Originally posted by immajackuup
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AC help please! So hot. I need proper pressures.
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Originally posted by bben76 View PostIt was easier for me to run flush agent and compressed air through in reverse direction of what freon runs through it b/c I couldn't get the end of the air compressor and blow nozzle under the dash.
Originally posted by scottinAZ View PostWhat is reccomended for a conversion such as this is ester oil. will not react with the residual oil left in the system (no way to get it truly all out) the way that PAG and mineral will (totally unmiscable, so can cause issues with lack of lube)Originally posted by agent View PostI was given that same info by two separate people (bimmerteck being one of them) and used ester in mine.
As I have said before in other threads, a better option than any of these for our old r12 systems is to fix the leaks and recharge with r414b. ZERO oil hassles.Last edited by Ryann; 06-14-2011, 05:52 PM.
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Originally posted by agent View PostCorrect me if I'm wrong, but shouldn't my aux fan either "work" or "not work?"
Kind of... the fan runs on two speeds factory.
Low speed may not provide enough airflow at high ambient temps.
This is why I hard wire my aux fans for high speed only operation.
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Originally posted by immajackuup View Postno need for that just get colder temp switch from e36
A colder temp switch in the radiator will make no difference in aux fan speed, or activation when the fan comes on during A/C operation. The A/C button on your dash is wired to command the low side relay to run the aux fan WHENEVER the A/C is on regardless of the temp switch.
It wasn't but a week ago you were asking r3v about aux fan's, how the 2nd speed is obtained, whether you need a pusher or a puller. Now here a little over a week later your going to tell me that I'm killing a compressor, then claim that the high side pressure has some bearing in the life of the aux fan's motor or control system, and insinuate that scottinAZ is wrong about bypassing the fans's resistor. (he's not, it's a cheap yet effective option for conversions needing more airflow at idle)
http://www.r3vlimited.com/board/showthread.php?t=210864
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For the noobs (like me), here's a great write up on basic gauge readings
http://www.denlorstools.com/autoblog...ngs-explained/
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ah ha, i see.
I've already mounted the compressor with 4oz by volume. So I decided to see what the difference really is.
Using water (b/c I don't have a lot of PAG left) I measured 4oz of water by volume and put it on the scale:
Turns out 4oz of water by volume when weighed is 4.3oz in weight. 3.7oz of oil (by weight) is what I drained out. So I overfilled by .6oz.
But maybe water density isn't the same as PAG oil? I checked, .5oz by volume of water is .6oz weight:
And .5oz of PAG oil volume is the same:
Very non-scientific but in the end I'm very close to what I drained out, within .6oz if I did this right.
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Here's my next question. Using the Harbor Freight vacuum my air compressor can't hold the recommended 75-90psi. It settles and remains at 40psi when drawing the vacuum. Which results in this gauge reading:
Am I reading this gauge correct when I say I'm pulling only about .5inHG? Is this going to be sufficient to vacuum down?
I'm only drawing from the low side, should I be drawing down the high side too?
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Success!
I don't know where in Nashville you are but if your anywhere close to me(south east Nashville) your welcome to come use my 5 cfm vacuum pump so you can be sure to get all the moisture out of the system. I'd hate to see you have to go around again.
Success! Got down to 42-43f vent temp on recirc. Ambient temp 75-ish. Not sure what Relative Humidity is today.
Hare are my gauge readings at 75 ambient temp:
Idle: low 43 high 210
1500 rpm: low 33 high 235
Idle
1500rpm
Is this good? Bad? It's cold now so something is working :D
I primed the lines to eliminate atmosphere.
I was a little worried during charging because the site glass on receiver/drier looked frothy again, but as soon as I got close to the right charge it cleared up. Now it's completely clear, this is good right?
I put in two 12oz cans, so 24oz and then added as close to 6oz of a third can as possible. To track how much was going in I kept my scale handy - I measured how much the can weighed new and then continued to remeasure its weight as it emptied.
The compressor seems to be cycling as I can feel the drag just a tiny when it clicks on and off.
This is where I purchased my remanufactured compressor: http://stores.ebay.com/compressorsoftheworld for about $130 (including s/h)
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