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Re: rapidly rising temperature in 2000 Olds Silhouette
Could easliy be your water pump. The coolant in the radiator isn't being forced through the engine by the water pump causing the coolant to be cool and motor overheating. A thermostat can also cause this problem, but I belive it's the water pump.
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CarGurusAug 20, 2014 - Also as my temperature gage rises but car does not overheat. ... tempneedle gets up towards the red mark while you're driving, then yes, ... i have a 2006Pontiac Grand prix and my temp. goes up to the ... crzgrl637 answered 6 months ago ...the cooling fans won't kick on then you will see gauge over heat.
Make sure your cooling fans come on. If overheating at idle it is likely for the fans to have failed. While driving the air rushing through the grill cools the coolant in the radiator which is probably why it's fine while driving. You shouldn't drive the car if overheating as this will cause damage to the engine. Check fan relays, fuses and fans. If you turn the A/C on the fans should come on.
You need to check the fan on the radiator. Also check the nozzles for the input and output from the radiator. If the nozzle at the radiator inlet is not hot, then the problem is in the cooling system. If the nozzle from the radiator is hot, then the problem is in the radiator. Be careful not to burn yourself.
You did not mention replacing the thermostat. That's the first thing to do. May I ask what prompted you to replace the intake gasket and radiator? Was this due to a previous overheating problem? MOre information will be helpful. Thanks.
YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.
The coolant temperature should rise until the gauge indicated roughly half. if it continues to go until it reaches the red "H" shut the vehicle off and wait for the car to cool off. The most likely cause of this is the thermostat. It is a $4-$10 part and usually is easy to change. Thanks for asking!
When your temperature gauge reaches "H' it may too late to
prevent a major breakdown. Knowing the symptoms of an overheated car and how
they occur may be the difference between being inconvenienced and
incapacitated. Identification:---Other than a low oil level or low oil
pressure light, there is not a more significant part of a car's instrumentation
than a rising temperature gauge or a glowing "Hot" light. These
lights are really the only confirmation a driver has that his car is really
overheating. It is the identification of the symptoms of an overheating car
that enable the motorist to avert a badly damaged engine. Overheating is always
a traumatic event for a car's engine, which makes the early identification of
the symptom an important addition to the informed motorist's tool kit. Stuck Thermostat:--The car's thermostat is a valve that controls coolant
flow from the engine block to the radiator. When the engine is cold the
thermostat remains closed so that the coolant can reach operating temperature
quicker and also provide heat to the passenger's compartment. The thermostat
has a spring on it that moves depending on coolant temperature causing the
thermostat to open. Sometimes the thermostat fails to open thus restricting
coolant flow to the radiator where it would be cooled down. This condition is often
the cause of overheating. The symptoms of this cause would be a rising
temperature gauge and possibly the loss of heat inside the car. Restricted Radiator:---A car's radiator will have thousands of gallons of
coolant passing through in its lifetime. Along with the coolant comes
particulate matter in the form of corrosion breaking loose from various parts
of the car's cooling system. These contaminates collect in the tubes of the
radiator reducing its efficiency. Extensive "plugging" in the radiator
will cause the car to overheat. The symptom of this condition would be a rising
temperature gauge which goes up when you accelerate. Coolant Loss:--A car's
cooling system is a closed loop system. You are not supposed to lose coolant.
Sufficient coolant loss will cause the engine to run hot because engine is
heating less coolant to higher temperatures. The symptom of overheating induced
by coolant loss would be a pool of coolant on the pavement when the leak is
external. Steam under the hood as the lost coolant hits hot parts of the
engine, or a rising temperature gauge in the case of a undetectable engine
related leak. Of course, the gauge would also go up if the leaks were not
Deteriorated Water Pump:--Cars
use a belt driven pump to push the water and coolant mixture through the
cooling system. This part is called the water pump. Rarely the impeller that
draws the coolant through the pump will rust away making it impossible to push
any through the system. If this occurs the temperature gauge will climb and coolant
will boil over in the radiator.
cooling fans are electrically driven. Some are driven by fan belts. If a belt
breaks or the electric supply to the fan is interrupted overheating may result.
Electric fans are tuned on thermostatically when needed. When the car runs at
idle for extended periods or the weather is extremely hot, a failed fan will
cause overheating otherwise it serves as a standby assist to the rest of the
cooling system. In stress conditions an inoperable fan will cause the
temperature gauge to rise.
This will help. Thanks please keep updated.please please do rate the solution
positively .thank you for using fixya
Classic sign of a failed thermostat; it is not opening as it should when reaching its design point of 160-180 degrees F so very little is passing through a tiny hole to the radiator, leaving it cold to the touch.
If you remember the good ol' days, the temperature gauge would rise to a perdictable point and pretty much stay there regardless of ambient temps.
They can fail open too; then the engine never completely warms up and the gauge then wanders and your gas mileage tanks.
Just replaced one that didn't play fair since its failure was semi-random; sometimes it worked, sometimes not.
Your thermostat is being kind; it's stuck and this condition is crystal clear.
Perhaps if you could provide a little more information or observations, it might be easier to isolate the problem. For example, it appears you may have a problem with the engine overheating and then your engine dies when the extreme temperature is reached. When you start the engine, watch the temperature gage on the instrument panel. Does the temperature rise slowly (lets say over a period of 10 minutes or more) or does it rise quickly to the point of overheating (less than 5 minutes)? If the temperature rises slowly, it is probably just that the thermostat needs to be replaced. The thermostat is usually located in a housing where the upper radiator hose connects to the engine. If however, the temperature rises rapidly, that indicates a more serious problem. Your engine may have a blown head gasket which is venting hot exhaust gases into the cooling system causing the temperature to rise rapidly. I recently had this exact problem with my Chevrolet Venture which, like your Buick, is a GM product. As far as the fan motor not coming on, the problem might be the fan motor itself. One way to test it is to connect the fan's electrical leads to a 12 volt power source like your car's battery. If the fan works, then the problem could be with the Engine Coolant Temperature sensor (ECT) which screws into the intake manifold. The ECT senses the engine's temperature and tells the fan when it needs to come on to start cooling. I hope some of this helps.