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m43 water pump

Discussion in 'Z3 & Z3 M Roadster & Coupé Knowledgebase' started by swamper, Dec 12, 2011.

  1. swamper

    swamper Zorg Guru (V)
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    is there a quick check to see if its working.......?
    had to limp back today with an over heated engine......recently had problems with the thermostat failing (wich has been removed) and now today its overheated ....water pump?
     
  2. Canman

    Canman Regular Member
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  3. swamper

    swamper Zorg Guru (V)
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    i agree kev....when its running there seems to be no movement of the fluid...
    next one then.. where is it located on the front of the engine?..
    iv just bought a new one of ebay and a new thermostat..

    im just hoping is not knackered anything else up....seems to be a dripping from the radiator..
     
  4. Canman

    Canman Regular Member
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    yes front of engine, driven from auxillary belt. so suggest replacement belt at same time. should come with new 'o' sealing ring too for the pump. it jacks off using a securing bolt but take care as the casting is brittle and may snap. mine did but still managed to get the old pump out. mine was changed as a preventative measure. good luck :-bd
     
  5. swamper

    swamper Zorg Guru (V)
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    soz kev didnt make my self clear... which one on the front of the engine?
     
  6. Canman

    Canman Regular Member
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  7. swamper

    swamper Zorg Guru (V)
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    good find kev ;)
    i'll try that one first then.....it will all end up coming out..you know what im like for being nosy :))
     
  8. swamper

    swamper Zorg Guru (V)
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    well it looks like we have to resort to the 2 bolts to push this bad boy off...............iv just read an reply on another forum and it took the gut 3 weeks to get it out! he had to destroy it to move it lol.
    up to yet iv used the rubber mallet as per instructions........then hammer....then lump hammer......not a bean!
    next step is to find 2 holes in there that take 5 or 6 ml bolts that screw in and push this off....however this can brake the lugs off the side....!
    will resume this test of will another time...but has anyone had the same problems?
     
  9. Canman

    Canman Regular Member
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    yes mine cracked too. put some pressure on the jacking bolts and tap it with lump hammer :ympray: , then repeat . then swear . :-L
     
  10. swamper

    swamper Zorg Guru (V)
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    are the jacking bolts the same bolts that come out of it kev?
     
  11. Canman

    Canman Regular Member
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    yes i think so, but i got some longer ones to help with the jacking off :D
     
  12. swamper

    swamper Zorg Guru (V)
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    im dreading going in..lol
     
  13. swamper

    swamper Zorg Guru (V)
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    well its off but theres nothing wrong with it....now im baffled
     
  14. Canman

    Canman Regular Member
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    as it heats up maybe the impellor slipping on the shaft :-? or the belt slipping :-s
     
  15. swamper

    swamper Zorg Guru (V)
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    just ran it kev with the new pump on and all seems well.....will keep you updated :ympray:
     
  16. Canman

    Canman Regular Member
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    with thermostat ?
     
  17. swamper

    swamper Zorg Guru (V)
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    no.....they sent me the wrong one out....so iv removed the thermostat from the housing and also found the sensor inside it broken...so at the moment its running without any obstructions at all.....as you can guess it took a while to warm up...but i did get some heat in the matrix......i just need the correct thermostat sending out now and we'll see where we go from there
     
  18. swamper

    swamper Zorg Guru (V)
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    ok a little pic of the way i removed the water pump..
    when you remove the 4 screws if the pump wont budge try this..
    there are 2 holes at the top and bottom of the pump.....these take a 5mm thread if i can remember....just make a locking nut on them and take it nice and slow...top half turn then bottom half turn....and out it will pop

    thaks kev for the tip ;)
     

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