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Re: A/C Expansion Valve Failure?
Posted by Robert Kaplan (more from Robert Kaplan) on Mon, 5 Aug 2002 15:00:55
In Reply to: Re: A/C Expansion Valve Failure?, Gene N
[Profile/Gallery]
, Mon, 5 Aug 2002 14:39:06
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I would like one of those new condensors. They are supposed to be a lot better. I haven't had the energy for that project this summer.
Where did you get the flush, and how much was it? I switched from mineral spirits to brake cleaner on the recommendation of one of the people on the ac board. Brake cleaner is less than $20/gallon. The flush I have seen is around $50/quart.
You get a much more consistent and meaningful pressure readings at 1500 rpms after the system has had a few minutes at that speed to stabilize. I use a rock to hold the accelerator pedal. Knowing the ambient temperature (fairly exactly) is also critical when you check pressures so that you will have some idea what the temperature pressure ratio is. The temperature/pressure ratio is the only method I have found for monitoring the charge over a period of time. I currently have my high side at 3x ambient temperature (r134a).
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