Notices
Series I Trouble Shooting This is the place to learn more about or discuss any issues you're having with your RX-8

engine overheating?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 06-20-2009, 12:47 PM
  #1  
zoom zoom!
Thread Starter
 
ronx8's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
engine overheating?

well turns out i got the engine overheating light when i was on the 405 freeway going home from a field trip. i MIGHT have been going 80-85 constant. but anyway it flashed on so i put it in neutral and cruised off the carpool lane and it turned off immediately. i did use search but most people said it was probably coolant level, etc.
i'm an autotragic 2007. idk if this helps but im running hks hipower and ms CAI. no cooling mods done. and it wasn't even hot outside. maybe 85? anyway.. my brother said i shouldn't check my coolant level seeing as though it is pressurized. plus it felt really hot haha. i don't do much work on my car, but it would be nice to find out what the hell the problem is.
Old 06-20-2009, 01:18 PM
  #2  
Registered
iTrader: (1)
 
FazdaRX_8's Avatar
 
Join Date: Jun 2009
Posts: 2,019
Likes: 0
Received 5 Likes on 5 Posts
yeah check the coolant level, and check your oil level, more highway more oil eaton. they are probably both low. where was your needle on your coolent gauge?
Old 06-20-2009, 01:39 PM
  #3  
I8U
Registered
iTrader: (1)
 
I8U's Avatar
 
Join Date: May 2006
Location: Carolina Beach, NC
Posts: 1,934
Likes: 0
Received 0 Likes on 0 Posts
There's a overheating light?
Old 06-20-2009, 01:51 PM
  #4  
Modulated Moderator
iTrader: (3)
 
dannobre's Avatar
 
Join Date: Feb 2004
Location: Smallville
Posts: 13,718
Received 334 Likes on 289 Posts
It's the coolant level light...the most likely thing is a dodgy sensor that is a well known problem.

Either check the level lots and live with it...or buy a new coolant reservoir with a new sensor....I think Mazmart has a good price on them new
Old 06-20-2009, 02:13 PM
  #5  
zoom zoom!
Thread Starter
 
ronx8's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by I8U
There's a overheating light?
i think so. it looks like a box sorta. almost like a radiator.
Old 06-20-2009, 02:17 PM
  #6  
zoom zoom!
Thread Starter
 
ronx8's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by dannobre
It's the coolant level light...the most likely thing is a dodgy sensor that is a well known problem.

Either check the level lots and live with it...or buy a new coolant reservoir with a new sensor....I think Mazmart has a good price on them new
i was hoping it wasn't a bad sensor. covered under warranty?
Old 06-20-2009, 03:18 PM
  #7  
I8U
Registered
iTrader: (1)
 
I8U's Avatar
 
Join Date: May 2006
Location: Carolina Beach, NC
Posts: 1,934
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ronx8
i think so. it looks like a box sorta. almost like a radiator.
That's your low coolant light.
Old 06-20-2009, 03:20 PM
  #8  
Modulated Moderator
iTrader: (3)
 
dannobre's Avatar
 
Join Date: Feb 2004
Location: Smallville
Posts: 13,718
Received 334 Likes on 289 Posts
Originally Posted by ronx8
i was hoping it wasn't a bad sensor. covered under warranty?

If it is still under Bumper to Bumper warranty and it is the sensor...it will be covered

I'd check the coolant level first though
Old 06-20-2009, 03:27 PM
  #9  
zoom zoom!
Thread Starter
 
ronx8's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
coolant was a bit low. so i got some coolant fluid and I'm waiting for the car too cool down. just wondering, but can i mix different engine oils? like as a top off
Old 06-20-2009, 03:29 PM
  #10  
Modulated Moderator
iTrader: (3)
 
dannobre's Avatar
 
Join Date: Feb 2004
Location: Smallville
Posts: 13,718
Received 334 Likes on 289 Posts
Yep...oil is oil really


(As long as it's good oil and it meets the OEM Specs ) Added as a disclaimer
Old 06-20-2009, 03:30 PM
  #11  
zoom zoom!
Thread Starter
 
ronx8's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
haha thanks for the quick reply. thought so.
Old 06-23-2009, 10:25 AM
  #12  
Rotary Gr8tness
 
jrok1313's Avatar
 
Join Date: May 2008
Location: san antonio tx
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
same problem

I am having the same problem with my 8 and all the oil and coolant levels are fine. it only starts to overheat when the a/c is on on a 100 plus degree day. What might my problem be?
Old 06-23-2009, 10:51 AM
  #13  
2005 White GT
iTrader: (1)
 
EDZRIDE's Avatar
 
Join Date: Feb 2006
Location: Spokane Valley, Washington
Posts: 1,210
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by jrok1313
I am having the same problem with my 8 and all the oil and coolant levels are fine. it only starts to overheat when the a/c is on on a 100 plus degree day. What might my problem be?
Make sure your fans (and their related fuses/relays) are working properly.
Old 06-23-2009, 11:04 AM
  #14  
Hot Pit
 
