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 08-20-2003, 12:16 AM
Coming back from burnout
 
Join Date: Jun 1999
Location: in the Pacific Northwest
Posts: 2,274
Changing Receiver Drier critical to AC success? 1985 300D

When I converted my AC System on my 300D over to 134 two years ago, I changed the Receiver Drier. I am using inexpensive Pep Boys compressors which have to be replaced every two years anyway. I am once agian in the middel of replacing the AC Compressor

(1) Should I change the Receiver Driver again? These compressors only last two years.

(2) The system is open to the Atmosphere as of this moment--I ran out of time tonite changing the compressor. Will this deplete the Dessicant?

(3) What factors affect Receiver Drier Dessicant life?

(4) Whats the lowdown on moisture in the System? I know it exacerbates bearing/compressor wear..
Changing Receiver Drier critical to AC success? 1985 300D

Reply With Quote
  #2  
Old 08-20-2003, 12:58 AM
1991300SEL's Avatar
Registered User
 
Join Date: May 2003
Posts: 545
I suppose $$ are an issue - can understand that, but where's the value(TIME and $$) changing out a unit every 2 yrs. that might last 10 or more using a real compressor?

I went through this years ago with Auto Zone. $39 alternator for a 1980 Dodge Diplomat. Failed every 3-6 months. No problem. Pull it off and take it back - get a new one. 3-6 months later, same deal. After about 4 or 5(lost track), I broke down and paid about $100 for a real one. Never changed it again.

Receiver-Drier - any time you open the system, change it. Just my 2 cents.
Reply With Quote
  #3  
Old 08-20-2003, 08:26 AM
LarryBible
Guest
 
Posts: n/a
Carrameow,

Not only should you replace the filter drier after any compressor failure, you should also COMPLETELY AND THOROUGHLY flush the entire system to remove debris that will destroy the new compressor.

I have been there, done that with rebuilt R4 compressors. You would be very far ahead by purchasing a new R4, THOROUGHLY flush the sytem, replace the filter drier and then install your new compressor.

Additionally, with the system converted to 134 your high side pressure is significantly higher putting further strain on the compressor. Since it is necessary to flush and replace the filter drier, now would be a great time to reverse convert to R12.

Best of luck with it,
Reply With Quote
  #4  
Old 08-20-2003, 08:59 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Rule of thumb on drier replacement; system open for more than 24 hrs, drier more than 5 years old, OR unable to vacuum system for 24 hrs! OF course this day & age NO one wants to vacuum system for 24 hrs.

Moisture is the DEATH of any A/C system.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #5  
Old 08-20-2003, 04:05 PM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
If one can vacuum the system for 24 hours, does some of the desiccant get revived, or is it only good for one reaction?
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #6  
Old 08-20-2003, 05:17 PM
Coming back from burnout
 
Join Date: Jun 1999
Location: in the Pacific Northwest
Posts: 2,274
Thanks for all your help.........

Larry, I wouldnt mind using R12. the only problems is that its hard to locate. If you know of a source.........anyway I am dreaming of moving to New Mexico from New Jersey and maybe it wont be so humid and I wont need AC anyway
Reply With Quote
  #7  
Old 08-20-2003, 05:30 PM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
r12 is easy to buy.
You just need an EPA 609 certificate.
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #8  
Old 08-20-2003, 07:00 PM
1991300SEL's Avatar
Registered User
 
Join Date: May 2003
Posts: 545
New Mexico is bone-dry. Beautiful place. Humidity is non-existent compared to other places.

It does get hot - you will need A/C. Desert heat.

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 04:56 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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