2004 E60 525d - coolant temperature - Page 2

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  1.  
    #11
    Dr of BMW
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    530kam's Car Details
    Model of Car:
    530d M Sport
    Year of Manufacture:
    2005
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    Automatic
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    Saloon
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    you might see the temp rise and fall by 2C but not much more, and this is not a sharp rise, more a steady one

    and when the car is running 88-92C is the common values
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    bmpower (19-07-2011)

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  4.  
    #12
    Dr of BMW
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    kwempe's Car Details
    Model of Car:
    530d e60
    Year of Manufacture:
    2004
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    Auto
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    I apreciate you are using the hidden menu while parked but are you using a diagnostic tester via OBDII port or the hidden menu to check this while you are actually driving? If you aren't doing it already, you can access the hidden menu, then start up and drive away . The only reason I ask this is that the only temperature I can think of rising very quickly indeed would be the charge air temperature.
    Assuming all is being check correctly though it most certainly won't be the manifold transfering the heat to the turbo or head but what might be happening is that by repairing a problem that caused you to have low exhaust back pressure at the manifold you may now have uncovered another fault with the EGR.
    Let me explain. Cracked manifold = reduced pressure before the turbo. Now repaired you will have higher pressure before the turbo, as high as it should be, to drive the turbo impeller and periodically vent some through the EGR valve.
    Imagine you had a problem all along with the EGR valve sticking open. Beforehand not much gas would pass through the cooler etc as the pressure was low. Now it is fixed though your much higher pressure would allow a much greater volume of gas to flow through the cooler (if the EGR valve was stuck open) and the cooler would be passing the heat from this gas into the cooling system.
    To summarize then, make double sure you are checking the correct temperature and then start with the EGR if overheating really is a problem after all.
    Let us know how you get on
     
     

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    bmpower (19-07-2011)

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