how do i flush my sealed radiator system on my 2005 Dodge Stratus se 2.7 litre motor

Try a new radiator cap (About $5). It might not be holding pressure.

the cap is brand new,it is not losing water it is like i go to town run errands about 35 minutes. The temp gauge is at about half way mark but when i park the water is like boiling like if you were boiling it on the stove, some one told me it was my water pump but i want to flush the radiator first but im not real sure how to burp it and drain it.

See the attached pictures. Open the bleeder with the engine running, while filling the radiator, to purge trapped air in the system. The drain for the radiator is indicated in the picture below.

Drain

thanks for the info you have been very helpful

I have the exact same problem,did this solution work for you.I am not mechanically inclined and need to know what to tell mechanic.Some help please

Although this post is old. I will inform you that it helped me locate the drain purger. All you need is jack stands, a jack, and a tool such as a hammer or a wrench to twist the bleeder loose. This will the leak antifreeze from the radiator, similar to the oil pan. Radior is located directly in front of the fans and the bleeder was located on the radiator side where the passenger is at on my dodge stratus. I used nearly 2 gallons of distilled water to clean the car radiator with a radiator treatment and soon I will bleed it again after 3 days to clean the radiator completely. Hope this helps someone.

Also you need an oil pan or something to collect the old used antifreeze to send to autozone or some place that will take it

I had a dodge strat had same issue come to find out my water pump was the issue.

Are your cooling fans at the radiator working? Start with the simple before getting to deep. I'd start there then thermostat. Radiator flush. If it wasn't hold pressure you'd hear it when it heats up. The. I'd look at the water pump last it may be starting to fail.