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  #1  
Old 02-26-2009, 05:20 AM
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W126 radiator over heat 90-100

Hi...i need some help.My mercedes w126 280se radiator over heat is around 90 when driving on highway.first time i think maybe i turn off the a/c maybe the temperature will not going to 90c,but also the same problem.when i idle the car without the a/c the temperature will slowly increase to 100c.if i running again will slowly decrease to 90c again.Anybody can help me for this problem?Thank You

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  #2  
Old 02-26-2009, 02:32 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
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replace the radiator,it is made of plastic and aluminium,over time the tubes in the radiator will shrink and not flow enough water to maintain temperature at correct level.been there many times.
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  #3  
Old 02-28-2009, 09:58 AM
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hi there,thank you.so this week i will send my car to repair.
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  #4  
Old 03-01-2009, 11:35 AM
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mercw126, before you go to the expense of replacing the radiator replace the thermostat and see if that resolves your overheating problem.
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  #5  
Old 03-01-2009, 09:02 PM
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Join Date: Jun 2007
Location: North Mississippi
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The radiator will be hard to locate as it is MUCH different from the USA version radiator. It is similar to the radiator in the Pre-126 model full size cars and may even interchange. The Euro cars DO NOT USE a recovery bottle. The radiator is made like and old Ford from the 60's. The thermostat is likely the cause of the problem. Being this is a Federalized Euro car as I gathered from your other post, the timing may have been fiddled with to get the car to meet emission standards and could also be causing heat related issues. I would check the timing and have it set back to European specs and get rid of the Federal crap if you can legally do so. My 280SE with no emissions is real fun to drive. Actually second guessing selling it it is so much fun.

Good luck,
Aaron
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  #6  
Old 03-01-2009, 10:14 PM
LUVMBDiesels's Avatar
Dead on balls accurate...
 
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Location: Red Lion,Pa
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If the temperature changes with engine speed check the coolant level and make sure that you burp the system before trying other fixes.

To burp the system, park it with the front facing uphill, open the filler cap, turn on the defroster and rev the engine up to 3000 RPM a few times...
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  #7  
Old 03-02-2009, 04:26 AM
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Hi there,the radiator and thermostat is no problem.The car temperature changes with engine speed if i driving fast temperature will decrease until 80.if i stop the temperature will increase until 90-100
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  #8  
Old 03-02-2009, 04:27 AM
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Hi there,the radiator and thermostat is no problem.The car temperature changes with engine speed if i driving fast temperature will decrease until 80.if i stop the temperature will increase until 90-100
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  #9  
Old 03-02-2009, 05:25 AM
LUVMBDiesels's Avatar
Dead on balls accurate...
 
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Quote:
Originally Posted by mercw126 View Post
Hi there,the radiator and thermostat is no problem.The car temperature changes with engine speed if i driving fast temperature will decrease until 80.if i stop the temperature will increase until 90-100

Sounds like low coolant to me....Did you check it?
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"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad
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  #10  
Old 03-02-2009, 05:35 AM
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hi luvmbdiesels...are you on the line now?may i have you msn messenger e-mail.so i can ask you directly?
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  #11  
Old 03-02-2009, 10:59 PM
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Dontcha love it when people want a diagnosis but won't check ANYTHING?

-tp

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