Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-09-2015, 02:10 PM
Registered User
 
Join Date: Nov 2014
Posts: 93
AC service

I am looking to overhaul my AC and get a sanden compressor and new hoses. Before I do that, I would like to get any old R12 out of the system, get the AC system cleaned out and pressure tested. I am having a hard time finding a place here the SF Bay Area that will evacuate the old R12 without doing an R134a conversion first. Also, I can't find a place that will clean out the AC system, they say you don't have to do that? There is no point in spending money getting the old system converted over to R134a only to rip out the parts and install the new system that has the r134a fittings.
Any places in the SF Bay Area that can help?
Thanks!
Reply With Quote
  #2  
Old 07-09-2015, 02:39 PM
vwnate1's Avatar
Diesel Dandy
 
Join Date: Nov 2005
Location: Sunny So. Cal. !
Posts: 4,397
Post AC Flushing

NAPA et. al sell flushing kits and any place that says it's not worth doing , is criminally lazy ~ you'll under stand when you see the crud and goo that blasts out into the clean rag you *MUST* affix to the outlet side of each part you flush .

You cannot flush unless you open the dash board and disconnect the expansion valve .

There's a lot you can do in repairs and flushing , cleaning etc. before taking the car with your cans of R12 to the shop who , if they're honest , will evacuate the system as that's the _only_ way to remove the tiny bit of moisture that remains , this is what causes short lived AC work~ moisture remaining behind , it corrodes tiny pin hole leaks from the inside out .
__________________
-Nate
1982 240D creampuff 370,000 miles
1978 300CD back from the dead&1980 300CD ~ SOLD
1984 300CD KEEPER ! 440,XXX miles
1984 Euro 300TD Fully optioned SWMBO's
1974 350SLC 4 speed stickshift SOLD & missed
Krazy Kommie Ural Motos (3)
BMW Moto R60/6 Barn Find, 8,000miles
1959 VW #113 Deuxe Beetle, 36hp engine, stock
Junk, Rust, Arthritis, Crushed Spine,Broken Neck&Back
Memories, Peace Of Mind
facts & reality don't change because you can't handle them
Reply With Quote
  #3  
Old 07-09-2015, 03:08 PM
Registered User
 
Join Date: Aug 2010
Location: Sacramento, CA
Posts: 2,493
What year is the car? In my 1985 300D, after flushing all the hoses, new O-rings including expansion valve, and installing a Sanden, within a year or so the low pressure return hose started leaking green oil onto my CA air cleaner. I then replaced all the rubber hoses (exc. thin "liquid line"). The rubber looked a lot worse once I cut the ferrules off (search my post), so all were on borrowed time. I am doing that right now on my 1984 300D since the hoses were in the way of my front engine work and similar degradation. I have an AC hose crimper, so isn't hard for me. I had to vent 2 cans worth of Duracool from both cars, otherwise fairly inexpensive.

You can use your factory compressor hose fittings w/ a Sanden, as myself and another here did (see my post). You need to bend the tubes slightly to clear, which is easier when off the car. You also need the correct Sanden head (see my post).

If you do give up and just vent the R-12 to the atmosphere, insure no EPA drones are watch you. They still claim there truly was an ozone-hole problem, even though the stories of 3-legged frogs in Costa Rica turned out to be due to a bacteria that was always there. Their R-134A replacement probably proved worse to the earth since a bad green-house gas and already outlawed in many eco-minded countries.
__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans
Reply With Quote
  #4  
Old 07-09-2015, 05:00 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,302
Time traveling ozone fiends. ..
__________________
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!
Reply With Quote
  #5  
Old 07-09-2015, 05:14 PM
Registered User
 
Join Date: Nov 2014
Posts: 93
What is the order of things should I do? Get the fittings changed to r134a so a shop can evacuate the system?
Then should I clean the system then pressure test or pressure test first then clean?
Should Injust replace the hoses because I am going to use R134a?

Has anyone here used the Klima Designs Sanden bracket kit and fitting that come with there kit???
thanks!
Reply With Quote
  #6  
Old 07-09-2015, 05:53 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,302
Any home hvac tech should have a recovery system to pull the 12 out... and store it for you to put back...
__________________
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!
Reply With Quote
  #7  
Old 07-09-2015, 08:28 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,249
I just converted an 83 300D back to r12 with new compressor and dryer. Everything comes apart and everything gets flushed/blown our real good and when you think you have blown it out real good do it again. Took opportunity to have a couple of the hoses rebuilt while system was apart. It is an all day job if you have the correct equipment. Not much too it in regards to being technically challenging. You can make a mess if you aren't careful when blowing the hoses out.

I could fit you in weekend after next if interested.

I've got one customer with two w123 cars. One got updated with new p flow condenser and Sanden compressor kit from Rollguy. The other got new compressor/dryer with r12. He says the one with the Sanden cools better.
__________________
Jim
Reply With Quote
  #8  
Old 07-10-2015, 01:08 AM
Registered User
 
Join Date: Nov 2014
Posts: 93
Is your shop in the SF Bay Area?
Reply With Quote
  #9  
Old 07-10-2015, 06:41 AM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,249
NS area - North Soperton.
__________________
Jim
Reply With Quote
  #10  
Old 07-11-2015, 06:42 PM
Registered User
 
Join Date: Aug 2010
Location: Sacramento, CA
Posts: 2,493
Any shop should have the R-134A adapter fittings, and you will need them even if you go w/ Duracool or Envirosafe. You could also buy them at Autozone and screw on yourself, but there can be issues w/ the Shraeder valves. I recall a quirk on my M-B, like both low & high pressure R-12 ports were the same thread, though never ran it down.

If a Bay Area shop converts you to a Sanden w/ all new hoses, expect to pay at least $1500. Much cheaper if you do things yourself like I did, but isn't trivial. I don't notice better cooling in my 1985 300D w/ Sanden vs the 1984 w/ R-4, but never did a side-by-side comparison.
__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 06:03 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page