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How do the old style R11 flushes work

bob234 on Sun August 29, 2010 6:40 PM User is offline

Year: 1992
Make: Chevrolet
Model: Silverado
Engine Size: 5.7
Refrigerant Type: R12
Ambient Temp: 95

There was a guy selling a couple cans of this at a yard sale for $20 so I picked them up. Since I have a R12 system, they will be of use for me if I need them later on. They stopped making these long before I started driving so I don't know how they work. My buddy said you hook the flush can to the low side, and undo the high side line where the orifice tube is, and put a container under the line to collect the debris and oil. Is what he saying correct, or do you shoot in it, then evacuate it? I thought you weren't allowed to vent cfc's anymore, that's why I am asking.

Photo obtained from this auction

Edited: Sun August 29, 2010 at 6:44 PM by bob234

TRB on Sun August 29, 2010 6:56 PM User is offlineView users profile

Personally I would have used the Hecat products. Half gallon of reusable flush for $21.00 dollars.

Hecat Safe Flush.

Hecat knows all the break down on these flush agents. I'll let him comment on what could be in the ID product.


When considering your next auto A/C purchase, please consider the site that supports you:

HECAT on Mon August 30, 2010 6:39 AM User is offline

R-11, R-113, and more recently R-141b; are excellent A/C system refrigerant type flush chemicals that are now regulated and no longer manufactured. It is illegal to posses R-11 without a 608 or 609 cert; and it is also illegal to vent such product to the atmosphere (search the epa web site for more info). R-11 became tightly regulated in 1992, and manufacturing ceased in 1995. This type of refrigerant pressure can flush method was somewhat effective on the single path tube and fin heat exchanger, for mineral oil only, and evaporated quickly at ambient temp or with a quick "blow". It was designed to be directed at the evap or condenser and the outflow was just vented to atmosphere. "Shoot it in and vac it out" is not flushing. I would suggest proper disposal.


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