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Why is 2003 CTS Engine coolant temperature colder than thermostat set point?
Wiki User
∙ 14y ago
Possible that it has a bad temp control sensor (not sure if that is exactly what it's called). Is the 'check engine' light on because this would typically trigger a code? Pretty sure it's located near the thermostat which is under the intake manifold on the 3.2 liter. Check the caddy forum on their website. Lots of good info there.
Wiki User
∙ 14y ago
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Why does a vehicle have to have a thermostat in colder climates?
Engines are designed to operate at a given temperature, without a thermostat the engine will often not get up to the designated temperature. So it needs a thermostat to be sure that the engine will run at its optimum design rating.
What is the normal coolant temperature of a duster 360?
it all depends on your thermostat most likely 180 but you canall ways change it out with a hotter or colder one but i wouldn't
Why would the temperature fluctuate in a 2000 Dodge Durango?
I would suspect a slow reacting thermostat, or one that is not correct for your vehicle. The thermostat opens and closes to allow the hot coolant from the engine exchange with the cooler fluid in the radiator. When the thermostat sticks or reacts too slowly the temperature of the engine will rise above normal, then drop suddenly as the thermostat opens, then the temperature may dip farther down than normal as too much colder fluid is exchanged than is needed to maintain operating temp.
How does a thermostat that is mounted at the inlet to the engine and outlet side of the radiator work because when it opens it is then exposed to the colder water from the radiator?
The thermostat opens to allow the hooter fluid in the engine to escape to the radiator and be colled by the air passing thru the fins of the rad. It is then pumped via the water pump from the bottom of the rad back into the engine. I think you had your routing wrong. WHEN YHE ENGINE HEATS UP TO 180 OR 190 DEGREES DEPENDING ON THERMOSTAT.THE THERMOSTAT OPENS AND STARTS TO CIRCULATE IN RETURN COOLINS ANTI FREEZE.....HOPES THIS HELPS The inlet thermostat doesn't operate that much differently than the outlet thermostat does. Both allow the engine's coolant pump to pull in cooler coolant from the radiator when the thermostat first opens. The outlet thermostat will get less of the radiator's cooler coolant because it will have mixed to a greater degree with the hot coolant already in the engine. The inlet thermostat will be exposed to a relatively higher amount of radiator's cooler coolant and likely not open as much initially and not go through as many opening and closing cycles as all of the coolant in the system warms up. The bigger operational difference is that the inlet thermostat will have to have some means to sample the warmer coolant circulating in the engine via a dedicated bypass or other hose. The outlet thermostat will not need this because it is usually integral to the engine block coolant passages and readily gets warmed coolant routed to it.
1994 Legacy the warmer the day is the warmer the ac blows the colder the day is the colder the heater blows vehicle never overheats in summer but temp gauge will hardly budge in winter any ideas?
Could be a bad themostat not closing completely allowing coolant temperature to reach normal operating range. Thermostat at one time may have stuck in the closed position allowing engine to overheat and expelling refrigerant charge and now won't close totally Could be a bad themostat not closing completely allowing coolant temperature to reach normal operating range. Thermostat at one time may have stuck in the closed position allowing engine to overheat and expelling refrigerant charge and now won't close totally You may have two problems. AC may be low on Freon and in need on recharging. Engine temp is controled by a temp sinsitive thermostat inside the coolant system. Replace it for a few dollars and the problem may be solved.
Can a stuck open thermostat cause an evaporation of antifreeze?
A stuck open thermostat would make your engine run colder than normal. You'll see problems like your heater not working. Liquids can not evaporate to the point of loss in a sealed environment. Being that your coolant would run hotter under normal circumstances, this is unlikely.
Why does your engine temperature fluctuate?
The engine temperature fluctuates some what because the thermostat is opening and closing all the time to maintain the proper temperature, the cooling fans both mechanical clutch types and electric do not always run at full speed and in the case of electrical fans only run when the engine is getting to hot. Most electrical fans will turn on at about 220-230 degrees and off at around 200-210 so the engine will constantly be getting hotter and colder when the vehicle is not moving but should be more consistent when cruising since the fans are not required. Temperature fluctuations can also be caused by engine cooling system failures like a failing head gasket which will pressurise the cooling system and halt coolant flow causing the engine to overheat. If your engine is not overheating and your heater works fine no excessive white smoke out of the tailpipe and you have normal fluctuations then you shouldn't be concerned about it. You may also be low on coolant from a leak in the system.
Do you have have a thermostat in 1994 Lexus gs 300?
Your vehicle should have a thermostat. Since the invention of all of the emission systems monitoring, thermostats have been used to help the engine reach optimal operating temperature, and allow the oxygen sensor to function thereby controlling the fuel mixture. Also if you live in the northern colder climate you will not have sufficient heat if you do not have a thermostat.
Should i use straight coolant in the winter in my engine?
There is no need to use straight coolant in your engine in the winter. You can buy coolant premixed in any auto supply store. Unless you live in an area that is colder than average or stays below zero, that's what you should use.
Will no thermostat hurt the motor?
The function of the thermostat is an important one. When the engine is cold, the thermostat will let the cooling water circulate around the engine until it becomes sufficiently hot to enter the radiator. It opens at a certain temperature, and shuts when the temperature falls. If you remove the thermostat, the engine will take longer to warm up and may not get to the optimal running temperature, for example in cold weather or at night. The engine will in other words run colder than is ideal without a thermostat, and this will make the engine use more fuel. I am not sure if doing this will directly hurt the engine but it may do so over a long period of time. The only exception to this rule is some big motorcycles in tropical climates. The engines tend to become hot so quickly that removing the thermostat is sometimes done in order to prevent problems, such as a stuck thermostat. A stuck thermostat prevents the warm mater from entering the radiator and water pump and can cause the engine to overheat when the water starts boiling. This can also happen in cars of course but motorcycle engines are more vulnerable to damage and more costly to rebuild. It is a good idea to replace the thermostat every two or three years in a car to prevent a stuck thermostat.
Can a colder than normal thermostat temp have an adverse affect on a car?
Yes. It can trip a code and illuminate the check engine light. Today's engines are designed to run with a 195 degree thermostat.
1994 Pontiac Sunbird 2.0 engine When the car is warming up it has heat but after you drive it for mile you lose heat and it blow cold air have replaced the water pump and thermostat?
You will need to change your thermostat, as it is been stuck open. The thermostat is the piece that control the quantity of cooling fluid that goes to the radiator, if its stuck open all your fluid is going to be cooled by ambiant air on the radiator, and the engine will get colder then its operating temperature. If it close properly it will force the coolant to be cooled by the heater radiator, which transfer the heat to the air in your heater system. The piece itself is like 10$ or less, but the installation can be tricky if your not mechanicly inclined.
