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  #1  
Old 07-07-1999, 05:43 PM
gkk
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After having the engine rebuilt due to overheating when I start the car the coolant temp rises to 110 deg. and then down to 90-100 deg. and looses coolant. The heads were skimmed and new gaskets fitted during the rebuild. I have fitted a new radiator, and I have tried three Mercedes thrmostats!

Any ideas appreciated, Thanks.
  #2  
Old 07-07-1999, 11:04 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Do you know where the coolant is going? Is it coming out or being consumed? There is a block check tool that can be purchased at NAPA. It checks for hydrocarbons in the coolant. You open the coolant tank and put on the tool that has a chemical in it. As the engine heats up you pull air through it and if the blue chemical turns yellow, it has a combustion leak into the coolant. Where? That has to be determined.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
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MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM


  #3  
Old 07-08-1999, 11:43 AM
gkk
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The coolant is being expelled from the expansion tank vent when the radiator cap lifts as the temperature rises. Once the thermostat is open the temp returns to 90-100 deg. What is the circulation route when the thermostat is closed and could there be a blockage?
What or where is NAPA?
Thanks.
  #4  
Old 07-08-1999, 12:16 PM
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Join Date: Apr 1999
Location: Walnut,CA,USA
Posts: 554
Have you test coolant cap ?????


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MB STARS Master Guild Technician,12 years MB tech
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  #5  
Old 07-08-1999, 09:59 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The cap is rated at 1.4 bar, have it checked if it is OK, you may need a new radiator or fan coupler.

------------------
Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM




[This message has been edited by Benzmac (edited 07-08-1999).]
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