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 ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-21-2011, 07:16 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
a/c should work, but...

95 e300d, 269,000. Holds vacuum for an hour easily. After owning it for 8 years, a/c stopped a month or so ago because it was a little low on 134. No aux fan, no compressor, nothing. Guy put some 134 in and away I went. Today, took my lovely wife on a 2.5 hour hell ride from WDC to Charlottesville to pick up my daughter with NO a/c. Pulled into a local carquest and the guy said he'd have a look. He hooked up his machinery to the low side valve (it wasn't the fitting near the fender not the one down by the radiator. He said before I started it, pressure was 120 or 130 and when I started it, pressure was 31 or so. Compressor was cycling, Aux fan was spinning, but no cold air. I checked all of the fuses and even replaced the water valve fuse. He thought it might be the water valve but declined to speculate further because he was unfamiliar with the alien being.

I replaced the water valve in 2008 with a new one from MB. I replaced the CCU a couple of months ago with a rebuilt (rebuilt from Phil). Also in the spring, I replaced the Klima relay with a factory oem unit. This is starting to sound like a gremlin to me. Any thoughts? (my girls were not happy) Temp on my car read 104. Other than that, car ran fine, coolant temp stayed mostly below 110. Any help is appreciated.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #2  
Old 07-21-2011, 07:27 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,062
"holds vacuum for 8 hours easily" not a sign of a leak free mobile system...

31 sounds low, but not much, what did the air in the cabin feel like? HOT, hot, warm, outside temp... details.

with the "compressor cycling normally", what temp was the low side line?
__________________
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
  #3  
Old 07-21-2011, 07:34 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
Air inside when the a/c was on - wheel turned to solid blue, felt not cool, but definitely not hot. I tried turning it off completely, pressing all of the buttons, all fan speeds. I even disconnected the battery for 5 minutes and tried everything again. Outside air temp was between 99-104. Plenty of 60 mph driving. The guy couldn't fit his gauge on the fitting down by the compressor - pulley was in the way, but he hooked to the upper fitting. This is where he said he got the 31 reading. When I had a little 134 added a month ago, guy said he added some dye so he could see leaks.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #4  
Old 07-21-2011, 07:36 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,854
See if you can feel the hot water lines near the little pump/motor near the battery. Are the ones that feed the heater core hot? May be the pump/motor assembly needs to be checked out.
__________________
Jim
Reply With Quote
  #5  
Old 07-21-2011, 07:41 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
Lines going from water valve to heater core are warmish, not hot. Lines into water valve are HOT.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #6  
Old 07-21-2011, 07:42 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,062
I'm not familiar with the 95 a/c system and fitting locations... I find it hard to believe there are two low pressure fittings on it. is 31 a pressure reading or temp reading?
__________________
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 07-21-2011, 07:45 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,062
it could be a "podectomy" issue, or a refrigerant issue.
the compressor should not "cycle" it's also possible you have the classic evaporator failure issue. I'd take it to another shop, and have them test it properly.
__________________
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
  #8  
Old 07-21-2011, 07:49 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
Quote:
Originally Posted by vstech View Post
I'm not familiar with the 95 a/c system and fitting locations... I find it hard to believe there are two low pressure fittings on it. is 31 a pressure reading or temp reading?
Not sure John. I'm in the deep end now. Gotta have that a/c so I'll take it to the dealer tomorrow. I'll report back...hopefully not with bad expensive news.

Something is telling me that its that damn climate control unit. I had 3 of them before I bought the reman unit. I just don't trust them.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #9  
Old 07-21-2011, 07:59 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,854
The low side fitting should be out in front of the brake master cylinder 12 to 18". The one near the a/c compressor is the hi pressure side.
__________________
Jim
Reply With Quote
  #10  
Old 07-21-2011, 08:02 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
The carquest guy could only get connected to the Low side. Number when engine and a/c ON was 31. I assume it was psi.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #11  
Old 07-22-2011, 04:41 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
Dealer found traces of dye and determined its leaking at the evaporator. Dealer wants $4200 for the job. Yeah, right. Now what?
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
Reply With Quote
  #13  
Old 07-22-2011, 06:30 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,062
evaporator...
http://www.peachparts.com/search.htm?cx=015238323195528004774%3A_wneywo5nvm&cof=FORID%3A9&q=124+evaporator+&sa=Search&siteurl=www.peachparts.com%2Fshopforum%2Fforumdisplay.php%3Fs%3D%26daysprune%3D%26f%3D15#1075
__________________
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
  #14  
Old 07-22-2011, 06:50 PM
piccolovic's Avatar
OLD LADY
 
Join Date: Jun 2002
Location: FL
Posts: 777
Get the estimate

Get the estimate from the stealership, itemizing what will be replaced and what labor needs to be done to get it working. Then get a local to do it after you order the parts through here or local supplier that will be much cheaper than the stealership's prices . . . or of course, do it yourself.
__________________
1983 300D, the "Avocado"
1976 240D, 4-spd the "Pumpkin", SOLD to Pierre
1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002
Reply With Quote
  #15  
Old 07-22-2011, 06:58 PM
Registered User
 
Join Date: Jul 2003
Location: Northern Virginia
Posts: 1,070
Quote:
Originally Posted by leathermang View Post
' AT the evaporator "
or " THE Evaporator"
is leaking ?
Tech didn't indicate at evap or the evap. I told him to look for dye and he found it. That's when the service guy called with bad news. They don't want to do the job any more than I do.

Options: find someone to do it for less...gonna have to be a lot less; inject some sealer and hope for the barr's leak best; do it myself.

In the last few years I've done oil cooler lines, engine mounts, upper control arm, wheel bearings, vac pump rebuild, master cylinder replace, window regulator, brake hose replace, and rear axles on my 85 td.

On my 95 i've done engine mounts, water pump, water valve, fan clutch, master switch, trans cooler lines, glow plugs, power steering pump, window regulator, fuel tank replace, coolant flush, brake hose replace.

This 95 is a great car and I don't want to get rid of it, but I want the a/c working. I think I'm just gonna do it myself.

****ty news on Friday at 4:30 for sure.
__________________
2009 E320 Bluetec 108,000
1995 E300D 306,000 sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000
2016 Ford Fusion 14,900
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 09:56 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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