i also had the same urge to replace most HVAC parts of my 10 year old plus, 200,000+ miles 2008 crv ex-l when my cars HVAC system conked out year Oct2014. This was caused by me using those refrigerant can refills - suspecting low refrigerant on my crv
So I would say, your plan is doable as long as you have your own HVAC equipment. Since you need to evacuate refrigerant every time you touch the system.
That was even my initial plan when I tried to replace my 2008 crv ex compressor. I started to plan and made some retrofit plugs to plug HVAC lines when isolating each lines. you never leave any lines for extended period of time.
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The following is a BACKGROUND ON MY HVAC repair journey:
For almost 2 years my crv does not have AC. Here in California, no AC is not to much of an issue when you drive to work early in the morning and late afternoon.
I do not have any equipment to do DIY repair on my car's hvac. And i know how expensive it is to have a dealer or a shop fix a broken compressor - where almost always the scope of work multiplies- so is the costs.
HVAC eqpt are expensive, not to mention the complexity of an HVAC system. But i was determined to repair my car's HVAC myself.
I figured that the investment in HVAC equipment was worth it since I have five(5) cars which I could use these HVAC eqpt (except for the 1993 civic del sol with freon which i donated in 2015 when I bought a new 2016 crv)
Since early 2015, for almost 2 years, i started accumulating hvac eqpt, started with hvac manifold set, vacuum pump, fieldpiece refrigerant scale, 30lb refrigerant can, refrigerant recovery tank, refrigerant recovery machine etc. I even get certified as a hvac tech online.
I was able to complete and finish my crv08 compressor and receiver drier replacement by early 2016. The plan was to go to the evaporator section next.