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Coolant hose clamps one time use?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by boredazhell20, Jul 24, 2015.

  1. boredazhell20

    boredazhell20 New Member

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    Well I just replaced my radiator in my 05 Prius.

    Almost every single inlet and outlet hose on the radiator is seeping. Are these hose clamps that toyota puts on one time use?

    Well I am replacing them all with standard hose clamps.

    PITA!

    BTW: I documented this procedure. If anybody needs help with this let me know.
     
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Odometer reading?

    What was the problem with the radiator that necessitated its replacement - an accident impact, or just a failure due to age?

    Did you also replace the hoses? If not I am not surprised that there would be some leaking if the rubber has aged and become somewhat brittle.

    Yes, the hose clamps should be replaced. I advise caution if you are using clamps that have a screw to tighten as they may not exercise a uniform clamping force across the clamp.

    By all means, please post your photos and documentation regarding the replacement process.
     
  3. boredazhell20

    boredazhell20 New Member

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    The radiator went out due to age. One of the seams on the top started to leak. It was near the bleeding valve on the driver side of the radiator.

    Yea i went with the industrial clamps with the 8mm tightening bolt. I used them for all sort of cars and had no issues. I just tighten by hand and once it stops I do a 1/4 of a turn. Kind of like spark plugs.

    I should have a video of the whole procedure. It was easy but very time consuming for all the coolant to drain and the steps to refill coolant for the engine and inverse coolant. It was a bit messy too and got coolant everywhere.
     
    Patrick Wong likes this.
  4. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Regarding engine coolant refilling, I found that the yellow Lisle funnel is an excellent choice. It helps when purging air out of the engine coolant loop, and there is no need to spill any coolant when the funnel is in place.


    Considering that Toyota SLLC costs ~$25 per gallon, there is no point in wasting it on the ground.

    My discussion regarding 2G engine coolant replacement can be found in posts #22 and #42 in the following thread:
    Changing engine coolant | Page 2 | PriusChat
     
    #4 Patrick Wong, Jul 24, 2015
    Last edited: Jul 24, 2015
  5. Avi's Advanced Automotive

    Avi's Advanced Automotive Independent hybrid repair shop

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    In my opinion, the clamps are reusable, however, the hoses are not. After 10 years of being mated to a pipe, I would expect the rubber hoses to have hardened and/or conformed to the pipe. Now, when you connect the hose to a different pipe, the rubber doesn't seal properly.

    Whenever I change a radiator, the hoses get changed as well, especially if they are well aged. I also like reusing the spring type clamps as they always provide tension, unlike the screw type.

    Avi
     
  6. boredazhell20

    boredazhell20 New Member

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    I think the only issue with the engine coolant I came across is trying to get the thermostat to open. Took forever to get the engine to a hot temperature (electric motor running and the engine is so small).

    Also my car has 140,000 miles.

    I'll look into that funnel. Looks like it will be useful in the future.
     
    #6 boredazhell20, Jul 24, 2015
    Last edited: Jul 24, 2015
  7. boredazhell20

    boredazhell20 New Member

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    I think you are right. I did notice the part the old clamps clamped on, was a bit stiff.

    FYI I used a aftermarket Denso radiator. I think you are also right with the new pipe it has a slightly smaller diameter. The hose went on way too easily. It's like they are 1mm smaller than the OEM.

    Well I already started to use the new clamps and they are working great. Took the car for a 5 mile hard run and no more leaks.

    [QUOTE="Whenever I change a radiator, the hoses get changed as well, especially if they are well aged. I also like reusing the spring type clamps as they always provide tension, unlike the screw type.

    Avi[/QUOTE]

    I never like those spring types, but your opinion on them above is a really good point. Those screw clamps can break a tightening notch, causing them to become a bit less tight over time.


    What's the best way to access the engine inlet radiator hose (from the engine). It's tucked all the way in there. I didn't really investigate on how to get back there since replacing the hose wasn't an option I considered.
     
    #7 boredazhell20, Jul 24, 2015
    Last edited: Jul 24, 2015
  8. Mendel Leisk

    Mendel Leisk Senior Member

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    Eric the Car Guy (YouTube automotive guru) cautioned against using screw clamp too, saying they can even crack the pipe that the (typically plastic) hose is pushed over, due to concentrated pressure at the screw point.