I have a 2001 Chevrolet Venture with electric radiator fans that don't kick on until the engine is well above 300 degrees. The dealer say that's the way it's suppose to work. However, the thermostat is set to open at 195 degrees which would indicate to me that the fans should also start at 195 degrees.
Can anyone tell me what temperature the engine is suppose to be at for the fans to turn on?
2007-08-02 04:19:49 · 6 answers · asked by Bingkensmeller 1 in Cars & Transportation ➔ Car Makes ➔ GMC
The thermostat has very little to do with the actual engine temp,the cooling fans are controlled by the computer,it has a predetermined temp that the fans come on at,this cannot be changed.The system is pressurized to about 17to20lbs on the rad cap,the boiling point of plain water is 212degs F at sea level,for every one pound of pressure add 1deg F to the boiling point so add 17 to 20 degs to 212 so now the boiling point will be 229to 232 degsF so having 300degs F is excessive I would say it is overheating,but if you have not experienced loss of coolant through boil over I would not concern myself with the temperature on the gauge,gauges are not that accurate in the first place,and you have had it to the dealer so it is documented if you have a problem it is in their court to repair it.
2007-08-02 04:34:00 · answer #1 · answered by the bear facts 5 · 0⤊ 0⤋
If your motor is reaching 300 degrees Farenheit and still runs, call the papers!!! The boiling point of water is 212 and with the cooling system being pressurized and half glycol, the one fan will come on at around 215 to 220. The other one will cut in at a little higher temp if the motor continues to heat up. They also come on with AC pressures rising in the high side of that system.
2007-08-02 07:17:06 · answer #2 · answered by Deano 7 · 0⤊ 0⤋
the fans should kick on just before boiling point of water, around 210 degrees. I really doubt that you are hitting 300 degrees, where did you get that number from? If you hit 300 degrees you have distroyed every ported vacuume switch under the hood and GM would not have designed it to work like that. once you have the coolant boiling, you loose the ability to cool the motor. 50/50 mixture of antifreez has a higher boiling point than just water and under pressure, from the radiator cap even higher
2007-08-02 04:30:39 · answer #3 · answered by stevet 4 · 0⤊ 0⤋
the fan is meant to diminish off whilst travelling swifter than the fan can blow, as you sluggish in site visitors the fan will kick on and stale, and can proceed to run when you decrease your motor vehicle off till that's cooled down, if the thermostat isn't establishing on the right time, exchange the temp of thermostat (occasion) in the journey that your thermostat is a 240 degree, flow to the factors save and get a 210 or 220 degree. If this does not supply help to might desire to have a project including your head gasket inflicting the exaust gas to superheat your water till now it is going to the radiator, yet attempt the thermostat first.
2016-10-09 01:32:46 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If they told you 300 degrees....find a new dealer. The fan or fans can turn on at 230 to 250 degrees though, that's how they're designed. They also come on when using a/c or defrost to cool condensor.
2007-08-02 04:32:26 · answer #5 · answered by done wrenching 7 · 0⤊ 0⤋
they are a bit high, its around 215-230. or they come on when the air conditoner is turned on. at 300 you'd be on the side of the road.
2007-08-02 14:13:24 · answer #6 · answered by FLYC3 3 · 0⤊ 0⤋