I bit the bullet and bought a $225 pulsating flush gun. It sends rather violent pulses of fluid through the system, helping to dislodge crud. It does work very well, but I admit that most people wouldn't pay so much for a tool that they only expect to use a few times.

I'm considering purchasing one of the pulsator flush systems.

I have been struggling with a '94 Prelude and will be going through it again this weekend. This time I have another compressor, a new discharge pipe (dryer and evaporator) and evaporator. The condenser has already been replaced. I've been having a hard time getting all the little balls out of the system.

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Jim

I bought the Mineral oil from the guy who owns the 50 year old A/C shop. McParts places would have Mineral oil but I wanted the best possible for the job. It was 10 dollars for a quart, flush was $10 for more than a quart too.

The A/C guy says alot of people don't cycle the clutch by hand 10 times before starting the system, and that "hammers" the compressor (and runs it without oil) and it takes alot out of the life of the compressor. So put oil in it and turn it by hand when it's on the car, then bump a few times before putting refrigerant in to make sure the oil is circulated correctly.

Without a flush gun, the hard part would be flushing the evaporator, but I have a hose to connect to the evaporator, where I can put flush in and blow compressed air through. If it's too difficult without one, I'll go to a Mcparts and pick one up. The A/C guy said it wasn't really necessary. Otherwise a funnel and lots of compressed air works fine. I got the old "good stuff" (environment destroying) solvent for flushing that evaporates really fast so it'll help.

Little balls, little metal shards . I have to flush the system really really good. If I screw up or can't flush something, or can't turn the compressor the A/C guy said he was happy to help. I'll take plenty of pictures of my progress this weekend.

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1980 240d
1999 SL500