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Thread: R56 thermostat housing split

  1. #1
    L Plates Harmchar's Avatar
    Join Date
    Mar 2018
    Location
    Peterculter, Aberdeen
    Car
    Mini Cooper S r56 2008
    Posts
    41

    Default R56 thermostat housing split

    That's me joined the list of owners that have suffered coolant loss due to split thermostat housing. What were MINI thinking making this out of plastic?
    Anyone know if there is an upgrade option to change to steel one. Bit of a long shot. But I would have liked to purchase an improved item instead of fitting like for like. Better than having the worry that it will probably happen again. Lucky I was only 1/4 mile away from house when the steam blew out. Might have known about it sooner if there was coolant temp gauge fitted in the car as standard. (like every other car I know about)
    Even with all its downfalls, still loving the MINI though.

  2. #2

    Default

    My header tank had a hairline crack in it. Had to rebuild my engine as it overheated and fried everything.


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  3. #3
    L Plates Harmchar's Avatar
    Join Date
    Mar 2018
    Location
    Peterculter, Aberdeen
    Car
    Mini Cooper S r56 2008
    Posts
    41

    Default

    Mine looks like it started as a leak from the coolant reservoir grommet that goes in the top of the rad. It's completely gone now. Can only assume I had been losing coolant over last few trips and it's overheated which caused the thermostat housing to split. Sitting in road works when it happened. Hoping the housing and grommet are the only problems. Won't find out till the new parts arrive on Tuesday and get the system topped up again.
    Hope I don't have an engine rebuild like you. Although a head decoke would be good.......

  4. #4

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    Took 6 weeks was a total nightmare.


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  5. #5
    Want More BHP!
    Join Date
    Mar 2014
    Location
    Aberdeenshire
    Car
    R55 Clubman JCW
    Posts
    225

    Default

    I just replaced a cracked thermostat housing.... well my local friendly mechanic did as I watched a few videos and figured my patience would run out.
    Fortunately I heard a bubbling after I came home one night so fingers crossed my topping up caught it before it did any damage.

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