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Thread: If my thermostat is stuck open..

  
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    If my thermostat is stuck open..

    .....can it damage my engine??


    what does the thermostat in the engine do??


    I'm asking because i think mine may be stuck open, but its behind the timing belt, i'm going to change the timing belt, water pump and tensioner etc in 10k, will i be ok driving it around with the thermostat open?
    Observe the masses and do the opposite

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    If its stuck open then heat may build up whilst stationary but will of course go down when you start moving sometimes all the way down to the bottom of the scale.

    I'd imagine that you'd get hot and cold spots within the engine and items may not seal or may wreck the seals ect by one surface expanding and the other one very much not.

    The thermostat allows the engine to build up to an operating temperature before it opens to prevent the engine from overheating.
    Its a jam thing

    Haec credam a deo pio, a deo justo, a deo scito?



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    it only ever heats up to 90 degrees mate, never more, bit it does go quit cold quite often
    Observe the masses and do the opposite

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    open is ok, closed is the problem! open just means it wil run colder....

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    90 is about where mine gets to as well. But mines piping hot when the blowers are on hot and going like the clappers. Today it has been struggling to get there because of the temperature is so low and I've been on the move constantly without stopping and not using much accelerator.

    Your thermostat is behind the camcover? Funny place to put it? Mines at the front of the engine on the left as you look at it (Z16XE)
    Its a jam thing

    Haec credam a deo pio, a deo justo, a deo scito?



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    on the Z16SE its behind the timing belt mate, odd i know, but its a hell of a lot of work to change a 10 quid part, a lot of labour money, so i thought i'd wait until major service time and do the whole lot
    Observe the masses and do the opposite

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    Like Bufferz said mate if it's stuck open you'll have no problems ,
    And it will not get hot at any point as the water is not being kept in the engine by the thermostat allowing it to heat up ,
    So the water is constantly flowing through the whole system ,
    And the temp gauge would be at the bottom of the scale and the heater would be very poor to say the least ,
    The only bad efect would be is very poor fuel economy as the engine wouldn't reach normal running temp
    But seeing as youre gauge goes upto the 90% I would say the thermostat is working

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    If you are strugling with low temp gauge and a poor heater in this freezing
    weather you can block the lower grill in the bumper on the inside ,
    Use some thick cardboard cover it in gaffer tape to waterproof it and hold on with some cable ties ,
    This will allow the the engine to heat up quicker and stay at normal temp ,
    You will still have enough cooling through the bonnet grill BUT don't forget to unblock the lower grill when the weather warms up

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    It takes ages to heat up, but once it does it stays pretty warm (90 degrees) until i put my foot down a little big e.g. motorway then the temp guage comes right back to the bottom again,

    it goes up and down but never more than 90 degrees, should i be worried?
    Observe the masses and do the opposite

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    Quote Originally Posted by A51M View Post
    It takes ages to heat up, but once it does it stays pretty warm (90 degrees) until i put my foot down a little big e.g. motorway then the temp guage comes right back to the bottom again,

    it goes up and down but never more than 90 degrees, should i be worried?
    No mate

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