Go Back   LS1TECH > WELCOME TO LS1TECH > General LSX Automobile Discussion
Sign in using an external account
Register Forgot Password?
Search

General LSX Automobile Discussion
Non-technical LSX related topics.
Sponsored by
Stainless Headers
Click Here

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

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, at no cost, 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, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 07-19-2010, 01:05 PM   #1
10 Second Club
Garage is empty, add now
 
Trader Rating: 1
Join Date: Apr 2009
Location: Jonesboro, Arkansas
Posts: 135
Default brown foamy antifreeze

I just recently finished putting in a 4.8 in my 84 cutlass. I have put about 300 miles on the swap in the last 3 weeks and this morning I was checking over some things and noticed foamy brown antifreeze in the radiator. I checked the oil and it is still just as clear as when I put it in before starting the motor. The motor came from a local junkyard so I assume it had been sitting for awhile. I did not ever pull the heads off the motor as it was clean on the outside and the bottom end looked good (spotless inside the valve covers and oil pan as well as cross hatching on the cylinder walls). Could this brown foam be from not flushing the motor before filling the system? The motor had some coolant in it that ran out while moving it. Could old antifreeze leave rust or residue inside the motor that flushed out once it started?
b_evans06 is offline   Reply With Quote
Old 07-19-2010, 01:07 PM   #2
TECH Senior Member
Garage is empty, add now
 
ss.slp.ls1's Avatar
 
Trader Rating: 36
Join Date: Jan 2008
Location: Orange County, CA
Posts: 7,535
Send a message via AIM to ss.slp.ls1
Default

Quote:
Originally Posted by b_evans06 View Post
I just recently finished putting in a 4.8 in my 84 cutlass. I have put about 300 miles on the swap in the last 3 weeks and this morning I was checking over some things and noticed foamy brown antifreeze in the radiator. I checked the oil and it is still just as clear as when I put it in before starting the motor. The motor came from a local junkyard so I assume it had been sitting for awhile. I did not ever pull the heads off the motor as it was clean on the outside and the bottom end looked good (spotless inside the valve covers and oil pan as well as cross hatching on the cylinder walls). Could this brown foam be from not flushing the motor before filling the system? The motor had some coolant in it that ran out while moving it. Could old antifreeze leave rust or residue inside the motor that flushed out once it started?
If the oil looks good and you are not loosing pressure in your cooling system, I'd do a complete cooling system flush and fill it up with fresh coolant/distilled water and call it a day.
__________________
'98 Z28 M6 silver hardtop, intake, full exhaust, gears.
ss.slp.ls1 is offline   Reply With Quote
Old 07-19-2010, 01:16 PM   #3
10 Second Club
Garage is empty, add now
 
Trader Rating: 1
Join Date: Apr 2009
Location: Jonesboro, Arkansas
Posts: 135
Default

The car hadn't been started in a few days and when I took off the radiator cap I could hear it letting off pressure so I assume the system ok as far as that goes and the oil looks just like it did when I poured it in the motor.
b_evans06 is offline   Reply With Quote
Old 07-19-2010, 08:47 PM   #4
Launching!
Garage is empty, add now
 
greenturtle05's Avatar
 
Trader Rating: 6
Join Date: Dec 2009
Location: Georgetown, South Carolina
Posts: 269
Send a message via Yahoo to greenturtle05
Default

flush the entire system and put some new coolant in and you should be good. Did you have a leak on your previous motor?
__________________
05 silverado cc~5.3~lt's w/ory~tru trac~4.11~tt3000~hd2~vette servo~dyno tuned~magnaflow~ muffler~Totaled 9-24-11
07 Sierra CC~5.3~Stock
95 chevy Impala~ ls swap
greenturtle05 is offline   Reply With Quote
Old 07-19-2010, 09:05 PM   #5
10 Second Club
Garage is empty, add now
 
