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  #16  
Old 03-23-2012, 01:16 AM
just-n-time's Avatar
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Location: Louisiana266 Maloy Rd winnfield71483
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Quote:
Originally Posted by Hit Man X View Post
http://www.ackits.com/aacf/ptchart.cfm

Test these at high idle.

Make sure you have no bad vac pods, a dead center pod keeps the defroster pod from fully closing which shuts the center vent flapper door...

Freeze 12 sucks in these cars in the city. Works fine freeway. Cost of R12 is not bad at all if you look hard and buy it off season.
now realy, if you do a great deal of city you are correct it is not so great, but he lives in the north woods not like u and I we live in the heat belt.

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  #17  
Old 03-23-2012, 01:20 AM
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Location: NE Ohio
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I've got a few cans of R12, they were 20$/each. Originally bought them for the SD.

I use the ES-12A in the 190E because I'm cheap and there was a leak for a while. So far I've had this ES-12A stuff in for more than a year and its still cold. I mean 34F at the center vent (80F ambient) is good enough by me.
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(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
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  #18  
Old 03-23-2012, 07:56 AM
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Join Date: Jan 2006
Location: BELEN NM
Posts: 140
I popped a bottle of wallyworld stove propane in mine a month ago and am a VERY happy camper! It sucked it in in about a minute or two. Ive been wanting to do this for a few years and finally thought oh what the hell and now I am SOLD 100%. it gets colder quicker and the head pressure is a lot lower!.....I have used freeze 12 also in the past and give that one a thumbs up. If your a cheapo/rebel like me and a dupont conspiracy theorist then the propane is the best stick it up yer butt, i've seen in a long time LOL......its almost as much fun as burning 100% two stroke oil in my SDL at 50cents a quart when its on sale!
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93 dodge cummins truck~old reliable
01 Volvo AWD XC70 Turbo Wagon
74 450 SE on the way out!
Recent: 1972 Toronado 56k on the clock!

IF it plugs in, lights up, makes noise,
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  #19  
Old 03-24-2012, 01:23 AM
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I was talking with Hit Man X earlier about the main air flap maybe not working properly. I tore into the area today and found that it stays shut no matter what mode I have it set for. I've yet to find my MityVac but when I do I'll confirm that the pods are dead.

So the question now is how much does defective pods diminish my cooling capacity? Is 56-58F at the center vents on low fan speed acceptable for a W126? I know that its not quite fair to compare the center vent reading on my 190E to the 420SEL because the 190E's evaporator is right on the other side of the center vents and the 420's is elsewhere.

I found this in the FSM that might be helpful for others:
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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
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  #20  
Old 03-24-2012, 01:28 PM
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Quote:
Originally Posted by JamesDean View Post
I was talking with Hit Man X earlier about the main air flap maybe not working properly. I tore into the area today and found that it stays shut no matter what mode I have it set for. I've yet to find my MityVac but when I do I'll confirm that the pods are dead.

So the question now is how much does defective pods diminish my cooling capacity? Is 56-58F at the center vents on low fan speed acceptable for a W126? I know that its not quite fair to compare the center vent reading on my 190E to the 420SEL because the 190E's evaporator is right on the other side of the center vents and the 420's is elsewhere.

I found this in the FSM that might be helpful for others:
that could be a reason for temp. being less than you wish for but not restriction or high pressure on the high side, adding another can to clear up the bubles will not bring down the pressure. how old is the exspansion valve? it has a very small transfer arrea and even slite crud can plug it enough to cause high readings. then again if it is the Orifise type it may have what is called the black death, at whitch time it is flush time to clear out those contaminets. Good luck with it. OH yes before I go If your ambient temps are from 75 to 85 your high side pressure should run from 160 to 220 psi Memory (JNT)
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  #21  
Old 03-24-2012, 02:19 PM
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My high side pressure is only about 160-180 or so which is on the lower side of the scale for that ambient temperature.
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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
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  #22  
Old 03-26-2012, 10:01 AM
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Disconnect the arms from the pods and wedge the door open. You will then be recirculating the cooled air making it colder in the cabin as opposed to cooling ambient air.



This is also causing a vac leak under the hood. So once you repair the system, recheck your CO.

