If I am right in suggesting that a thermostat that fails to open correctly stops the flow of coolant from the engine to the radiator and that one which opens too soon or sticks open, or is missing altogether causes the engine to run cold because the engine coolant flows through the radiator at all times what is read on the temperature gauge depends on the location of the temperature sensor.
If a gauge is working at all and sensing the temperature of the coolant within the engine block there seems to be little possibility that the gauge would not respond in the same way as the sensor for the electric fan. If it is hot enough for the fan to run it must show on the gauge. On the other hand the temperature gauge might be monitoring the temperature of the coolant within the radiator or some other point between the thermostat and the radiator, thus showing a low temperature because of the thermostat failing to open. Thermostat test - I believe the time honoured test is to put it in a pan of water and bring it to the boil. T/C engines - RS turbo thermostats are designed to open at a lower temperature than those for n.a. engines. -----Original Message----- From: Susan and Martin Scott <[email protected]> To: quantumowners <[email protected]> Sent: Sat, 16 Jan 2016 19:03 Subject: Re: [Quantum Owners] Coolant thermostat Funny you shuld say that, as I thought I had the problem again...... however it just seems to be the gauge not moving, as the heater gets hot within a mile. For the last year the gauge has never gone above O on the NORM section of the scale, even when it's very hot and the fan comes on. I shall be getting the meter out, and earthing the wire as a test once we have some spring weather. Martin ----- Original Message ----- From: "Derek Clews" <[email protected]> To: "Quantum Owners Club" <[email protected]> Cc: "Derek Clews" <[email protected]> Sent: Saturday, January 16, 2016 5:07 PM Subject: [Quantum Owners] Coolant thermostat Hi All, I have fitted various thermostats in the past and most seem to control the coolant temp fine for a few months and then get colder and colder until the running temp hits the bottom of the gauge. Occasionally one I have had runs for years and is fine. I recall there was a thread about this some time ago, what was the outcome? Is there a particular make we need to buy? At present I have one of each in the two Q’s so see the direct comparison every week as I drive one then the other, so I know I am not just imagining it! Derek -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout. -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
