A/C Flush

[curtie94]

1991 Honda Accord

I bought a can of aerosol ac flush how will I flush the system? Will I have to remove every component? Should I flush the evaporator? As for the condenser can I flush through the line that goes from the ac compressor and then out of the line that goes to the accumulator? Please help this is my first ac flush.

Im going to replace the accumulator and all o-rings. Then I was hoping to flush out all oil and refill, so I know how much is in there. I can get the vacuum pump and gauges to refill afterwards.

I tried to use a ac forum site but they kept deleteing my post because I am not a "SKILLED A/C MECHANIC"

[C91BLX7]

Your going to have to take everything out to clean it properly.

[curtie94]

Ok how about to just remove the oil, because its not like the compressor blew or anything, it has just been open from bad o-rings and there is moistire (sorry can't spell) in there. I would like to at least remove the oil and add the correct amount in.

[Tippey764]

All you need to do is replace the seals, replace the drier, add some oil, pull a vacuum and recharge the system

You don't " flush " the a/c system. There is never any dirt in your a/c system. if there is you need to replace every last piece.

And there is no such thing as an " accumulator " in an a/c system.

[xkjnboix]

http://www.cb7tuner.com/vbb/showthread.php?t=165508

[curtie94]

Alright by accumulator I meant drier. I have read this:http://www.cb7tuner.com/vbb/showthread.php?t=165508

Are the o-rings on the compressor more apt to fail then the other o-rings? Because my compressor is full of oil and last time I just filled it there was an oil spot under the compressor on the ground. It's like it leaked when it was turned off. Can that happen?

[oyajicool]

There is an accumulator installed on low side of orifice equipped a/c system.

With variable expansion valve equipped a/c system, there is a dryer in high side.

It is good idea to flush the system with flushing agent in the direction of normal refrigerant flow from one side of a unit to other end of an unit which should be disconnected. There should be a catch tank/bucket to collect dirty flushing agent.

I have seen a strainer installed on an expansion valve plugged up with debris which prevented from this system to work properly when there shall not be any debris.

Above information is from working along side of a mechanic who works on a/c systems on aircrafts. Automobile a/c systems should not be all that different.

[oyajicool]

Alright by accumulator I meant drier. I have read this:http://www.cb7tuner.com/vbb/showthread.php?t=165508

Are the o-rings on the compressor more apt to fail then the other o-rings? Because my compressor is full of oil and last time I just filled it there was an oil spot under the compressor on the ground. It's like it leaked when it was turned off. Can that happen?

It can happen.

[curtie94]

i bought an o-ring set and planned to go around and replace all o-rings especially compressor o-rings.

What can cause an ac oil leak from the compressor when it is off?

[curtie94]

Would it be ok if it doesn't hold a vacuum to add a can of r134a with dye to see where it is leaking?

[oyajicool]

suspect worn out seal
old age
just happen
it can happen

[curtie94]

well when I bought the car it had sat for 3 years without running. is it safe to run the system with one can of r134a so I can find the leak

[oyajicool]

read the thread about the a/c retrofit till understand it.
follow it.
That's what I would do if I were you...

Or

You do what you think is safe and ok as long as it is within the rules and regulation in where you live.

[curtie94]

alright i'll write back after I do it.

[Saidaigen8]

Would it be ok if it doesn't hold a vacuum to add a can of r134a with dye to see where it is leaking?

By the law no. How long does the system stay under vacuum before it leaks out?