I disagree. I have seen what Dexcool mixed with Green Coolant in a coolant system looks like. It turns into an orange sludge. This occurs more rapidly if air is also introduced into the system. It almost cost me a couple thousand in repairs and replacement parts for the coolant system. It was also most likely the cause of a blown head gasket I had. Ask someone who services coolant systems for a living what they think of Dexcool. There is a new type of coolant that is clear in color. This type is said to be safe to mix.

 

It's the air introduction, not the mixing. A tight system is not going to have any problem.

 

werd.......the difference is the bisulfates

 

Reads like it's still not a good idea to mix the two...

 

Not my statement.

Still, I don't mix coolants. Unless one or the other is not available and it is an emergency, most people never will.

 

ok so yesterday i drained the oil and it looks fine doesnt look to have water or coolant in it whats another way to tell if i have a blown head gasket other than compression test?

 

If you were burning coolant, a plug (or plugs) would be clean looking, you would see white vapor from the exhaust and your coolant level would be going down. You can also buy a kit to test for the presence of exhaust vapors in the coolant. If you have none of these symptoms and did not have the milky substance until you introduced it with the flush, I would say you are chasing your tail.

 

short of pulling the head and inspecting a compression or leak down test is the only way to know (bad rings would show on those). That what you are goign to need to do.

 

I think its the excess milky flush stuff you used. Because I just used some milky looking anti rust this weakend and now my coolent looks milky.

 

One other way would be to have an oil analysis done. They can check for traces of coolant in the oil. It may be too late for that if you have drained the oil.

http://www.blackstone-labs.com/

 

was it made by prestone?

 

Does your car have an automatic transmission?

I had a long time ago an Olds Cutlass with a 350/TH350. One day checking the coolant level I noticed milky residues in it and I thought it was an oil leak, but the oil level was ok, so I just drained and replaced the coolant. I checked it a couple days later and it was the same or worse, it looked like vanilla milk shake. When the car was cold or cool everything was ok, when it reached operating temp the transmission started to slip a lot.

It turned out that the leak was from the automatic transmission cooler line inside the radiator, somehow it had fractured or rusted open so the radiator had ATF in it and my tranny was working with coolant and water inside. It was 4 days from when I changed the coolant, to when the tranny died (the car wouldn't even go up the driveway) and I had to replace it, and the radiator too.

 

I am kinda of late but yes it was prestone.