Welcome to the North American Subaru Impreza Owners Club Friday August 29, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, 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 free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-30-2004, 03:01 PM   #1
gpd323
Scooby Specialist
 
Member#: 9878
Join Date: Sep 2001
Location: Beautiful Downtown Spanaway!
Vehicle:
2002 WRX/GTX
WRX Wagon/Mazda GTX

Default Radiator Fluid and overflow tank sludge

I changed the radiator fluid today and as I filled up the top fill tank I squeezed the upper rad hose like a basting bulb to get all the air out of the system Worked great.

Then I removed the overflow tank to dump the old fluid out of it and to my surpise there was a 2" layer of orange sludge at the very bottom on the overflow tank. And for the early WRX's that had the paint peeling off the inside of the radiator cap tank then you will find quite a bit of peeled paint mixed in the sludge. The sludge is quite remarkable. I wonder where it all came from?

Just FYI is all.

Greg D
* Registered users of the site do not see these ads.
gpd323 is offline   Reply With Quote
Old 01-31-2004, 01:10 AM   #2
cvalle-sd
Scooby Specialist
 
Member#: 420
Join Date: Oct 1999
Chapter/Region: SCIC
Location: The LBC, CA, USA
Vehicle:
2001 Cr-V
Silver

Default

have you ever put anything but coolant or water in? Stop leak? ever added one brand of coolant to another?

Orange sludge sounds pretty freaky.
cvalle-sd is offline   Reply With Quote
Old 01-31-2004, 09:58 AM   #3
gpd323
Scooby Specialist
 
Member#: 9878
Join Date: Sep 2001
Location: Beautiful Downtown Spanaway!
Vehicle:
2002 WRX/GTX
WRX Wagon/Mazda GTX

Default

It was the stock fluid from the factory. I did add Redline water wetter but that was it. I recall early on that when I checked the rad fluid the upper tank was all orange and this orange stuff was floating on the top of the fluid. I mentioned this years ago when I bought the WRX. Others seemed to experience the same coolant issues to include the paint on the inside of the tank top where the rad cap is peeling off and heading into the coolant passages. I had taken my tank top off and removed what was left of the paint.
The sludge is really weird, I wonder if all the low lying coolant passages and areas are packed with this stuff?

But whan I changed the rad fluid it was clear and not orange discolored.

Greg D.
gpd323 is offline   Reply With Quote
Old 01-31-2004, 01:51 PM   #4
cvalle-sd
Scooby Specialist
 
Member#: 420
Join Date: Oct 1999
Chapter/Region: SCIC
Location: The LBC, CA, USA
Vehicle:
2001 Cr-V
Silver

Default

That's a poser...To be safe, I'd assume that at least some of that stuff is still in the system. An occasional flush is a good idea anyway. I'm about to do it for my ailing EJ25. You could just take it in to a mechanic and have them pump it out, but I'm going cheap, and using that Prestone stuff.
cvalle-sd is offline   Reply With Quote
Old 02-01-2004, 10:12 PM   #5
Raptor75104
Scooby Newbie
 
Member#: 52363
Join Date: Jan 2004
Location: Cedar Hill, TX
Vehicle:
2009 Legacy GT
Ruby Red Pearl

Default

A couple of things on this subject, if I may...

1st - My humble opinion on the orange gunk is that it's sediment from mixing tap water with the coolant (which most everyone does). Why it turns orange? Dunno. Why it settles in your reservoir? Because that's where coolant sits and it has a chance to. It never circulates there. Nasty isn't it? As you may or may not be aware, coolant is sometimes pressured into the reservoir when the system is hot and then sometimes it's sucked out of the reservoir and back into the radiator when the system cools, to sort of "top things off." Your cleaning out your reservoir is an excellent idea if you don't want that crap getting sucked back into the radiator.

