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Compressor condensate

jaym on Mon August 27, 2007 3:58 PM User is offline

Year: 1998
Make: Chevy
Model: S-10
Engine Size: 2.2L
Refrigerant Type: R134a
Ambient Temp: 95
Pressure Low: ??
Pressure High: ??

recently replaced comp/evap/accum using borrowed gauges, and failed to observe final ls and hs readings (inexcusable oversight!). am now seeing condensation on rear part of the compressor (v7). used kitchen scale to measure 134 weight (28 oz) and subtracted weight of can/valve/hose. i feel that the 134 weight in the system is "ball park".

question is: am i seeing too much condensate (at compressor) and maybe getting liquid return to compressor? i will borrow gauges this weekend and check pressures on low and high side and post. truck cools well (45f at vent with 95+ ambient).

thx for any comments; and, thx for all the great info on this forum......Jay

Chick on Mon August 27, 2007 4:27 PM User is offlineView users profile

You did pull a deep vacuum, right? and added back the weight lested on the underhood sticker? If 28 ounces, 2 1/2 cans would do it, taking into account some escapes when changing cans, some stays in the hose set.. It's really hard to do it with cans, just have to be careful..You may be an ounce or two low, see what the pressures say and post back..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

jaym on Sat September 08, 2007 9:54 PM User is offline

Chick, thanks for the comments. I'm finally getting to taking readings. Here is what I found:
Ambient = 86f
Engine off: LS = 99psi HS = 100psi
Initial idle: LS 38 HS 245 55f at vent
Idle after 5 min: LS 49 HS 350 64f at vent
2000RPM: LS 34 HS 240 54f

Doesn't seem as cold as 2 weeks ago, when vent temps were at 45f. System was drawn down for 30min and held for 30 min. Do these pressures/temps appear normal? Any suggestions on lowering vent temps? Thanks for your valued insight.

Btw, should one avoid having condensation "ON" the compressor or should condensation only go"UP TO" the compressor; or, is this not a good way to determine proper amount of refrigerant?

jaym on Mon September 10, 2007 9:26 PM User is offline

Am reposting from over the weekend. Would appreciate any comments.

Thx again....Jay

Chick on Mon September 10, 2007 9:36 PM User is offlineView users profile

You have to be sure you have the proper amount of refrigerant in the system. Feel the inlet and outlet of the evaporator,. Should be the same temp, outlet slightly colder, add an ounce or two at a time until you have them at the same temp..(wathc the pressures though) ..If you have this, the system is fully charged. Condensation will occur when it's humid and hot, and the refrigerant is cold...Sounds like it's cold right to the compressor..But the whole compressor isn't sweating is it??The suction side will sweat under the right conditions..Other side (discharge) will be hot.. Anyway, also try this with the guages hooked up, spray a "mist" of water on the condenser. If the high side drops like a stone, you have air flow problems..Most likely fan clutch..If they drop slowly, that is normal..Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

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