Trader Rating: 1
Join Date: Apr 2009
Location: Jonesboro, Arkansas
Posts: 135
Default

I bought the car as a roller that didn't have a motor or radiator. The cooling system is all new except the water pump.
b_evans06 is offline   Reply With Quote
Old 07-19-2010, 10:29 PM   #6
LS1Tech Administrator
1998 Chevrolet Camaro
My Garage
 
RPM WS6's Avatar
 
Trader Rating: 3
Join Date: Nov 2001
Location: Lincolnwood, IL Member: #317
Posts: 19,935
Default

Quote:
Originally Posted by b_evans06 View Post
I bought the car as a roller that didn't have a motor or radiator. The cooling system is all new except the water pump.
What about the heater core? Original to the car? Maybe there was junk in there.

Flush the system and keep an eye on it. Hope for the best.
__________________
1998 Camaro Z28 | 1971 Nova SS-350



Previous LSx Vehicles:
2002 Camaro Z28 | 2000 Trans Am WS6 | 1999 Camaro Z28
RPM WS6 is offline   Reply With Quote
Old 07-27-2010, 02:54 PM   #7
12 Second Club
Garage is empty, add now
 
shaun's Avatar
 
Trader Rating: 0
Join Date: Nov 2005
Posts: 1,850
Default

Quote:
Originally Posted by RPM WS6 View Post
What about the heater core? Original to the car? Maybe there was junk in there.

Flush the system and keep an eye on it. Hope for the best.
this could be the case old crap in the core got broken loose and went through the system.
i would flush it out real well dont want crud going in the heads and block.
__________________
a few bolt ons and some custom touches
www.fquick.com/shaunls1
shaun is offline   Reply With Quote
Old 07-27-2010, 03:26 PM   #8
Launching!
Garage is empty, add now
 
Canbarelygo's Avatar
 
Trader Rating: 0
Join Date: Feb 2010
Location: Shawnee, OK
Posts: 279
Default

what ive seen of this is that this is what happens when you mix red and green antifreeze. when you mix the kinds that arent mixable it turns into this nasty nonsense that looks like the inside of a brownie lol.

umm if that what this is then when water hits it, it should just kinda "melt" and flow away. if this stuff is your problem then take the radiator out and flush it out for about 10-15-20 mins with a water hose (depending how big of a **** you are and it should be good. then while radiator is out just run a water hose through the block for 20 or so minutes maybe more (again depending on how big of a **** you are) and you should be good to go man.

like i said try runnin water on the foamy stuff and if it kinda "melts" and flows away then thats your problem. hope this helps
__________________

99 z28 a4
neighbors think its too loud, maybe i should get mufflers....

Quote:
Originally Posted by Midnite Magic View Post
Spray that ***** out of the hole
Canbarelygo is offline   Reply With Quote
Old 07-28-2010, 12:08 AM   #9
Douchebag On The Tree
Garage is empty, add now
 
justin455's Avatar
 
Trader Rating: 0
Join Date: Nov 2009
Location: Indianapolis, IN
Posts: 1,083
Default

Might this be what you are speaking of?

Click the image to open in full size.

Everyone is right. Flush it well. This is dexcool that has been left in too long and has either come into contact with good old green stuff or air. Once this happens it's actually a corrosive substance that eats all the good little plastic parts (namely intakes) that GM uses. It wasn't as maintenance free as GM advertised.

Best bet is to flush it and use green. You can use dexcool again with no problems as long as you keep an eye on it, but I prefer green anyway.
__________________
Quote:
Originally Posted by V-seriesTech View Post
After you hit 200mph you go and get yourself a BJ.
justin455 is online now   Reply With Quote
Old 07-28-2010, 12:08 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
antifreeze, brown, chocolate, colored, coolant, crud, fluid, foam, foaming, foamy, green, oil, orange, radiator, stuff


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 Off
Pingbacks are On
Refbacks are Off




All times are GMT -5. The time now is 08:32 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details