Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
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  1. #17541
    Join Date
    Apr 2012
    Location
    Hereford, AZ
    Posts
    1,081
    I too went OEM for the composite impeller and reasonable cost. I'll just replace it again at another 80k interval if I have the car that long. And I will, unless I replace it with a lower-mileage one at some point.

    '21 M2 Competition
    '08 Z4 M Coupé
    '19 Golf R

  2. #17542
    Join Date
    Jun 2012
    Location
    Montreal, Canada
    Posts
    1,939
    Just dropped it off at my upholstery guy for driver's seat repair!
    Alex'16 Melbourne Red 328d Touring
    M Sport + M Performance Package

    Gone, but not forgotten: '03 Imola Red 330i ZHP - 6MT


  3. #17543
    I have had the stewart water pump since I bought my car and over 100,000 miles later no hiccups, knock on wood.

  4. #17544
    Join Date
    Jan 2014
    Location
    SoCal
    Posts
    146
    I'm not so much worried about the bearing going out since I can hear that and replace relatively quickly in my driveway. My bigger concern is the plastic impeller in a cooling system which routinely heats up to high temperatures. My first e46 overheated and when we pulled the water pump we found a melted plastic impeller. Not sure if the bad impeller caused the overheating or if it was a byproduct of the high temps but I switched to metal design on that and current ZHP ever since. Besides, the plastic impellers have bearings too, right?
    Going on 20k miles on this one with no problems yet.

    Sent from my XT1585 using Tapatalk

  5. #17545
    Join Date
    Jan 2016
    Location
    Chicago area
    Posts
    1,920
    The ZHP I bought had 100,000 miles on what apparently was the original cooling system. At least the mechanic thought so.

  6. #17546
    Join Date
    Jul 2011
    Location
    North San Diego, Las Vegas
    Posts
    1,959
    Seems that OEM BMW water pumps are all refurbished and packed in BMW packaging. And all are metal impellers.
    Lawrence
    "But Mama....That's where the fun is!"
    BMW CCA #192742
    San Diego & Sin City Chapter
    NRA Lifetime Member

    STABLE
    '90 M3 AWII - Garage Queen (The Crown Jewel)
    '20 X5 M Sport Tourquis Blue - #3 Son Ride
    '23 X5 M Sport Sapphire Black - #1 Son Ride
    '23 X5 M Sport Mineral White - Daughter & Grand Kids Ride
    '24 X4 M40i Brooklyn Grey - SO's New Ride
    '05 330i ZHP Mystic Blue Metallic 6 spd - My Ride
    '03 Nissan Frontier XE Crew Cab - Hauler & Down Range vehicle

  7. #17547
    Join Date
    Jan 2016
    Location
    Helena, AL
    Posts
    633
    Quote Originally Posted by das boots View Post
    Seems that OEM BMW water pumps are all refurbished and packed in BMW packaging. And all are metal impellers.
    The 2 I bought this year, both OE Genuine BMW, one from Fischer and one from FCP, were remanufactured and metal impellers.

    Frank W.

    Present
    2003 BMW 530iA Saphirschwarz Metallic

    Past
    2006 BMW 330ci ZHP 6MT Silbergrau Metallic
    2014 BMW X1 xDrive35i ///M-Sport Mineralgrau Metallic
    2011 BMW 328i 6MT ///M-Sport Alpenweiss
    1999 BMW ///M Roadster Estorilblau Metallic


    plus an assortment of VW, Honda, Mazda, Chevrolet, Nissan, Toyota, and others over the years


  8. #17548
    Join Date
    Jan 1970
    Location
    Branford, CT
    Posts
    16,055
    Quote Originally Posted by Damian View Post
    I'm not so much worried about the bearing going out since I can hear that and replace relatively quickly in my driveway. My bigger concern is the plastic impeller in a cooling system which routinely heats up to high temperatures. My first e46 overheated and when we pulled the water pump we found a melted plastic impeller. Not sure if the bad impeller caused the overheating or if it was a byproduct of the high temps but I switched to metal design on that and current ZHP ever since. Besides, the plastic impellers have bearings too, right?
    Going on 20k miles on this one with no problems yet.

    Sent from my XT1585 using Tapatalk
    The original design with the plastic impeller was obviously a faulty design. They've changed the design to a metal impeller, which had the bearing issues due to the metal material, probably from it being heavier and stressing the bearing more. The final design with the composite impeller, which is where it has been for the last few years, has proven to be a reliable design.

    Not sure why the rest of you are getting metal impeller units as the OE remanufactured - my OE remanufactured unit that I just bought has a composite impeller.

    Sent from my LG V10 on Tapatalk
    BP
    2005 330i ZHP / 6MT
    Imolarot / Naturbraun
    2003 330iT / 6MT
    Orientblau / Naturbraun




    It's not the car you drive, it's how you drive it.

  9. #17549
    Join Date
    Oct 2014
    Location
    Woodbury, MN
    Posts
    456
    Ordered a Stewart and a new thermostat. I have had them in 2 of my E36M's and they worked flawless.

    I also ordered some JRZ RS2s for my M3. I can't wait to get those and the M-Performance exhaust on the car! Next is a MPerformance flat bottom alcantara wheel and MPerformance CF trim.

    I went to look at an M2 as well. I would rather get an F80 M3 over that.
    -Chris

    -11.5 Jerez Black M3/4/6 (ZCP, slick top, cloth, manual seats, no nav)
    -16 GT3 GT Silver
    -02 Saleen S281 Extreme #35
    -2017 F350 Platinum

    Instagram: CCOHO93

  10. #17550
    Join Date
    Jul 2011
    Location
    North San Diego, Las Vegas
    Posts
    1,959
    Quote Originally Posted by az3579 View Post
    The original design with the plastic impeller was obviously a faulty design. They've changed the design to a metal impeller, which had the bearing issues due to the metal material, probably from it being heavier and stressing the bearing more. The final design with the composite impeller, which is where it has been for the last few years, has proven to be a reliable design.

    Not sure why the rest of you are getting metal impeller units as the OE remanufactured - my OE remanufactured unit that I just bought has a composite impeller.

    Sent from my LG V10 on Tapatalk

    I wonder if we can have the unused refurbished still in box be returned/exchanged with the composite impeller.
    Lawrence
    "But Mama....That's where the fun is!"
    BMW CCA #192742
    San Diego & Sin City Chapter
    NRA Lifetime Member

    STABLE
    '90 M3 AWII - Garage Queen (The Crown Jewel)
    '20 X5 M Sport Tourquis Blue - #3 Son Ride
    '23 X5 M Sport Sapphire Black - #1 Son Ride
    '23 X5 M Sport Mineral White - Daughter & Grand Kids Ride
    '24 X4 M40i Brooklyn Grey - SO's New Ride
    '05 330i ZHP Mystic Blue Metallic 6 spd - My Ride
    '03 Nissan Frontier XE Crew Cab - Hauler & Down Range vehicle

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