Winning 8's Avatar
 
Join Date: Jul 2005
Location: Castro Valley, CA
Posts: 658
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by jrok1313
I am having the same problem with my 8 and all the oil and coolant levels are fine. it only starts to overheat when the a/c is on on a 100 plus degree day. What might my problem be?
the radiator is not cooling enough for a 100+ with the ac running. may be some part of your radiator is block, should get an aluminum radiator with a bigger core.
Old 06-24-2009, 08:29 AM
  #15  
Rotary Gr8tness
 
jrok1313's Avatar
 
Join Date: May 2008
Location: san antonio tx
Posts: 19
Likes: 0
Received 0 Likes on 0 Posts
thanks for the input guys. Ill try to see if anything is blocking coolant by flushing the radiator and adding purple ice to the radiator to see if itll be a cheap fix before i buy another radiator though that sounds like a good idea to do before the summer is over. Thanks again.
Old 06-24-2009, 08:51 AM
  #16  
Registered Zoom Zoomer
iTrader: (2)
 
Huey52's Avatar
 
Join Date: Apr 2006
Location: New England
Posts: 4,089
Likes: 0
Received 6 Likes on 6 Posts
Make sure your coolant lines aren't "air bound." They occasionally have to be bled of air just as do your hydraulic lines. Of course this is much easier than hydraulic bleeding.
Old 06-24-2009, 07:50 PM
  #17  
B.I.G
iTrader: (4)
 
05rx8mazda's Avatar
 
Join Date: Aug 2007
Location: AT---EIL
Posts: 1,401
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by jrok1313
I am having the same problem with my 8 and all the oil and coolant levels are fine. it only starts to overheat when the a/c is on on a 100 plus degree day. What might my problem be?
mine was over heating in texas due to my front licence plate blocking airflow.. once removed the coolant temp remained stable. FYI
Old 09-17-2014, 08:49 PM
  #18  
New Member
 
Stummoss's Avatar
 
Join Date: Sep 2013
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
I've put in new thermostat and am still getting bubbling. How does one go about bleeding the air out of the cooling system?
Old 09-17-2014, 10:06 PM
  #19  
Charles Bundy
iTrader: (5)
 
Grace_Excel's Avatar
 
Join Date: Jun 2010
Location: Sherman Oaks, CA
Posts: 2,395
Received 7 Likes on 5 Posts
Originally Posted by Stummoss
I've put in new thermostat and am still getting bubbling. How does one go about bleeding the air out of the cooling system?
You just have to run it hard to get the bubbles out. Do you hear swooshing sounds behind the center vents/dash board?
Old 09-18-2014, 02:09 AM
  #20  
Scrappy
iTrader: (1)
 
Legot's Avatar
 
Join Date: Jun 2014
Location: Arizona
Posts: 1,193
Received 7 Likes on 6 Posts
Bleed Coolant System

Originally Posted by Stummoss
I've put in new thermostat and am still getting bubbling. How does one go about bleeding the air out of the cooling system?
I believe dannobre posted this once upon a time, couldn't find the original so I made it less terrible to look at. Don't resurrect old threads to ask the same question dude, for the first time in the history of the internet it annoyed me.

COOLANT SYSTEM AIR BLEEDING
Applicable to all RX-8 Model Years

After performing repairs or modifications of the coolant system, the system must be purged of air. The following procedure will allow any trapped air to escape:

1. Elevate the front end of the vehicle.
*A steep angle will allow air trapped in system to escape easily.

2. Temporarily remove the upper (vertical) throttle body coolant hose.

3. Fill coolant system with proper mix ratio of coolant/water per workshop manual.

4. Start engine and carefully monitor coolant level, topping off as necessary.

5. When coolant begins to flow from throttle body hose, air is bled from system.

6. Carefully attach coolant hose back to throttle body pipe.
*Caution, coolant will be extremely hot!

7. Verify proper coolant level.

8. Check system for leaks.

9. Verify repair.
Old 09-18-2014, 07:26 AM
  #21  
Moder8
iTrader: (1)
 
04Green's Avatar
 
Join Date: Aug 2009
Location: Oviedo, Florida
Posts: 2,578
Received 49 Likes on 31 Posts
For the folks with cooling issues on hot days..

Check out the cooling related DIYs in the Congrats thread. These are all really cheap things that made a huge difference for me.

As for the low coolant light, I just unplugged mine.
Old 09-19-2014, 01:19 AM
  #22  
Registered
 
infiltr_eight's Avatar
 
Join Date: May 2014
Location: Berlin Germany
Posts: 111
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by 04Green
As for the low coolant light, I just unplugged mine.
It's easy to just modify the stock sensor in the coolant tank to avoid the coolant light and still have the low coolant light functionality.

If anyone is intrested in a solution i'll write a small DIY for it.

Greetings
Thomas
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
vapor2
West For Sale/Wanted
11
11-03-2020 03:38 PM
Silver_Excalibur
Series I Tech Garage
23
06-06-2019 07:23 PM
mr. GrandGame
New Member Forum
5
03-23-2016 10:16 AM
cschoeps
RX-8's For Sale/Wanted
0
08-06-2015 12:44 PM
Bomba
RX-8 Discussion
0
07-22-2015 06:46 AM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: engine overheating?



All times are GMT -5. The time now is 07:25 PM.