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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-21-2003, 02:30 PM
smw
Guest
 
Posts: n/a
Vent System & Overheating - 1979 450 SLC

I have a 1979 450 SLC that I just purchased. I do not have complete maintenance records. Air only moves through the far left and far right vents and the defrost vents. No air comes throught the center 3 vents. Air only moves through the operating vents when the a/c is on. Are there electronically controlled baffles that redirect the airflow? Maybe a vent connection was accidentally disconnected? There is also a problem with the car running hot. I know that work was performed on the cooling system prior to my purchase without success. I have to assume that the mechanic checked the obvious (i.e., thermostat, blockage, etc.). I tested the antifreeze and it is up to par. It was mentioned to me that this could be related to the timing chain???? Do you think there is a relationship in someway between the two problems.

THanks.
Reply With Quote
  #2  
Old 08-22-2003, 12:01 AM
Registered User
 
Join Date: Jul 2003
Posts: 78
Running hot, bad emissions...

I'd check to see if the ignition timing is correct (sufficiently advanced).
Reply With Quote
  #3  
Old 08-22-2003, 09:15 PM
Registered User
 
Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
The AC problem is probably vacuum related, the flaps are moved by vac.

Start checking vacuum lines in the engine compartment -- the green plastic lines are for the climate control. You will find that the rubber hose parts that connect the plastic lines are all shot unless replaced recently.

Have a care with the plastic tubes, they will be brittle by now.

Try applying a vacuum to the green line and see if the climate control then works properly -- the fan is switched off if there is no vac in the system.

A large vac leak can make the engine run lean, causing overheating, but I'd bet on a clogged radiator myself, given the age.

Peter
__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
Reply With Quote
  #4  
Old 08-22-2003, 09:51 PM
smw
Guest
 
Posts: n/a
I appreciate the input. I obviously have some work to do - - when I can find the time. Lucky that this is not my primary transport.
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 11:29 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page