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  1. #1
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    Member No: 69301 oc330cic is an unknown quantity at this point oc330cic's Avatar
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    Water Pump Questions

    Since I was just working on my water pump, a couple of questions occurred to me.

    How does one hold the water pump shaft stationary while torquing the bolts for the pulley? And probably related to that, why is the end of the shaft threaded?

    I ended up just putting a pipe wrench on the shaft, which works okay since I only need to reach 10 nm of torque on the bolts, but it bothers me to scratch up the threads doing that.


  2. #2
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    As I recall holding the pulley by hand allowed me

    torque these pulley bolts to what I considered to be adequate torque.

    I have a manual transmission with an electric fan, but the auto trans cars have a non-electric fan which screws onto the left hand threads of the water pump shaft. When I did my cooling system, I sprung for the anodized Al shaft cap to cover the rusted shaft threads.

  3. #3
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    Member No: 136377 PKile is an unknown quantity at this point PKile's Avatar
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    Re: As I recall holding the pulley by hand allowed me

    Hey Stinger9,

    Where did you find the shaft cap you refer to? I would like to add one to my 330ci. I did the water pump, expansion tank and hoses about 10,000 miles ago, I have always been a little irked at the "unfinished" look of those threads on our cars. I don't have to worry about it on my Z3 coupe 3.0i though, those all have mechanical fans.
    Cheers,
    Paul Kile

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    Member No: 35540 TCACEK is an unknown quantity at this point TCACEK's Avatar
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    Re: As I recall holding the pulley by hand allowed me

    Ditto here. Just held it by hand. I do not remember it being much of a problem. Used torque wrench too.

  5. #5
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    I wish I could remember now

    I thought it was BMP or bavauto, but cannot find the cap at those sites now. I'll report back if I come across the info.

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