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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-04-2009, 02:16 PM
Registered User
 
Join Date: Aug 2008
Posts: 212
Identifying the air cond. low pressure line and end color

On a 195 SL500, can anyone explain how to determine the location and color of the low pressure line on the air conditioning piping? I need to check the system and might want to use a sealer. Has anyone successfully used a sealer to plug a leak in the evaporator? I posted this on the SL forum but got no replies. Thanks, Steve

Reply With Quote
  #2  
Old 04-04-2009, 02:23 PM
Registered User
 
Join Date: Oct 2005
Posts: 4,263
I doubt that you will have any luck with the sealer, but if you do use any, be sure to know exactly what you are putting in and label the system very conspicuously to warn future service technicians.

The stuff sold at the big-box parts stores will almost certainly not help at all. Especially be wary of so-called "o-ring conditioners" which can cause leaks where none existed previously.

Cryoseal is one product that might actually work. This is something that you get installed at a shop, rather than attempt to do yourself. They shrink-wrap the service ports to prevent disasters in the future. But still, although it might work, I would bit the big bullet and pull the dash.

That is, if you are 100% sure that you have an evaporator leak. There is a test fitting which bolts on in place of the expansion valve to charge the evaporator with nitrogen.
Reply With Quote
  #3  
Old 04-04-2009, 04:50 PM
Registered User
 
Join Date: Aug 2008
Posts: 212
mysterious lime-green slime leaking from hose over trans

I took my SL500 1995 out for a spin after placing a block/heater core sealant into the heater core last week. It is still leaking a small puddle of green, kinda thick slime after the car sits or is driven. When I did the heater core, I replaced the thermostat because it was giving me trouble and the antifreeze. The car had Prestone (which is green) in it and I flushed everything out and installed the Zerex brand (which is kinda light yellow) Since the green slime is still dripping out, I am concluding that this is freon/dye residue. The car still cools well. The dealer says that the hose that this stuff drips from (located in the trans/drive shaft tunnel) is coming from the heater core/evaporator compartment and if it isn't antifreeze, it has to be the freon/dye leaking out. Anyone have any thoughts? Agree or disagree? To remove the dash and replace the evaporator is about a $4K job at the dealer. The price on the MB dealer evaporator is $800 alone. So I would be inclined to use a sealer if that might work. I welcome ideas at this point. How about the MB service techs weighing in on this?
Reply With Quote
  #4  
Old 04-04-2009, 05:06 PM
Registered User
 
Join Date: Oct 2005
Posts: 4,263
If it is dye, it will be fluorescent. Aim a UV lamp at it and see if it glows. Now, just because it is dye doesn't mean that it definitely came from the AC system, but dye is routinely added there and not normally added anywhere else.

I realize how difficult it is to change the evaporator in that car. Sealer is used for situations like this, but mainly for an owner who does not plan to keep the car very long and thus doesn't care much how many more years of AC it has left, as long as it runs for a season or two. If this does not describe your relationship to your car, stop thinking about sealers.

Reply With Quote
Reply

Bookmarks


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 09:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page