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Changing out thermostat housing/antifreeze

Discussion in '2005-2010 V6 Mustang Tech' started by C9351c4v, Sep 29, 2018.

  1. C9351c4v

    C9351c4v New Member

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    Hi everyone I have a 2009 wip mustang. Thermostat housing is leaking. So I’ve purchased an aluminum housing (upped&lower) with thermostat off of eBay. So I have two 2 questions:
    1. Has anyone out there switched from plastic to aluminum? If so is there anything I have to look out for?
    During or after installation?
    2. When filling system back up with antifreeze, do I do the full jug no water or is there some amount of water I have to add?
    Yeah that last question is very novice. But this will be my first project to tackle. Never done this before. I appreciate all the info. Thanks again
     
  2. 08'MustangDude

    08'MustangDude Profile Violation

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    Nothing to look for, is a great upgrade so that won't happen again.

    You do not need to drain all the coolant, just let what leaks out from
    the job, leak out. Top off with the correct mixture of same type used.
    Unless you want to flush and fill, as a service... I buy 50/50 mix, and
    if YOU mix it, you must use distilled water. Make sure any mix you may
    buy says Distilled Water, and not just Water.

    Factory torque is 7.5 ft-lbs on the bolts, or 89 in-lbs. It may be tighter with
    the metal one, see if it has new specifications with it.



    Now, you do NOT need to drain all the coolant out, unless you need a
    service interval. SO, if you have like 80,000 miles on it, and never
    changed it, then may as well.
     
    jorez likes this.
  3. C9351c4v

    C9351c4v New Member

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    08’ Mustang Dude thank you for the info.
    As well as the torque specs. I had completely forgot about that. I’ll do as you say and release just enough coolant to get the job done. Thank you again
     
  4. alexzander

    alexzander New Member

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    have an 08 V6 with 110,000 miles on it with the factory plastic thermostat housing. Not leaking...….gulp......I hope I am not jinxing myself...…..gulp
     
  5. 08'MustangDude

    08'MustangDude Profile Violation

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    Mine is well over 110,000, no leaks yet...
     
  6. C9351c4v

    C9351c4v New Member

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    Take your time. Make sure all surfaces are clean and torque everything down correctly.
    Btw. A life saver for me was to buy some rubber hose lube. Made putting hoses back on very easy. Good luck
     
  7. 08'MustangDude

    08'MustangDude Profile Violation

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    I use silicone spray, always works.