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. |
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.
------------------ Benzmac: ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
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. |
Have you test coolant cap ?????
------------------ MB STARS Master Guild Technician,12 years MB tech 5 years independent shop owner |
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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