Dirty coolant, just changed thermostat part 2?

This is from a post I made an hour and a half ago, doing a update so other people can see, I found out that those black specs im pretty sure they are not oil I used a paper towel and pulled some out and they didn't smear like oil, almost looked like plastic...and a few of my responses can be scene if you click on my name and read last question before with same title, read those and tell me what you think i should do





Hey everyone me and my buddy where changing the thermostat on my 2001 ford ranger 2.3l truck and realized it was the wrong thermostat so we left it off (coolant was drained with what ever little bit was left in block that didn't drain) couldnt get the thermostat in for 4 days because it was a dealership part and it was saturday. on saturday night and sunday night it never got below 29-25 degrees or so (here in michigan) but he got real worried that the block could crack so we replaced it again with the broken thermostat and put new coolant in and I could still drive it (no heat of course) and its driving fine but it seems like the coolant is a little foamy and dirty after putting bran new coolant in. and i checked the oil and i don't know a whole lot about cars but it had a little bit of white stuff in it only a fingertip's worth and i checked it 7-8 other times and it never showed up again running or not running but it does have a few little bubbles... im worried but it doesn't seem like it got cold enough for the engine to crack and there is no leaks from the thermostat what could this be?



* 1 hour ago

* - 3 days left to answer.



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1 hour ago

Also the thermostat comes tomorrow so i can replace that and add all new coolant... but if you have any advice on what i should do let me know



51 minutes ago

I just went out to look at coolant and you can see very few tiny black spots that almost look like plastic to be honest, not sure if thats oil or not, but the coolant is bright green still just not clear. there where about 10 little specs of black
Dirty coolant, just changed thermostat part 2?
Doesn't sound like anything to worry about. What you need to do though is once you get the new thermostat in open the drains on your radiator put a water hose int the radiator fill and flush the whole system out. It will take a while especially it being as cold as it is. But you need to flush the system. There are some things you can buy to flush it with but reg tap water works fine. Just flush it until anything coming out of the drains is clear. Also, you will need to let the engine run while flushing.... Then shut off the engine let all the water drain out. Then add a jug of anti freeze and fill the rest with water. Check the rating you get with a tester. Dont want to be under protected. The black dots you were speaking of could be from lots of things. Not to worry at this point. Just need to replace therm and flush system. Should be good to go!