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When you start the engine, the thermostat is closed. After the coolant warms up the thermostat begins to open up allowing coolant to flow thru the raditor. When first started the temp will go a little past what the thermostat is set to open at. After the water begins to flow thru the radiator, the temp will fall to whatever the thermostat is set at.
The thermostat holds the coolant in the engine until it warms up. As
soon as the engine is warm, the thermostat opens allowing cold coolant
outside the engine to mix with warm coolant. The temp drops, the
thermostat closes again, until all the coolant is warm.
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∙ 16y ago
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What would cause a 91 LSI and a 97 Metro both to not build engine temp at idle but will after working the engine temp will also go back down if leave idle again after driving car and engine temp up?
Check Coolant Level It Could Be Low. Also Sounds as If Your Thermostat Is Bad.
Why the antifreeze is leaking but the temp gauge is still within normal all the time?
The temp may not go up until the antifreeze leaks way down. Or the temp gauge may not be working right. The leak needs to be fixed, or the engine can overheat and cause permanent damage.
Why is the button not working on automatic gearshift Nissan 300ZX to allow car to go into overdrive?
I just read on another site, that the switch is controlled by the engine temp. It will not allow the Z to go into overdrive if the car is not up to temp. Could be the t-stat is stuck open or the engine temp switch is bad. Research engine temperature controls. Just a place to start.
2003 Pontiac grand prix no heat the temp goes up and then all the way down and then you get heat?
A malfunctioning thermostat can cause your temperature gauge to go up and then allow the gauge to go all the way down. When the thermostat is stuck closed, your engine will overheat and water will not get to your heater core. When the thermostat opens the engine cools down and water flows to the heater core.
How is right to start an ford escort TD 1997 engine Cold and Hot?
you have a diesel warming light on the dashboard display near the speedo,in the cold turn ignition on,let the warming light go out then count to ten,i have to do this twice to get mine to start on cold mornings,when engine is hot then just wait for the diesel warming light on the dash board to go out and that will do it,takes roughly 3 seconds to go out.
Why does your temp gauge go up and down did get new rad and changed thermostat?
yes
Is it normal for a 2004 Grand Prix engine temp to climb a few notches past half way when stopped in traffic and then go back down when you start rolling again?
Totally! It is normal for any car.
Your 2003 vw jetta is overheating and the engine light is staying on the coolant level is fine is this your thermostat?
Probably not. It could be the cooling fans, or the water pump. Does the temp go down to normal when you are going down the hwy? If so, its probably the fans. If the temp gets to 260 the fans should kick on, if not, I would look at the fan circuit, fan module, and fan assembly.
What happens to temperature as you go higher in the troposphere?
the temp goes down, the winds go up, and the pressure goes up...
My temp gauge won't go past the beginning of the normal mark I have replaced sensors and thermostat.?
Your cooling fans may be coming on or you might have a low temp thermostat. Either way, a cool engine is better than a hot engine.
Why would a Temp gauge go to hot?
First determine if the engine is really running hot if it is check to see if you are low on water, or could be the thermostat is not opening.The thermostat allows water to enter the engine block after it reaches a certain temp.
How do you know if water pump on a 1992 ford ranger is bad?
1. Remove the radiator cap.... Keep off the whole time! (when engine is cold) 2. Fill radiator completely 3. Start engine 4. Run until engine is at running temp (Fill again if needed, while it is running) 5. Rev engine and look into the radiator (Not too close, just try to see the level of the water go down when you rev the engine, If it does not go down it might be bad or the thermostat is not open. If it is at or above the temp rating for the thermostat and water level does not change, you have a bad water pump. If the level goes down when engine is reved up, and rises when you let off... The pump is good.) 6. Stop engine 7. Let it cool 8. Put Radiator cap back on
