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  •  » Issue with water pump pulley

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    2/06/2020 3:53 PM  #1

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Issue with water pump pulley

    Fired up the 331 today.  Within about a minute broke the power steering belt.  Picked up a new one and during install noticed that the water pump pulley is rubbing the balancer pulley.  Everything is the same except the water pump.nice aluminum high flow. Probably made in China.

     

    2/06/2020 4:02 PM  #2

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,514

    Re: Issue with water pump pulley

    Man, that sucks.  Reverse rotation or standard? 

     

    2/06/2020 4:46 PM  #3

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Standard.

       •Thread Starter
     

    2/06/2020 9:11 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,282

    Re: Issue with water pump pulley

    That water pump did not make the pulley larger!  Are the pulleys a matched set that were in use together previously?

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    2/06/2020 10:31 PM  #5

    Hornman
    Senior 24-7 FYI Addict

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    From: Mansfield, Texas
    Registered: 4/01/2013
    Posts: 1,568

    Re: Issue with water pump pulley

    Wait a minute. A high flow water pump has a larger impeller, which means the pump shaft was probably moved downward to fit the larger impeller within the constraints all around. Lowering the water pump shaft reduces the clearance. 

    If the pulley interference is not too bad the outer edge can be turned down 20-30 thousands for clearance.

    If a smaller water pump pulley is installed that will speed up the water pump even more.

    Last edited by Hornman (2/06/2020 10:33 PM)

     

    2/07/2020 9:24 AM  #6

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Michael Morrow is going to turn the pulley down for me.

       •Thread Starter
     

    2/08/2020 12:59 PM  #7

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Shaved. 040 off water pump pulley. Seems to fit ok now.

       •Thread Starter
     

    2/08/2020 1:00 PM  #8

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Yes MS everything is the same except the water pump.

    Last edited by Steve-G (2/08/2020 1:16 PM)

       •Thread Starter
     

    2/08/2020 1:47 PM  #9

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,282

    Re: Issue with water pump pulley

    I have never heard of a water pump that relocates the shaft downward.
    What brand pump?

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    2/08/2020 6:08 PM  #10

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Supplyed by the customer.  Not sure of the brand.  Visual was a perfect match.  Had Michael turn down the pulley. 040 today now all seems good.

       •Thread Starter
     

    2/08/2020 8:07 PM  #11

    Hornman
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    From: Mansfield, Texas
    Registered: 4/01/2013
    Posts: 1,568

    Re: Issue with water pump pulley

    In the interests of science: what is the diameter of the pump pulley after trimming?

     

    2/08/2020 8:48 PM  #12

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,282

    Re: Issue with water pump pulley

    Realistically, a water pump could probably be repositioned on the timing cover 0.040” by loosening all the bolts and moving it up a little.  Probably enough slop in the bolt holes.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    2/08/2020 9:42 PM  #13

    mustangermike
    Administrator

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    From: Cleburne
    Registered: 4/13/2017
    Posts: 204

    Re: Issue with water pump pulley

    True, but then you wouldn't have the fun of turning down a water pump pulley on a lathe!

    Owner of MustangSteve - 1967 Mustang Coupe 302, 2005 Mustang GT
     

    2/08/2020 10:13 PM  #14

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,282

    Re: Issue with water pump pulley

    Did the pulley have a double wall thickness at the OD?

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    2/09/2020 9:25 AM  #15

    Steve-G
    I FYI 24-7

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    From: Glen Rose,TX
    Registered: 4/01/2013
    Posts: 544

    Re: Issue with water pump pulley

    Yes the pulley was thicker on the outer lip.

       •Thread Starter
     

    2/11/2020 9:46 AM  #16

    DC
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    From: Marshall, MI
    Registered: 4/01/2013
    Posts: 1,251

    Re: Issue with water pump pulley

    I used to slot the holes on the old MG water pumps so my larger pulley(slowed down the pump) would fit and made the slots log enough to tension the belt without an idler. I had eliminated the generator and ran on the battery. Race car duty! 

     

     

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