Mike is using normal engine flow with the engine running.

The reference to clogging the thermostat is for reverse flow flushing.

The engine is off and water is sent into the upper hose (normally the coolant exit from the engine( hot and headed to the radiator for cool down)). The water/flush goes in reverse through the engine. This can dislodge buildup that is not accustomed to flow from a different direction. These particles can clog the thermostat as that it does not open and only the small weep holes can handle the reverse flow. For reverse flush remove the thermostat and let the open hose from the engine empty into a bucket.

 

Understood. i will be doing a reverse flush so i will remove t stat. Thank you all for your help greatly appreciated

 

You asked how to do it and you don't even listen. I gave you the simplest way to flush it out and you are going to do a reverse flush.
Why did you even ask for help when you don't pay any attention?

 

first of i appreciate all the info you and everyone else provides . And yes i am listening, i will do it the way you say. secondly title of thread stated "how to flush w/o radiator" you showed how to flush "with radiator". im just trying to absorb as much info as i could i like to do things once. Thank you

 

That is because you can not flush the system without a radiator.