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#16
06-07-2013, 02:16 PM
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Yes,
I like to pump down a new system for 1 hour.
__________________
 Did you just pass my 740 at 200 kmh in a 300SD?????1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership 
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#17
06-07-2013, 02:17 PM
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This is the vac pump I use:
http://www.harborfreight.com/25-cfm-vacuum-pump-98076.html It pulls about 28" hg...should be enough to do the job right? I just want to cover all my bases and make sure I am not overlooking anything.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#18
06-07-2013, 02:38 PM
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Quote:
__________________
Did you just pass my 740 at 200 kmh in a 300SD?????1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013 100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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#19
06-07-2013, 03:16 PM
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Hmm
Quote:
I frequently see pressures like this while under charged with refrigerant, from excess oil.  If that is the cause, the only solution is: * Remove the compressor and drain it * Flush the evaporator * Flush the condensor * Flush the lines * Replace the reciever dryer again Reassemble the system, add oil and charge with refrigerant. .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#20
06-07-2013, 03:23 PM
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I have a feeling you are right...its the only thing that I can believe could be happening.
Is there a better way to flush than what I have used in the past? Interdynamics CA1 - A/C System Flush | O'Reilly Auto Parts
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#21
06-07-2013, 03:27 PM
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Quote:
When I flushed my w126, I used acetone from home depot. Just be carefull with it as it eats paint. Keep in mind that the ac system on the w124 is working perfectly, it is still just ok...
__________________
Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2
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#22
06-07-2013, 03:49 PM
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Answer
Quote:
I use at least one quart per vehicle. DANGER: all flushing must be done OUTSIDE (never in a building) !!! Mineral Spirits as A/C Flush? to flush or not to flush A/C ? to flush or not to flush A/C ? .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#23
06-07-2013, 07:58 PM
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Well spent the last 4 hours flushing the entire system. Removed compressor...very little oil came out at all...
Everything back in still same issue. 20ml comp, 40ml evap, 20ml hoses 40ml evap 20ml condenser Guess its down to either the manifold hose, or the evaporator as the issue... I did see however, that my initial 55psi / 380psi is in reality 45psi/380psi when I move to 1500rpm. Low side is ok, high side is still high.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#24
06-08-2013, 05:35 PM
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Is there any diagnosing I can do before giving up and handing it over to a professional to figure out why its so high?
Any tests, temperature readings anywhere on the lines etc?? I'm just utterly lost after verifiying there is no excess oil in the system.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#26
06-08-2013, 09:31 PM
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Brand new Behr condenser. Tube and fin OE Part #. Its 2 weeks old.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k
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#27
06-08-2013, 10:47 PM
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That pump should get lower than 28"Hg you may have air or moisture in the system remove the 134 and fill to 150psi for 4 hours. Verify it holds.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#28
06-08-2013, 11:01 PM
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Fill with (?) to 150psi?
No leaks in the system...I've never lost any refrigerant in the 7 years I have had the car. It is currently about 150psi static when the car is off. EDIT: Just thinking about it -- could it be possible that my gauges are bad or have a problem are either not pulling vacuum out of the system correctly or letting air back in? I mean I have used the same set over the years with the same issue. I did however use them on the CLK320, BUT I did not charge through them or evac the system. Only verified pressures and then charged on the low side with a separate hose.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 06-08-2013 at 11:14 PM.
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#29
06-08-2013, 11:18 PM
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Excess air in the system will cause high pressures and poor performance. I have to wonder if your service port connections are flowing in both directions....You may be pulling a vacuum on the lines but not the system....
You seem to be winning the lottery on oddball A/C problems lately. Just sayin...
__________________
 90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#30
06-09-2013, 12:38 AM
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next post edited out.
__________________
2016 Monsoon Gray Audi Allroad - 21k 2008 Black Mercedes E350 4Matic Sport - 131k 2014 Jeep Wranger Unlimited Sahara - 62k 2003 Gray Mercedes ML350 - 122k Last edited by ps2cho; 06-09-2013 at 02:03 AM.
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