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Thread: Water pump....

  1. #1
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    Water pump....

    So how difficult of a job is it to replace the water pump? I swear this car is cursed.

  2. #2
    Noob
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    If you’ve done a timing belt then it shouldn’t take more than a few more minutes to pull the pump.


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  3. #3
    Some Boost
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    Quote Originally Posted by luxy72 View Post
    If you’ve done a timing belt then it shouldn’t take more than a few more minutes to pull the pump.


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    So, I have to do the timing belt again to replace the pump?

  4. #4
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    No, it;s an easy job. remove the belts, then the water pump pulley and then 3 bolts. The biggest trouble will be finding a water pump with the correct diameter pilot shaft.

  5. #5
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    Quote Originally Posted by Mike S View Post
    No, it;s an easy job. remove the belts, then the water pump pulley and then 3 bolts. The biggest trouble will be finding a water pump with the correct diameter pilot shaft.
    What is the correct diameter and part #?

  6. #6
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    Quote Originally Posted by majestic View Post
    What is the correct diameter and part #?
    The stock unit on my 86 was 3/4" with the v-groove pulley. The serpentine setup that I have from a 91 mustang is 5/8".

  7. #7
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    Quote Originally Posted by Mike S View Post
    The stock unit on my 86 was 3/4" with the v-groove pulley. The serpentine setup that I have from a 91 mustang is 5/8".
    Any preference on brand? RockAuto has several, including Motorcraft. I don't really car about the price as the most expensive one is under $50.

    https://www.rockauto.com/en/catalog/...ater+pump,2208

  8. #8
    Some Boost
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    All of the ones on rock auto including the Motorcraft unit has the 5/8"diameter pilot. I tried the Motorcraft one there and it came in the wrong size. I don't think you are going to find one with the correct pilot shaft. I tried autozone, Napa, O'rielly's and Advance and no one had the correct unit. You should double check the size of your unit before proceeding.

  9. #9
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    Quote Originally Posted by Mike S View Post
    All of the ones on rock auto including the Motorcraft unit has the 5/8"diameter pilot. I tried the Motorcraft one their and it came in the wrong size. I don't think you are going to find one with the correct pilot shaft. I tried autozone, Napa, O'rielly's and Advance and no one had the correct unit. You should double check the size of your unit before proceeding.
    Bizarre. So you had to end up converting to serpentine due to a bad water pump?

  10. #10
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    I'm sure this is a dumb question, but does the pulley just not go back onto the smaller pilot shaft for some reason?

  11. #11
    Some Boost
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    I just measured the one on the car and it is 5/8. So back to question on RockAuto. Is there any advantage to the Motorcraft over any of the others?

  12. #12
    Some Boost Laredo's Avatar
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    Quote Originally Posted by majestic View Post
    ...Is there any advantage to the Motorcraft over any of the others?
    Yes! If it's still available, BUY THE MOTORCRAFT!
    Far better quality than the Chinese knock-off rebuilds. And Motorcraft parts have 2yr/unlimited mileage warranty.
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  13. #13
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    Quote Originally Posted by Laredo View Post
    Yes! If it's still available, BUY THE MOTORCRAFT!
    Far better quality than the Chinese knock-off rebuilds. And Motorcraft parts have 2yr/unlimited mileage warranty.
    Well.... I ended up getting the Gates with the lifetime warranty. We'll see how it goes.

  14. #14
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    Quote Originally Posted by majestic View Post
    Bizarre. So you had to end up converting to serpentine due to a bad water pump?
    Correct.

  15. #15
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    Water pump

    Quote Originally Posted by Mike S View Post
    Correct.
    You can have your water pump rebuilt. Lots of companies doing it.

  16. #16
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    Quote Originally Posted by KevinK View Post
    You can have your water pump rebuilt. Lots of companies doing it.

    I still have my original to have it rebuilt in case my other '86 with the stock setup needs one. Is there one you recommend over others?

  17. #17
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    Well, that wasn't too bad. Pretty straight-forward job. I did manage to get the pulley back on before I noticed that I had not reinstalled the timing cover, so that added some time I don't know if it's related, but on burping the system, I notice that it doesn't get as hot on the gauge when the fan comes on. It will get to almost A on normal and then when the fan kicks on, it cools off much more quickly. Increased coolant flow?

  18. #18
    Red Captain MikeFleming's Avatar
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    Quote Originally Posted by majestic View Post
    Increased coolant flow?
    And probably less trapped air, and fresh coolant.
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  19. #19
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    Quote Originally Posted by Mike S View Post
    I still have my original to have it rebuilt in case my other '86 with the stock setup needs one. Is there one you recommend over others?
    I have not used any rebuilders yet. From the Concours Mustang Site:
    Automotive Friction
    Flying Dutchman
    http://vintageautopumps.com/
    http://www.waterpumpman.com/services.html

  20. #20
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    Quote Originally Posted by KevinK View Post
    I have not used any rebuilders yet. From the Concours Mustang Site:
    Automotive Friction
    Flying Dutchman
    http://vintageautopumps.com/
    http://www.waterpumpman.com/services.html
    Thanks

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