2nd - I have seen quite a few times where someone has not maintained their cooling system and, after 80,000 miles, they want a flush. Generally speaking, this is really risky. After this long, not having changed out the fluid, there are deposits in the cooling system that aid in sealing it. Flushing washes all of that out. Leaks will occur as the seals/gaskets have aged and worn. This also holds true for automatic transmissions and laquers that have built up (but that's another post). If coolant changes are performed routinely, then flushes aren't really necessary unless you just want to. But if someone is working on 70,000 miles and hasn't changed their coolant, then draining and refilling is ok, but flushing is not recommended.

Also, with coolant, don't buy into the "extended life" stuff thinking you won't have to change it out as often. Coolant has a shelf life of 18 month and will go a while longer. Why would it last longer under the duress of being in an engine? I'd recommend draining and refilling every two years or 24,000 miles, whichever comes first. 5 years or 150,000 miles is a bunch of hooey. The additives that make coolant what it is have done worn out.

Hope this helps.

Raptor
Raptor75104 is offline   Reply With Quote
Old 02-01-2004, 10:20 PM   #6
Tex-WReX
Scooby Specialist
 
Member#: 7107
Join Date: Jun 2001
Chapter/Region: TXIC
Location: Pearland
Vehicle:
2014 Mustang GT
White

Default

My 2 cents. I have an 02, and the magical black paint chips. I did my second change today (lots of miles, @ 65k miles ). Lots of sediment and black chips in the resevoir. Takes all of a min to pull it out and give it a good flush. I have always used non-silicate anit freeze and demineralized water. Hopefully, @ the 90k mile change, the sediment will be at a min. I also use Royal Purple -Purple Ice (similar to water wetter). Hope this helps as well.
Tex-WReX is offline   Reply With Quote
Old 02-02-2004, 09:29 AM   #7
gpd323
Scooby Specialist
 
Member#: 9878
Join Date: Sep 2001
Location: Beautiful Downtown Spanaway!
Vehicle:
2002 WRX/GTX
WRX Wagon/Mazda GTX

Default

Good ideas and suggestions.

I too only use distilled water and fresh antifreeze.

The sludge was created with the OEM factory fluid which was due for its 1st change. Not any aftermarket fluid.

The paint in the sludge is from the 1st allocation of WRX's that had the painted black cover where the radiator cap is. Later 2002's came w/unpainted covers.

Greg Downing
gpd323 is offline   Reply With Quote
Old 02-02-2004, 01:32 PM   #8
KanosWRX
Scooby Specialist
 
Member#: 17904
Join Date: Apr 2002
Chapter/Region: MAIC
Location: NOVA -> HI -> NOVA
Vehicle:
010 STI
Black

Default

This was talked about a lot in another thread. I actually had the same problem, the paint was coming off the resevoir tank and you could see stuff floating around in there. I took it to a dealer and they replaced it with the 03, non painted resevoir tank under warranty, took about a week for the part to come in, then 1 hour for them to replace it. Now I just need to flush the coolant, will probably do it this spring.
KanosWRX is offline   Reply With Quote
Old 02-03-2004, 05:05 AM   #9
armand1
Scooby Guru
 
Member#: 10309
Join Date: Sep 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
'02 OBS 2-tone!
'95 Montego Miata

Default

Quote:
Originally posted by gpd323
It was the stock fluid from the factory. I did add Redline water wetter but that was it. ...
Water Wetter (and equivalents) have been associated with some sludging in the overflow tank.
It also helps to keep the overflow tank always up to Full, so the liquid inside doesn't get too concentrated/dried down.
armand1 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 STI Radiator with both fans, overflow tank, lines and mounting - complete OEM Royal Motors Engine/Power/Exhaust 23 04-17-2009 03:06 PM
WTB-radiator top mounts and overflow tank-06 STI toomuch NWIC Private Classifieds 2 09-19-2008 02:38 PM
Aluminum Radiator overflow tank djerickd Private 'Wanted' Classifieds 13 11-24-2007 01:55 AM
what radiator overflow tank to use with Hyperflow FMIC ? billy boi Factory 2.0L Turbo Powertrain 7 04-21-2005 07:08 PM
Small radiator overflow tank american GC8 ? bigbird Normally Aspirated with bolt-on Forced Induction Powertrain 8 05-02-2003 01:58 PM


All times are GMT -4. The time now is 04:14 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.