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 01-02-2010, 12:27 AM
Aquaticedge's Avatar
Bump on a log
 
Join Date: Nov 2009
Location: See Biography
Posts: 3,148
Air conditioning Question for 87TD

I've found out today my system was converted to 134a... the whole system is empty so I assume there is a leak somewhere. Where would be the most likely place to look for the leak?
__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed
Reply With Quote
  #2  
Old 01-02-2010, 12:38 AM
lrg lrg is offline
Registered User
 
Join Date: Jul 2001
Location: San Francisco
Posts: 1,163
You need to recharge the system with dye. When it leaks you'll see the dye and will know what needs fixing. There is dye that is specifically made for this use.
__________________
LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold
Reply With Quote
  #3  
Old 01-02-2010, 12:41 AM
Aquaticedge's Avatar
Bump on a log
 
Join Date: Nov 2009
Location: See Biography
Posts: 3,148
is there any common points that these cars leak from though? parts under the dash etc?
__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed
Reply With Quote
  #4  
Old 01-02-2010, 12:47 AM
Registered User
 
Join Date: Oct 2005
Posts: 4,263
The compressor is the most likely culprit, but you can't tell without checking. That means introducing something into the system, whether it be some dye with a refrigerant charge, or R22 and nitrogen to use a sniffer.

Whatever you do, do not buy a can of refrigerant that claims to seal leaks in your system.
Reply With Quote
  #5  
Old 01-02-2010, 01:41 AM
Aquaticedge's Avatar
Bump on a log
 
Join Date: Nov 2009
Location: See Biography
Posts: 3,148
I think I have a couple cans of 134a with a UV dye in it, I'll take a look... hope it's not the compressor... that sucker is a pain in the duff to get to..
__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed
Reply With Quote
  #6  
Old 01-02-2010, 02:13 AM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,928
My experience is that the condenser is the likely culprit.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
Reply With Quote
  #7  
Old 01-02-2010, 03:39 AM
Aquaticedge's Avatar
Bump on a log
 
Join Date: Nov 2009
Location: See Biography
Posts: 3,148
I'll post the results when I have them... I'll look at the Compressor and condenser
__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed
Reply With Quote
  #8  
Old 01-02-2010, 03:48 AM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 9,077
Thumbs up

Who converted it? One of those $39.99 kits?

Probably have o-ring leaks.
__________________
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]
Reply With Quote
  #9  
Old 01-02-2010, 12:29 PM
Aquaticedge's Avatar
Bump on a log
 
Join Date: Nov 2009
Location: See Biography
Posts: 3,148
whoever did it replaced the lines, there's no bolt on anything on the low or high side, it's all hoses with the right connections. I'll try to take a pic or 2
__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed
Reply With Quote
  #10  
Old 01-02-2010, 07:21 PM
Hit Man X's Avatar
I LOVE BRUNETTES
 
Join Date: Sep 2004
Location: FUNKYTOWN
Posts: 9,077
Thumbs up

Quote:
Originally Posted by Aquaticedge View Post
whoever did it replaced the lines, there's no bolt on anything on the low or high side, it's all hoses with the right connections. I'll try to take a pic or 2


Well they have to bolt to something, some place... as there is an expansion valve in the system. Also from the condenser to the dryer.
__________________
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]
Reply With Quote
  #11  
Old 01-02-2010, 07:54 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
DO NOT USE DYE.....
It will do you no good if the leak is in the evaporator,
it may not do you any good if the leak is on the top side of a fitting..
and it has the potential to gum up something critical like the TXvalve...

Since you are empty... why don't you put a new set of orings into all the places.. then check for leaks.. that way once you are good to go it should last a long time..
The best way I know of to check for leaks is to use four ounces of R22 and nitrogen in your system ... this is APPROVED BY THE EPA for leak finding and you can just vent it when you have found the leaks..
and it leaves no GOOP in your system.
It does require the use of an electronic detector which you may can rent or borrow...
My 81 wagon had a leak in the big hose across the engine AND in the evaporator..
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 07:31 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