Help Needed with an Atypical AC Problem - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-05-2013, 05:24 PM Thread Starter
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Help Needed with an Atypical AC Problem

Well, I just spent the last several days replacing the AC compressor on my 81 380sl. However, when I pulled a vacuum, I mistakenly left the vacuum pump on with the manifold gauges open, which ended up sucking vacuum pump oil into the system.

Although I'm not sure how much oil got sucked in, it took app 150 cc of oil to bring the level in the pump back up to where it was before the oil got sucked up. So, now I'm wondering which of the following is my best option:

1) Run the AC and hope that the pump oil won't damage anything;
2) Take the system apart again, remove the compressor, replace the oil in it, and flush the hoses, considering the time and effort that doing this will require;
3) Try to remove the oil some other way;
4) None of the above.

Thanks in advance for any advice anyone can give me.

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post #2 of 3 (permalink) Old 06-05-2013, 10:14 PM
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What kind of pump would leak its oil into vacuuming line?
Can't imagine this happen.
Anyway, if you really have compressor oil in AC system, flush and replacing the dryer would be in order.
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post #3 of 3 (permalink) Old 06-06-2013, 02:25 AM
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That is the best plan, just flush it and recharge it and add the dryer like Kajtek said.
If the AC has not been run much or not at all I can't see a problem occurring if it remedied before it sees regular use for the summer.
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