech Member
Garage is empty, add now
 
PolePosition08's Avatar
 
Join Date: Sep 2005
Location: Memphis, TN, 38135
Posts: 27
iTrader Rating: (0)
Send a message via AIM to PolePosition08
Default Re: Coolant flushed, now temperature gauge not working?

Quote:
Originally Posted by AllShowNoGo727 View Post
did you turn on the heater when filling with coolant? have you check to see if the sensor on the head came unpluged? maybe try another sensor.
Yea had heater on the whole time so it would circulate...the motor was running for 20 minutes, that should have been plenty of time to get things heated up. I guess I'll just replace the thermostat and sensor since doesn't seem to be any definitive answer.
PolePosition08 is offline   Reply With Quote
Old 11-20-2010, 09:34 AM   #7
Honda-Tech Member
Garage is empty, add now
 
follie gatts's Avatar
 
Join Date: Feb 2006
Location: 717
Posts: 700
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

if the temp sensor is bad the gauge would have behaved that way before the flush. it's a 13$ part from honda, so you can't lose very badly replacing it.
__________________
2000 DC4, 1996 DB7 CEL Trouble Codes

http://g3integra.com/ruckus
follie gatts is offline   Reply With Quote
Old 11-20-2010, 09:54 AM   #8
Honda-Tech Member
Garage is empty, add now
 
Join Date: Jul 2010
Posts: 3,578
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

you can test the sending unit out of the vehicle by measuring it's resistance cold, then using a hair dryer and measuring it hot. see if it falls within spec.
__________________
the richest ones are not those who have the most, but those who need the least

-bernhausen specialty automotive- BC's diesel truck headquarters
el crapitan is offline   Reply With Quote
Old 11-20-2010, 09:57 AM   #9
Technical Hero
Garage is empty, add now
 
HondaPartsHero's Avatar
 
Join Date: May 2002
Location: Charlotte, NC, 28227
Posts: 8,484
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

Quote:
Originally Posted by PolePosition08 View Post
I let it run for a while without the radiator cap on. I think it was a sufficient amount of time for the air to have all bled out. I can try letting it run and open the bleeder valve if you think that might help.
With the car off and cold crack open the bleeder valve and put fluid in the radiator until only water comes out of the bleeder valve, then close the valve. Then start the car up and turn the heater control to hot (the heat doesn't have to be blowing). Do this with the radiator cap off. Allow the radiator fan to cut on twice, you can rev the car to 2k RPM's while doing this to speed up the process. Fill as necessary.
__________________
OBD1/2 SOHC/DOHC VTEC HARNESS
MINI ME SUBHARNESS
02 EXTENSION HARNESS
Hondapartshero.net
HondaPartsHero is offline   Reply With Quote
Old 11-20-2010, 10:18 AM   #10
Honda-Tech Member
Garage is empty, add now
 
Join Date: Jul 2010
Posts: 3,578
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

i don't understand why people are pointing towards bleeding the system. air in the system will not cause his temp gauge to stay at the bottom
__________________
the richest ones are not those who have the most, but those who need the least

-bernhausen specialty automotive- BC's diesel truck headquarters
el crapitan is offline   Reply With Quote
Old 12-01-2010, 02:30 PM   #11
Honda-Tech Member
Garage is empty, add now
 
PolePosition08's Avatar
 
Join Date: Sep 2005
Location: Memphis, TN, 38135
Posts: 27
iTrader Rating: (0)
Send a message via AIM to PolePosition08
Default Re: Coolant flushed, now temperature gauge not working?

After replacing the thermostat and coolant temperature sensor and rebleeding the system, the problem still persisted. I then proceeded to inspect the temperature sender switch (on the block, to the right of the coolant temperature sensor) and noticed the plug was all gunked with oil. I went ahead and bought a new sender switch (this goes to the gauge, this is not the switch that sends the signal to the fans) since it was only $6 and also cleaned out the harness plug. This fixed the problem.

Posting this in case anyone in the future searches and has the same problem.

FYI on the 3 different coolant sensors, again for the sake of those that may search in the future.

Coolant temperature switch - this is the large sensor that is located in the thermostat housing. When the thermostat is open, coolant flows past this sensor. If it is warm enough, the sensor will send a signal to your radiator fans to kick on. If your motor is running hot and the fans are not coming on, this might be the sensor to replace. The next logical choice would be to also inspect the fans themselves for failure.

Coolant temperature sensor - this is the larger of the two sensors located under the distributor (closest to the firewall and has 2 wires). This is the sensor that sends your actual temperature readings to the ECU. It is the temperature from this sensor that controls your idle speed. Cold = high idle and more fuel. If you are getting bad gas mileage and your gauge reads normal temps, then this is the sensor to replace.

Temperature sender switch - this is the smaller of the two sensors located under the distributor (closest to the radiator and has 1 wire). This sensor sends the temperature reading to your gauge cluster. If everything in your coolant system is operating normally but your gauge is either always reading hot or always reading cold or has other erratic behavior, this is the sensor to replace.
PolePosition08 is offline   Reply With Quote
Old 12-01-2010, 07:33 PM   #12
Honda-Tech Member
1995 Acura Integra
 
Join Date: Feb 2010
Posts: 11
iTrader Rating: (0)
Default Re: Coolant flushed, now temperature gauge not working?

After you add coolant make sure you "massage" your upper and lower radiator hoses until there are no air bubbles popping up from your radiator fill hole.
Matt2458 is offline   Reply With Quote
 
 
 
submit to reddit
Reply

Tags
bleed, car, cold, coming, coolant, flush, gauge, guage, hair, hot, obd1, radiator, reads, temperature, vtec, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 12:25 AM.



2014 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details