thats crazy... 
Junk In My Radiator
Junk In My Radiator My car has been running hotter lately and getting upwards of 230º even with the 160º thermostat. I figured the thermo had just gone bad until I investigated further. I found that the coolant reservoir had a crack in the top of it, possible from the weight of the Optina battery, but what shocked me the most was when I pulled it off and dumped it out and what came out looked a lot like dog ****. I'm wondering what could have happened here and how serious this is. I'm going to go get it flushed out I guess, but will that be enough and is there more going on here than just the radiator. Here is what came out:
Yuck. That's some nasty looking stuff. Glad you found the problem.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
looks like typical effects from Dexcool crap... mine did the same thing for the longest time. I'd flush, put in fresh Dexcool, flush again, more Dexcool, etc... after a lot of research I ended up finding out that the Dexcool was the culprit. Put in some yellow/green Prestone extended life and haven't had a problem since. I check it often, and never get the "jelly" substance that I was getting from the Dexcool. That stuff is complete crap...
looks like typical effects from Dexcool crap... mine did the same thing for the longest time. I'd flush, put in fresh Dexcool, flush again, more Dexcool, etc... after a lot of research I ended up finding out that the Dexcool was the culprit. Put in some yellow/green Prestone extended life and haven't had a problem since. I check it often, and never get the "jelly" substance that I was getting from the Dexcool. That stuff is complete crap...
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TECH Regular
Joined: May 2004
Posts: 474
Likes: 0
From: chicago
looks familiar... yesterday i managed to squeeze this out of my overflow tube while flushing my system due to a faulty power steering cooler. the stuff is so sticky that putting air to the tube wouldnt shoot it out.
http://pics.montypics.com/badhoopty/...6_img_4195.jpg
i too had a cracked overflow tank that i replaced about 3 years ago. i didnt notice any of this stuff in there, but then again i wasnt looking...
rest of my cooling system looks like its in very good shape besides being recently subjected to about 30 or so miles of power steering fluid contamination. i'm completely ocd when it comes to maintaining this car, and i know for a fact that in the 6 years i've had the car that no green stuff has been added and it has never been ran with low coolant.
i'm thinking its just typical dexcool voodoo from being exposed to air and constant wet/dry cycles in the overflow.
http://pics.montypics.com/badhoopty/...6_img_4195.jpg
i too had a cracked overflow tank that i replaced about 3 years ago. i didnt notice any of this stuff in there, but then again i wasnt looking...
rest of my cooling system looks like its in very good shape besides being recently subjected to about 30 or so miles of power steering fluid contamination. i'm completely ocd when it comes to maintaining this car, and i know for a fact that in the 6 years i've had the car that no green stuff has been added and it has never been ran with low coolant.
i'm thinking its just typical dexcool voodoo from being exposed to air and constant wet/dry cycles in the overflow.
TECH Enthusiast
Joined: Feb 2005
Posts: 734
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From: south jersey. again
TECH Resident
Joined: Jul 2009
Posts: 772
Likes: 0
From: Bahrain
I found this similar crap stuck to my radiator cap when I opened it a few weeks ago at the start of my cam swap. And this is a new radiator, hardly 1000 miles on it! I am flushing it and flushing the block as well.
TECH Addict
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Flush it three times per the service guidelines - allow the thermostat to open each time then refill with dexcool and clean drinkable water. You do not need distilled water with dexcool, just clean water - I use bottled water in the gallon jugs.
It is always a better thing to put Distilled water into a radiator no matter what coolant you are using. The reaction you worry about is between the radiator metals and the water, not the water and the coolant.