Replacing the three on behind the glovebox/air bag area are super easy. The PITA is the center vent pod which is linked to the defroster. Took me a few hours do R&R on my 300SD.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #23  
Old 03-26-2012, 04:50 PM
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Quote:
Originally Posted by Hit Man X View Post
Disconnect the arms from the pods and wedge the door open. You will then be recirculating the cooled air making it colder in the cabin as opposed to cooling ambient air.



This is also causing a vac leak under the hood. So once you repair the system, recheck your CO.

Replacing the three on behind the glovebox/air bag area are super easy. The PITA is the center vent pod which is linked to the defroster. Took me a few hours do R&R on my 300SD.
Yea, I will probably end up doing that. Hopfully that help drop the vent temp. I think 55/58F is too high but I really dont have anything to compare it to.. I charged up Mike's new 560SEL and it was getting 50F at 75F ambient. So he probably has door problems as well.

Eric what do you get at the vent when its 80F out?
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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
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  #24  
Old 03-27-2012, 10:12 AM
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Quote:
Originally Posted by JamesDean View Post
Yea, I will probably end up doing that. Hopfully that help drop the vent temp. I think 55/58F is too high but I really dont have anything to compare it to.. I charged up Mike's new 560SEL and it was getting 50F at 75F ambient. So he probably has door problems as well.

Eric what do you get at the vent when its 80F out?


I will try to drive 300SELol today and check for you. This car is on R12, fully charged, rebuilt+resealed system, working aux fans, etc. It certainly feels cooler than mid 50F area.
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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.
[/IMG]
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  #25  
Old 06-10-2012, 05:39 PM
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So I just did some testing on my car today. 95*F out, about 30% RH. Low side at 1200 rpm was 33 PSI. I didn't hook up the high side but it was over 250 since the aux fans were running. Vent temps were about 70*F... kind of meager. The FSM says I should be getting 57*F vent temp, with 21 PSI on the low side and 237 on the high side.

I am running a mix of propane / isobutane for testing. Seems the test is failing.

Is it possible I over charged the system? The suction side line is cool to the touch.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

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  #26  
Old 06-10-2012, 08:03 PM
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I've noticed the low side pressure seems to move around a lot... like the TX valve is sticking? I got a video of it:

350 SDL AC pressure - YouTube

Any thoughts?

-J
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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.
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  #27  
Old 06-11-2012, 04:53 AM
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I sure hope it's okay. I just replaced the compressor on my E420 and that fluctuation on the low side is exactly what mine is doing, except it was 100 degrees out and the low bounced from 50 to 55 psi at the same frequency as your video. I am getting cool air out of the vents.
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1993 400E, 256,000 miles (totaled)
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  #28  
Old 06-11-2012, 07:50 AM
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Cruisin on Electric Ave.
 
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The air from my vents is cool too... not cold. It was about 85* out when I took that video.
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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.
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  #29  
Old 06-11-2012, 03:41 PM
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Join Date: May 2007
Location: Arizona
Posts: 760
I am at a disadvantage because the high pressure connector on my manifold gauge set broke while I was refilling the system and all I have right now is the low side reading. This is the second set of gauges that had the high side break. I guess you get what you pay for with these cheap Chinese products. Using it maybe once a year is difficult to justify buying a good set for $300 but I am almost there. I hope the fluctuation on the low side is normal.
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1994 E420, 200,000+ miles
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  #30  
Old 06-11-2012, 06:47 PM
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Join Date: Apr 2005
Location: NE Ohio
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Quote:
Originally Posted by emerydc8 View Post
I am at a disadvantage because the high pressure connector on my manifold gauge set broke while I was refilling the system and all I have right now is the low side reading. This is the second set of gauges that had the high side break. I guess you get what you pay for with these cheap Chinese products. Using it maybe once a year is difficult to justify buying a good set for $300 but I am almost there. I hope the fluctuation on the low side is normal.
I have one of these manifold sets, just run a google search on them and you'll find em for $66-75 or so.

ATD-3688 - R134a/R12 Air Conditioning Brass Manifold Gauge Set - ATD Tools, Inc.

I haven't had any leaks or breaks with it.

__________________
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
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