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Thread: Not VX but BMW overheating prob

  1. #1
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    Trim : SXi

    Engine : 2.2


    Default Not VX but BMW overheating prob

    The girlfriends car is giving me a headache big time

    Its a V reg BMW compact open air edition with the 1.9 engine

    Just recently its started overheating, head gasket is fine done a compression check on that

    I,ve flushed it and refilled, overheated
    Repaced the radiator core plug for the temp sensor as fan was not kicking in still overheated
    Hard wired fan in on setting one so it stays on all the time, overheated
    Took the thermostat out and running the car without it still overheating
    Wired the fan up on speed 2 still overheating

    Water pump appears to be pumping, and rad looks ok, head gasket fine

    Anyone got any ideas before I cremate in on a travellers BBQ

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    Quite common on some Bimmers (not sure if yours is affectted) for the engines internal waterways to fur up over time and become restricted. Have you always used good collant and de-ionised water? I.e. not tap water in the coolant system?

    Also I don't want to sound patronising, because you seem to know what your talking about but have you checked the themostat is opening? Its not on your list....

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    Trim : SXi

    Engine : 2.2


    Default

    Quote Originally Posted by mucklestone View Post
    Quite common on some Bimmers (not sure if yours is affectted) for the engines internal waterways to fur up over time and become restricted. Have you always used good collant and de-ionised water? I.e. not tap water in the coolant system?

    Also I don't want to sound patronising, because you seem to know what your talking about but have you checked the themostat is opening? Its not on your list....
    She has only had the car about 6 months so not sure what it has been run on but it has service history and 52k miles

    I took the thermostat out so if it was not opening this would eradicate the problem. You are right about some beemers having this problem though!

    Might be worth putting a rad flush through if the water jacket in the engine has become furred up, cheers did not think of that

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    I thought you'd have done the themostat, just you didn't mention it so I checked. I'd try flushing it. I'd put a higher concentration in and change it again, I mean what else can it be? You've tryed everything else! (are you sure water pump is pumping at full preasure?)

    Also full service history doesn't mean a thing!

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    Trim : SXi

    Engine : 2.2


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    Quote Originally Posted by mucklestone View Post
    I thought you'd have done the themostat, just you didn't mention it so I checked. I'd try flushing it. I'd put a higher concentration in and change it again, I mean what else can it be? You've tryed everything else! (are you sure water pump is pumping at full preasure?)

    Also full service history doesn't mean a thing!
    I,m wondering if its the water pump as it will be ok for a few days then suddenly overheat maybe the vanes are broken apparantly a weak part on the pump as they are made of plastic

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