Notices
New Member Forum A place for new members to get their feet wet

Coolant and water turning brownish

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 11-06-2018, 12:24 AM
  #1  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
Coolant and water turning brownish

I drained what I thought was some orange coolant and in a jug it looks very brown. It doesn't seem oily.

I flushed the system about 7-8 times and the water still won't become clear.



Do I have a coolant seal failure? There is no smoke from exhaust. Only some vapor on start up.

Car starts with no issues hot or cold. I had some ignition issues I fixed, but I think another one came back because my Long term fuel trims are off again. The trims seemed to change after I flushed the system and let the car idle to come up to temp. Prior to flushing, I don't think the car was using coolant, since the reservoir was full.

My 8 lurches sometimes in second gear in higher rpms, like 7k maybe 6k and above. Do I need to clean the SSV? Or is it the new coil that I put in not good. I bought one from O'Reilly's.

My car's vaccum is also around 14 sometimes it hits 15 and dips into 13in/mg

Car has 106k miles.
Old 11-06-2018, 06:39 AM
  #2  
RX-Heaven
iTrader: (6)
 
mazdaverx7's Avatar
 
Join Date: Sep 2008
Location: Vermilion Ohio
Posts: 2,063
Received 167 Likes on 135 Posts
Its time to flush the cooling system. Seems as though its been quite some time since it was done if ever. I have been replacing the coolant in my rotaries every two years or so to ensure that the coolant does not get contaminated or lose its ability to protect against freezing. you are more than likely just seeing rust deposits from the irons collecting in the coolant. This is a sure sign that you need to flush the cooling system.
Old 11-06-2018, 06:43 AM
  #3  
Registered
 
Sydo's Avatar
 
Join Date: Sep 2018
Location: Down Under
Posts: 250
Received 7 Likes on 7 Posts
Originally Posted by mazdaverx7
Its time to flush the cooling system. Seems as though its been quite some time since it was done if ever. I have been replacing the coolant in my rotaries every two years or so to ensure that the coolant does not get contaminated or lose its ability to protect against freezing. you are more than likely just seeing rust deposits from the irons collecting in the coolant. This is a sure sign that you need to flush the cooling system.
7 or 8 times not enough ?
Old 11-06-2018, 06:58 AM
  #4  
What am I doing here?
 
NotAPreppie's Avatar
 
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
Posts: 3,606
Received 649 Likes on 510 Posts
If you want to know if you've got a coolant/combustion chamber seal failure, get a block tester. It's basically a turkey baster and some fluid that will check for combustion gases in the coolant. You've got to use it pretty soon after turning the engine off (otherwise the dissolved exhaust gases will evolve out of solution and the test won't work).

What are you using to flush the cooling system and what is your procedure?
Old 11-06-2018, 09:56 AM
  #5  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
Originally Posted by NotAPreppie
If you want to know if you've got a coolant/combustion chamber seal failure, get a block tester. It's basically a turkey baster and some fluid that will check for combustion gases in the coolant. You've got to use it pretty soon after turning the engine off (otherwise the dissolved exhaust gases will evolve out of solution and the test won't work).

What are you using to flush the cooling system and what is your procedure?
I drained the radiator, then the engine block. Replace the bolt and screw. Fill with distilled water until it stops gurgling air. Turn on car with the radiator cap off. Add more distilled water until full. I watch the coolant temperature on my phone. I put the cap on before it hits 180. Turn on heater on full blast. I let it come up to 202, because I remember reading that the thermostat opens fully at that temp. Let it idle to until 208, then turn off engine. Then i wait for about 1.5 hours before I drain it. If the water still feels really warm when I drained it, then I will wait a bit more before repeating the process.

On the third flush I added prestone flush and cleaner.

I have ran 20 gallons of distilled water so far.


I noticed these little bits on the flush I did last night.

Old 11-06-2018, 10:13 AM
  #6  
What am I doing here?
 
NotAPreppie's Avatar
 
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
Posts: 3,606
Received 649 Likes on 510 Posts
That looks like rust and scale... I don't have a sense of scale (hah, get it?) but I wonder how much restriction you have in your radiator. You may want to pull the radiator and flush it in reverse direction of normal flow. The radiator is aluminum so you should be able to use a garden hose without worrying about corrosion. Though, if you're pulling the radiator, you might as well replace/upgrade it.

Next time you drain it, pull your water pump and see what the impeller looks like as well as the channel going into the front cover. Might also be worthwhile to pull the thermostat housing and have a look there.
Old 11-06-2018, 03:02 PM
  #7  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
I will rent a block tester after work.

I don't think I am overheating. The highest temp I have seen was about 212. Normally it seems to like about 200.

Does anybody know of a good radiator cleaner/flush that is safe for the 8 that I can pick up at O'Reilly's or AutoZone?
Old 11-06-2018, 03:57 PM
  #8  
Registered
 
Sydo's Avatar
 
Join Date: Sep 2018
Location: Down Under
Posts: 250
Received 7 Likes on 7 Posts
What coolant do you use ?
Old 11-06-2018, 05:57 PM
  #9  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
Originally Posted by Sydo
What coolant do you use ?
I just bought this car, it had this orange coolant in it. I was flushing it to put fl-22 in it.


Old 11-06-2018, 06:03 PM
  #10  
Registered
iTrader: (1)
 
Loki's Avatar
 
Join Date: Jun 2009
Location: Montreal
Posts: 7,712
Received 952 Likes on 830 Posts
Looks like someone ran straight water.. for a while. I would definitely check the impeller. Nothing much you can do except keep flushing it until it runs clear. You may want to drive a day or so on each flush to make the best of them. If you jist bought thr car, I'd be looking at your local hidden defect laws.
Old 11-06-2018, 06:10 PM
  #11  
Registered
 
Sydo's Avatar
 
Join Date: Sep 2018
Location: Down Under
Posts: 250
Received 7 Likes on 7 Posts
Get some of this....https://www.rmi25.com/
Old 11-06-2018, 11:36 PM
  #12  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
I performed a block test and it passed. No combustion gases in system. I guess it is really all just rust. It contaminates the water so fast.

Originally Posted by Sydo
Get some of this....https://www.rmi25.com/
Do you know if it is safe for the 8's seals? I read that they are silicone. I don't want something that will eat them up and then have to rebuild, or try a stop leak lol.
Old 11-06-2018, 11:39 PM
  #13  
Registered
Thread Starter
 
Kakashi's Avatar
 
Join Date: Sep 2018
Posts: 67
Received 1 Like on 1 Post
Originally Posted by Loki
Looks like someone ran straight water.. for a while. I would definitely check the impeller. Nothing much you can do except keep flushing it until it runs clear. You may want to drive a day or so on each flush to make the best of them. If you jist bought thr car, I'd be looking at your local hidden defect laws.
It definitely had coolant in it, it smelled sweet for the first few flushes. I'll look up how to remove the water pump so I can check that. Thanks.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RotaryP7
RX-8 Discussion
4
01-31-2014 04:33 PM
ravid_snake
Series I Trouble Shooting
4
06-15-2012 07:57 AM
d j
Series I Tech Garage
39
07-20-2011 02:15 AM
cpo32
Series I Trouble Shooting
1
03-30-2007 02:36 PM
delrmx01
RX-8 Discussion
5
02-20-2006 11:08 AM



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

Quick Reply: Coolant and water turning brownish



All times are GMT -5. The time now is 06:28 AM.