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Twingo Technical & Detailing Information
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Unexpected Orange Juice - Dom's Twingo GT
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<blockquote data-quote="oscar" data-source="post: 163408" data-attributes="member: 2757"><p>basically dom, when you start your car up the thermostat is closed.</p><p><img src="https://s10.postimg.org/p637knaeh/cooling_system_thermostat.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>it's a little needle and when the wax melts (at 89 degree celsius) and the spring overcomes the wax and lets the needle move to let coolant circulate from the engine to the radiator. it is a pressurised system, on average to around 1bar (14.7 psi) and for each psi you increase you will get an increase in boiling point by 3 degrees. pressure is maintained by the pressure cap offcourse and the actual pressure the GT's cooling system operates at can be found on the cap itself.</p><p></p><p>it would appear that your thermostat is opening and then closing again which isn't good as this isn't allowing coolant to circulate. my first thoughts are that you have air pockets in the cooling system, or a more remote chance of a stuck open thermostat which allows the car to run to cool all of the time. a stuck open thermostat would result in the car taking a long time to get upto temperature and a noticed increase in fuel economy as the coolant temperature is directly responsible to the fuelling. engine temperature (determined by cooling) has a big big part to play in deciding fuelling <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="oscar, post: 163408, member: 2757"] basically dom, when you start your car up the thermostat is closed. [img]https://s10.postimg.org/p637knaeh/cooling_system_thermostat.gif[/img] it's a little needle and when the wax melts (at 89 degree celsius) and the spring overcomes the wax and lets the needle move to let coolant circulate from the engine to the radiator. it is a pressurised system, on average to around 1bar (14.7 psi) and for each psi you increase you will get an increase in boiling point by 3 degrees. pressure is maintained by the pressure cap offcourse and the actual pressure the GT's cooling system operates at can be found on the cap itself. it would appear that your thermostat is opening and then closing again which isn't good as this isn't allowing coolant to circulate. my first thoughts are that you have air pockets in the cooling system, or a more remote chance of a stuck open thermostat which allows the car to run to cool all of the time. a stuck open thermostat would result in the car taking a long time to get upto temperature and a noticed increase in fuel economy as the coolant temperature is directly responsible to the fuelling. engine temperature (determined by cooling) has a big big part to play in deciding fuelling :) [/QUOTE]
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Unexpected Orange Juice - Dom's Twingo GT
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