I'm getting my A/C charged tomorrow after finally getting around to replacing one of the low pressure lines that had a hole in it. Since it has been open to the atmosphere for a while, I've decided to replace the compressor dryer since it's most likely saturated. However, I'm not that familiar with A/C systems and wanted to see if it's possible that there is residual R134a left in the high pressure lines. I'd prefer to not remove the lines and then have my hand blown off or something. Would the high pressure side still be charged or am I good to go?

 

I used a piece of rope to yank one of the high pressure lines off while standing back. There was only a smell of R134a so the lines were pretty empty.

Have a safe day.

 

when the system is exposed you need to replace the receiver/dryer like you said and the expansion valve as well. This can make a huge difference in the final outcome. My Ed hatch routinely gives a 40 degree breeze in 90 degree weather. Depending on who's doing the charge they might not suggest this.

 

Why replace the expansion valve? Where the hell is it? I tried to locate it.

 

The expansion valve is attached to the evaporator, #12... http://www.acuraautomotiveparts.org/...ystemcomp=List All&vinnoT=&trim=&trans=&view=normal

However, I see no reason to replace it if all that was wrong was you replaced a line that was leaking.

A new receiver, [compressor dryer] is all you should need, if system was open for some time an A/C flush is probably a good idea, at the very least pull the compressor, drain it and replace the A/C refrigerant oil for the system, 2oz of C4 oil and the rest with Ester oil, put the 2oz of C4 into the compressor and split the Ester oil between the compressor and the reciver, replace any O rings of fittings you have opened, [lube up the O rings with C4 oil] do not "overtighten" fittings

Make sure when it is recharged that the system is under vacuum for about 1hr, [no less then 45min]. 94

 

does the c4 oil have uv dye?

 

It does not, however the Ester oil can be had with or without dye. 94