So since the bolt was stripped, I went on youtube and found a video where the guy showed the method of using a chisel to break loose the bolt.
I went to Harbor freight and bought these chisel set for $4.99 and a hammer for $4.00 (on sale items).
I sharpen up the edge a bit on the chisel and tap a few hits into the bolt to create a groove for the big hit in order to break it loose. **Be extra careful by only hitting the bolt and not the neck of the inlet!!!
once i got it loose, I went ahead and fill up the coolant from there. Put in the new bolt and washer. All set to go!
By now there was hella air bubbles in the system. So much air trapped in the system, i can hear gurgle noises in the heater core. So this is what I did.
(took me two days of bleeding air since I work late and come home to do this before the sun goes down)
1. after filing up the coolant through the inlet plug. Close it up.
2. fill halfway in the reservoir tank
3. start engine, turn on heater full blast.
4. once car warms up..start tapping the hoses
5. bubbles will start coming out and you can see it in the reservoir
6. don't let the reservoir go emtpy. Slowly fill little by little. don't over fill because it will start bubbling out!
7. keep tapping and squeezing the lower hose and adding coolant
8. depend on your situation...it can be a quick one or a two day thing lols!
good luck!
my car is no longer over heating or the temp. gauge is no longer going up and down.
now time to put insurance on it and take off non op ---start driving.