Search found 13 matches

by james89dx
Tue May 05, 2020 8:29 am
Forum: Automotive Air Conditioning Forum
Topic: equal pressure both sides of the gauges
Replies: 7
Views: 1756

Re: equal pressure both sides of the gauges

You're not opening the valves on the manifold gauge set are you?
by james89dx
Mon May 04, 2020 1:33 pm
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Re: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

Welp, just to update this..... zero difference after vacuum/recharge on the big boy shop equipment. He's pretty surprised too as he works on a lot of fleet Altimas and knows first hand they should be able to do into the 40's vent temps no problem. I'm thinking this thing must have too much oil. The ...
by james89dx
Fri May 01, 2020 1:20 pm
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Re: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

Tim wrote:1000 or lower microns. It would indicate a working pump in my opinion.


I gotcha, thanks. I will definitely update this hopefully by early next week with the vent temp results after the vacuum with the actual professional shop machine.
by james89dx
Fri May 01, 2020 1:15 pm
Forum: Automotive Air Conditioning Forum
Topic: Damaged R12 shraeder valve when installing R134a adapter
Replies: 3
Views: 1558

Re: Damaged R12 shraeder valve when installing R134a adapter

What is damaged on the schrader side exactly? Is it the outside threads or just the inner core? If the core, you can replace just the core for fairly cheap and easily.

This might be your car's last stand fighting you to the death saying "stay R12, stay R12" lol.
by james89dx
Fri May 01, 2020 10:28 am
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Re: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

This is an incorrect way to look at the cost of proper tools IMO. You said you did 6 other jobs. The micron gauge will stay attached to your gauge set. You will know every time if you have a proper vacuum or not. Help determine leaks also without using refrigerant. I just answered your original pos...
by james89dx
Thu Apr 30, 2020 5:07 pm
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Re: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

Why do I only ever see micron gauges used in home HVAC work? I'm not disputing the benefits for automotive work, but I've never seen them used, and even my professional mechanic friends don't use or own them for automotive AC work. It just seems like an expensive tool for me to add just to see if my...
by james89dx
Thu Apr 30, 2020 4:46 pm
Forum: Automotive Air Conditioning Forum
Topic: Does a home vacuum pump extract oil along with refridgerant?
Replies: 6
Views: 2170

Re: Does a home vacuum pump extract oil along with refridgerant?

Look for R12 on Craigslist or Offer Up or eBay. I have always found them to be more than plentiful on all those platforms, even to this day. Expect to pay about $25-35 per 12-14 oz can on Craigslist or Offer Up, and probably $45-50 per can on eBay on average. There's a whole case of DuPont 12 oz can...
by james89dx
Thu Apr 30, 2020 3:36 pm
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Re: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

Well, I don't have a micron gauge and looks like they are not cheap enough that I'd care to get one just as a test. I mean for the cost of a micron gauge I can just buy a whole new good quality pump. Let's say I did have a micron gauge though, and let's say my pulls were coming out to 500 microns on...
by james89dx
Thu Apr 30, 2020 7:57 am
Forum: Automotive Air Conditioning Forum
Topic: Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?
Replies: 15
Views: 3695

Can a vacuum pump be "bad" despite pulling to proper Hg vacuum?

Is it at all possible that a vacuum pump could still pull down to ~28 Hg on the manifold gauge set (as mine does) but yet somehow NOT properly vacuum/remove all the moisture in the system? :? Trying to figure out why my past couple of projects are all spitting out ~60 degree vent temps for no good r...
by james89dx
Mon Apr 27, 2020 11:32 am
Forum: Automotive Air Conditioning Forum
Topic: Put a bend in new suction hose to match OE
Replies: 12
Views: 3668

Re: Put a bend in new suction hose to match OE

I don't know if it's from initial storage/shipping loops of bulk hose but AC hose definitely prefers to always stay curved in the same direction as the way it was curved when cut off the big spool. I have made a lot of custom AC hose kits over the years and learned long ago not to try to go "ag...

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