Gates vs Motorcraft Water Pump

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by Shadow351, Oct 11, 2017.

  1. Shadow351

    Shadow351 SHO Member

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    Hello All,
    I think I need to replace the Oil Pump (See https://shoforum.com/index.php?threads/oil-pressure-warning-at-idle.136523/) and I figure the water pump is on borrowed time, so I plan to change that while I'm in there. So I was going through making a parts list on the Ford Parts site and the water pump, (listed as PW-495 for both the SMPI and Ecoboost 3.5L), is $120 from Ford. I checked Rock Auto, which lists PW-538 for the SMPI 3.5L, but there is no Motorcraft pump listed for the Ecoboost. On the PW-538 info page, it lists PW-495 as an alternate\OEM part number. RA also has a Gates pump for the Ecoboost for $25 (the Gates pump for the SMPI 3.5L is a different part number and is $47).

    Is there actually a difference between the water pumps on the SMPI and the Ecoboost? Is the Gates pump for the Ecoboost any good? I've heard good things about gates water pumps, but the $25 price makes me a little leery. Should I just pay the extra $100 for the listed Motorcraft part from Ford? Or will the PW-538 listed for the SMPI 3.5L (priced at $67) work on my SHO?

    Thanks
    -Brad
     
  2. glockcoma

    glockcoma SHO Member

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    I would stick with the Motorcraft, this is not a job you want to do twice considering the difficulty.
     
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  3. SilverSH0

    SilverSH0 SHO Member

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    I would also stick with Motorcraft. IMO, spending an extra $100 is worth being sure you're getting a good pump. I wouldn't want to spend the time replacing the pump twice or worse....having the Gates pump fail and ruin the motor. I don't know a single thing about the Gate pump to know if it's good or bad. But like you, the cheap price would be enough to scare me away on an item like that.
     
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  4. Shadow351

    Shadow351 SHO Member

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    I actually stumbled across a Motorcraft water pump with the correct part number on Amazon for $67, so I will get that one. Does anyone lnow if the pump is actually different between the ecoboost and NA 3.5L?
     
  5. Devin

    Devin SHO owner

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    Isn't the MC pump the one that fails and kills engines?
     
  6. SHOdded

    SHOdded SHO Member

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    Yes, usually after 100K miles or more. Just like engine oil, the coolant and pump are more stressed with city/special operating conditions type driving, so probably somewhere between 100K and 150K the pump can fail. With highway driving/normal conditions, it SHOULD easily last 150K and beyond. We have many Edge vehicles for example well north of 150K, some well north of 200K, where the original pump is going strong. Regular coolant change (say every 5/60) is a big help, as coolant has additives that get used up, just like engine oil.
     
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  7. SilverSH0

    SilverSH0 SHO Member

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    I don't think that's a fair implication you're making. MC pumps are the ones that fail and kill engines simply because they're the ones that are installed from the factory. Water pumps are going to fail regardless of brand, that's what happens to them. I don't know a single water pump manufacturer that can make a pump reliably last past 150k miles. The engine failure part is simply based on bad design choices from Ford and there's no way to get around that.

    My statement is that I would have more trust in the MC reaching 150k miles vs the Gates pump. Everyone does their own thing, but I would be a lot more comfortable trusting my engine on a pump with a well known reliability limit vs on that's not well known.
     
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