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Full of coolant sometimes runs at normal operating temps. Out of the blue trmperature gauge rises dramatically to nearly hot range.any suggestions? possible water pump? faulty temperature gauge?

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Either thermostat or water pump impeller drive shaft

Posted on Jul 28, 2010

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Temp/gauge not reaching normal working temp-richer


the first thing to check is to feel if the radiator is hot, if the radiator feels hot and the engine is also hot the coolant is circulating ok then the problem is more than likely electrical, the temp gauge gets its signal from the engine control module the coolant temp sensor sends coolant temp signal to engine control module for engine managment purposes then passes it to instument pack/gauge, if the sensor was at fault you would have engine running problems also,with poss fault codes logged, if the engine and rad are cold/only warm after the engine has been run for 15 mins or so it sounds like the thermostat is stuck open but you have changed that. i have had faulty new ones in the past and have had to test them in a pan of boiling water, hope this is some help to you.

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1 Answer

99 continental temp gauge not rising


Usually a sign of a faulty thermostat or temp gauge sending unit.
If the engine really is not reaching normal temp you would be burning more fuel.
Assuming the radiator is full of coolant, you could test the sending unit for the gauge, but my money is on a new thermostat.

Jan 22, 2013 | Lincoln Continental Cars & Trucks

1 Answer

Temp guage Rises/almost oveheats when Heater is on. Temp Rises to almost H then drops fast to just above C and repeats but only while heater is on


The cooling system has an air pocket in it. The best solution is to have someone with a vacuum coolant system,and drain and replace the coolant. The only other way,is to jack up the front of the vehicle,and take off the radiator cap,and run it with the heater on full blast. Wait till the thermostat opens,(when coolant level drops)...then top it off while its still running.If you buy ,or have a friend who has a tool called an "Air Lift",..it will make this MUCH easier,and cleaner to fix.

Sep 23, 2012 | Ford Explorer Cars & Trucks

1 Answer

While running the air conditioner the Thermostat goes hot, when I turn the air conditioner off it goes back down. The low coolant light came on but the coolant is full. What else could it be?


To start with, you are talking about the temp gauge. The thermostat is in the engine.
The coolant system could be low or have air pockets and still look full.
First thing I would check is the cooling fan, then the coolant level.

Jun 30, 2012 | 1999 Ford Taurus

1 Answer

Heater donot get hot whil running


It could be a plugged heater core or heater control problem. I assume the blower is working, but the air is cold. The first thing to check is the coolant level, make sure there is coolant in the resivoir. Next see if the temerature gauge reaches the normal operating temperature range. If the gauge reads cold most of the time, it would tell you that the thermsotat is faulty and not allowing the engine to reach full operating temperature. If your car doesn't have a temp gauge, the blue cold engine light might stay on for an extended period of time. The thermostat is supposed to not allow coolant flow in the radiator until the engine reaches operating temperature. If you drive the car for a couple of minutes, from cold start, the radiator or upper hose should be cool until the engine reaches operating temp.

Mar 15, 2011 | 2003 Volkswagen Beetle TDI

1 Answer

2001 dodge stratus engine temperature gauge spikes occasionally


Look for a loose connection to the temperature sender unit on the motor.
If all connections OK, you may need a new temp sender unit.

Jul 28, 2009 | 2002 Dodge Stratus

1 Answer

1996 Cutlass Supreme-Temp shows hot even after engine rebuilt


is the temp gauge sender new
or the engine cooling fans spinning fast enough
air in the heating pipes ? bleeding

Feb 28, 2017 | 1996 Oldsmobile Cutlass Supreme Coupe

2 Answers

Engine runs hot on 2001 Stratus R/T 3.0L V6


Hello, as previously suggested by my collegue it appears you have an air lock. Have you tried parking the vehicle on level ground, from cold with radiator cap off start the car and leave it idling. Make sure the fluid/coolant levels are o.k. and let the engine reach operating temp. Keep some warm water handy and watch/listen the water/coolant system (Keep a safe/sensible distance from radiator) hopefully after a while the system will bubble and boil up let it settle for a few seconds and then top up with very warm water do this until it hopefully stops belching out of radiator. Replace cap and hopefully top and bottom hoses will be warm. Oh! nearly forgot keep all heater controls on hot with blower on full..(Inside the vehicle)
Finally I'm not joshing but is the thermostat in the right way round and functioning correctly? to test drop it in some boiling water it should open almost immeadiatly.
sorry for the epic but I'm here to help and hopefully save you time and money.
Good luck and a Happy New Year to you and your family!
Paul 'W'

Dec 29, 2008 | 2002 Dodge Stratus

1 Answer

Overheating


It may actually be a coolant temp sensor problem - they do have issues sometimes. I'd replace that before anything else - they're generally inexpensive (in the $20 or less range). If, when you ask for a new one, they ask you which one you want, you need the one for the dash gauge. Some cars have one for the gauge and one for the car's ECU. Your problem is with the one that drives the gauge, so get that one.

Jul 25, 2008 | 1992 Isuzu Rodeo

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