this is for any vehicle. Not just the blazer as listed. My brother is a backyard car mechanic and says you dont need to pull a vacuum before charging any ac system. R-12, or 134a. I am a diesel mechanic, and do stuff by the book, when it comes to stuff im unsure of.I know you need to have a vacuum, but I am unsure of the reason. I always used a machine on everything, which when it filled the system, it also installed dye so you can find leaks later in time. I also checked the amount of refigerant that was needed in any vehicle I ever charged. What is the reason for a vacuum, and is he anyway correct not pulling one? Also, I believe a vacuum sucks debris out, which will in turn increase compressor life. All help is needed I want to prove my brother wrong.
have the same problem?
Saturday, March 7th, 2009 AT 8:24 PM