|
|
|
#31
|
||||
|
||||
So I worked on getting the system charged... results are disappointing.
Pressures: I had a carpet blower and hose misting the condenser. The suction line is cool to the touch, as is the compressor body. Compressor, condenser, and TX Valve are new... I'm wondering if the "highest quality" URO expansion valve isn't working right? :/ -J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#32
|
||||
|
||||
Quote:
If I'm reading your gauges right, 30 PSI Low? 150 PSI high? IIRC you charge ES-12A based on R12 pressures minus 15 psi on high side.. ACKits says for R12 @ 80F, 18 Psi Low, 170-210 Psi High. ES-12A says it will run 15 psi lower on high side so you "real" range is 155-195 Psi. As an FYI, R134A says 80F is 40-50Psi, 175-210 Psi. Did you charge into a vacuum? Did you use the "regular" ES-12A? or the "industrial" ES-12A?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#33
|
|||
|
|||
What was the temp outside?
__________________
With best regards Al |
#34
|
||||
|
||||
Humidity too. Humidity plays a big part in the cooling system's performance.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#35
|
||||
|
||||
Yup, 30/150.
Hm, So it's overcharged? It was 88% humidity. I used the "regular" ES-12A. I did charge into a vacuum, but by weight it should be close (does having air in the system somehow make it perform better -J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#36
|
|||
|
|||
Quote:
__________________
1) '04 S500 Gold/Beige......120k Miles 2) '93 300E 2.8...Green/Tan MBTex..........202k Miles(and going) 3) '89 420SEL...Light Blue/gray Leather....155k Miles (Retired ) |
#37
|
||||
|
||||
I had poor performance from 134 despite all new components. I figured I'd try Enviro-Safe so I tried the industrial version.
Evacuated, flushed and pulled a vacuum. Followed the directions to the letter. No joy. Compressor engaged, low side pressure 25psi, no cool air, 95F ambient, 40% humidity. Added another 6oz can just for the hell of it, 45psi low side, no cool air coming out of vents. Heater is not part of the problem, I pinched it off to be sure. I don't have high side pressures figures. Something blocked like the TXV?
__________________
1988 300E |
#38
|
||||
|
||||
Heres the results of R134A in my 300D from today:
PO charged it with R134A. I had to add some in the spring. Looks like it meets spec..but thats pretty meh
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#39
|
||||
|
||||
So I figured out that my Harbor Freight gauges don't work properly, specifically the low side gauge reads low. (imagine that!) I'll report back when I get a working set...
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#40
|
|||
|
|||
Quote:
You can open plastic and move that little screw with flat head if your gauges are not set properly. I have same set and have to google proper instructions to set them right.
__________________
1) '04 S500 Gold/Beige......120k Miles 2) '93 300E 2.8...Green/Tan MBTex..........202k Miles(and going) 3) '89 420SEL...Light Blue/gray Leather....155k Miles (Retired ) |
#41
|
||||
|
||||
Pressures look OK - if the low side gauge was really off and reading too low, then the high side should shoot up like crazy. I think propane gets to a runaway pressure point someplace, which is why they blend with isobutane, ask you to keep some air in there (bad idea IMO), etc.
I think that you might not have any real quantity of working fluid in there. With the vehicle fully cold soaked, and pressure on low and high side equilibrated, what do you get? It might be lower than the actual saturated pressure meaning that youre low by a bit. You may have enough in there that the safeties dont trip, but not enough material to actually flow around and move heat. Im not an HVAC guy, but IIRC, the accumulator or R/D needs to be filled with a quantity of refrigerant in order to work properly. The propane blend is input at a much lower mass than R-12/134a, but I imagine that some still liquifies in there in order to operate properly. How to tell, especially if there is air and all in there, I dont know.
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|