MAF Mass Air Flow meter and running Problems 2002 X5 Diesel - Page 2

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Thread: MAF Mass Air Flow meter and running Problems 2002 X5 Diesel

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    #11
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    Dave Midd's Car Details
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    sorry didnt mean to ignore the swirl flaps to be honest i was trying to take all this information in! what are thay? what do they do? and where can i find them/test them???
     
     

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    #12
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    Quote Originally Posted by Dave Midd View Post
    what are thay? what do they do?
    They live in your inlet manifold and fall out killing your engine and turbo in the process, they are supposed to improve emissions at low revs. They are a royal pain and I would hate to see you lose another engine. A dropped flap killed my friends X5

    .... Just to add to your worries

    Don't worry, feel free to keep asking questions, there are a few of us on here who know these engines well
     
     

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    If you do a transplant you should swop over the airmass,injectors and turbo

    You say you have changed the airmass for a new one
    Have you had the dde control unit reprogrammed for the new airmass if it was needed?

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    Quote Originally Posted by matthew_henson View Post
    They live in your inlet manifold and fall out killing your engine and turbo in the process, they are supposed to improve emissions at low revs. They are a royal pain and I would hate to see you lose another engine. A dropped flap killed my friends X5

    .... Just to add to your worries

    Don't worry, feel free to keep asking questions, there are a few of us on here who know these engines well
    Never heard of a flap killing a turbo and it's not necessarily the flap that destroys the engine but the things holding the flap in the manifold which fall in and do a lot of damage......It is a good idea to have them removed and blanking plates fitted however I think the OP has more immediate concerns to worry about.....
     
     

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    #15
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    thanks mathew i will ask the garage to check them first thing tomorrow
     
     

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    #16
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    Hi Jason! i text you earlier perhaps we can have a chat tomorrow as i do not know if the dde has been re programmed. cheers dave
     
     

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    Quote Originally Posted by StK View Post
    Never heard of a flap killing a turbo and it's not necessarily the flap that destroys the engine but the things holding the flap in the manifold which fall in and do a lot of damage......It is a good idea to have them removed and blanking plates fitted however I think the OP has more immediate concerns to worry about.....
    Was keeping it is simple terms, the precise failure mode is the swirl flap shaft breaking at the screw and short end of the shaft and screw failing in the cylinder.... however those screws do pop out the other side and if they hit a spining turbo they will wipe it out. Seen it happen here and elsewhere.

    The OP's car is at 150k, we have no idea what was transplanted or not and what the mileage of the old engine was, and as it is a high mileage 2002 model with 4mm swirl flap shafts, failure is almost ineviable. If he is remving things like EGR valves etc it is well worth while getting the swirl flaps blanked at the same time. It would be very painful to see so much effort and cost lost to a such a simple and common problem
     
     

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