2006 E350 Overheated with Coolant Reservoir Cap off
03-21-2017, 12:17 PM
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
2006 E350 Overheated with Coolant Reservoir Cap off
I am posting this thread for a friend who had a 2006 E350 M272 overheat with the coolant cap removed during traffic. The cooling system cap was not reinstalled after adding coolant and the car's dash during the commute had indicated temperature was critical and to shut the car down. The car was nursed back into the garage.
There is no coolant in the oil so we added enough coolant to top the reservoir up, close the cap and start it up. The engine still runs smooth with no signs of external leakage due to the overheat, but the fans are running at full speed despite the engine being cold (car sat for a day after the overheat).
Is this normal? What are the proper bleeding procedures so I can help get this car back on the road for them? I am very paranoid about head gasket failures so I will be keeping an eye on the car to make sure there was no internal failure where either water mixes with oil down the line, or compression leaks into the cooling system, causing pressurization and purging through the reservoir (another internal failure headgasket sign).
There is no coolant in the oil so we added enough coolant to top the reservoir up, close the cap and start it up. The engine still runs smooth with no signs of external leakage due to the overheat, but the fans are running at full speed despite the engine being cold (car sat for a day after the overheat).
Is this normal? What are the proper bleeding procedures so I can help get this car back on the road for them? I am very paranoid about head gasket failures so I will be keeping an eye on the car to make sure there was no internal failure where either water mixes with oil down the line, or compression leaks into the cooling system, causing pressurization and purging through the reservoir (another internal failure headgasket sign).
03-21-2017, 02:12 PM
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'71 Pinto
Coolant temp sensor “may” need replacement (part # 0009056102) definitive diagnose have someone pull/clear codes with MB DAS. See attachments.
Last edited by konigstiger; 03-21-2017 at 02:19 PM.
03-21-2017, 09:16 PM
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Update.
Car is now throwing P0116 (coolant temp sensor) and P2004 (intake runner stuck bank 1) codes.
Why is the code pointing to an intake runner after an overheat???
Car is now throwing P0116 (coolant temp sensor) and P2004 (intake runner stuck bank 1) codes.
Why is the code pointing to an intake runner after an overheat???
03-23-2017, 06:55 PM
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MBWorld Fanatic!
possibly something is going on with your intake tumble flaps... and you need a coolant temp sensor.
best way to get coolant out is to pull lower radiator hose, and or open drain plug and let it drain. Unless you have some machine that will push coolant out. It will never all get flushed from system. However to fill, you could just poor 50/50 mix in the expansion tank and gravity bleed it till it's full or get a vacuum bleeder for cooling circuits. GL
remember 50/50 mix. 1 gallon of straight concentrate mb coolant should/is enough.
best way to get coolant out is to pull lower radiator hose, and or open drain plug and let it drain. Unless you have some machine that will push coolant out. It will never all get flushed from system. However to fill, you could just poor 50/50 mix in the expansion tank and gravity bleed it till it's full or get a vacuum bleeder for cooling circuits. GL
remember 50/50 mix. 1 gallon of straight concentrate mb coolant should/is enough.
07-18-2018, 02:37 PM
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2006 BENZ E350
P2004 - broken intake manifold valve link. Damage - incorrect MIX causes overheat. Overheat could cause transmission malfunction (limp mode, or failed turbine speed sensor etc.)
P0116 (coolant temp sensor) - is likely due to overheat.
Solution - I replaced the intake manifold (the root cause of overheat), replaced all spark plugs (they are damaged by overheat), added additional transmission cooler.
OCMANGO
========
2006 E350 Sedan (155K Mi)
P0116 (coolant temp sensor) - is likely due to overheat.
Solution - I replaced the intake manifold (the root cause of overheat), replaced all spark plugs (they are damaged by overheat), added additional transmission cooler.
OCMANGO
========
2006 E350 Sedan (155K Mi)
