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How long should A/C vaccum hold? Is this considered OK? 200 1989

posted by  greg_mustang on  Tue Jun 17 12:14 CST 2003
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last visit: Sat May 10 07:26 CST 2014
[RELATED]

I am posting a new message as a result of rhaire's comments to my previous...
Please don;t take offense rhaire, just double checking opinions... but thanks!

My newly retrofitted 240 A/C system (I did a complete system retrofit replacing oil, exp valve, dryer, o-rings) was just pulled vacuum.
I used my Mastercool 5 CFM pump, and a new set of manifold guages.

The vacuum has now pulled up until 26 or maybe even 27, after multiple tries, leaving it pulling for around 10 minutes a shot.

It drops down to around 20 in 10 minutes, and maybe in 1 hour down to almost nothing (5).

Is this considered OK? Is this considered a system that could likely not loose coolant after being charged up? Should I put in a can of stop-leak along with the r134?

I thought it was supposed to not loose ANY VACCUM at all after 1/2 hour?... but I do not have the experience.

Please let me know how I should proceed. I am looking for a functional system, that could potentially last the season, not a perfect one.

Thanks!
Greg Mustang





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