My car was running a little warm today so I open the cap on the radiator and there was a muddy substance mixed in there. I am not sure what this is. The same stuff was there about 7-8 months ago and a freind and I flushed it out. What could this be and why is it in there again.

 

Sent you a PM.
I am also thinking that the heater core could be a problem. I understand that a few guys have had a problem and if you have to pull it out, it is a PITA.

It could be your mix is not 50/50?

Jim

 

I had the same thing in my overflow resivoir when I flushed my system a while back. Take out the battery and take out the overflow acnister and flush it out. www.bfanker.badz28.com/fbody/guides.htm
he has something on flushing it.

 

i noticed the same thing when i flushed my system out last weekend. i would also like to know what this could be! almost looks like it is rust??!?!

 

Thanks for the info guys, but that link does not work.

 

Sorry heres the right link
http://www.bfranker.badz28.com/fbody/coolant.htm

I had tons of crap in mine(the overflow container)
I just drained it filled it up with water, started it ran it for a min or two and drained it. Then filled it up again. No proplems since and its been runnig cooler.

 

I would have to suggest just to make sure you do a thorough flush of the cooling system, fill up with pure water, run to temperature, turn off car, drain again, continue until fluids come out clear. Fill with 50/50 dexcool. This stuff gets grimy if it's dirty, try that out and see what happens guys.

 

Thats what I had to do a few months back... the temp gauge was sitting about 20 degree's higher than normal for a couple of weeks. Finally got around to doing a flush of the cooling system with distilled water... cycled it a couple of times to make sure everything was clean then filled it back up with a 50/50 mix of coolant and distilled water. The temps been sitting just below 180 every since.

 

Thanks for the info guys, I am off on saturday and I am gonna flush it then.