I have an older Honda Accord. I believe I need to replace my thermostat. I’ve been having trouble with loosening the plastic drain plug. It’s just stuck shut and it doesn’t do anything it just won’t turn.
It's not critical to fill the expansion bottle immediately, The fan will kick in about 15 mins and the system will burp out any air thru filler funnel. After system burps air out I will then fill up expansion bottle yes there is some air in tube that will go back to radiator but after a few driving cycles it will clear itself out.
You might like to add a flushing step which is adding distilled water into the radiator and running the car. Then emptying the distilled water from the radiator. This clears out the old anti-freeze in the engine. Your current step only clears out the old anti-freeze in the radiator.
I wouldn't do it.. you will not get all the water out of the engine block and of u add the pre mixed coolant then you will not have the proper mixture..
