2002 ford taurus. Radiator overflows but, temp gauge not hot.
I have a 2002 ford taurus. 3 months ago radiator fluid was leaking out of the overflow reservoir. The problem was the plastic overflow reservoir had a split under the bottom. This is a 16 psi pressurized reservoir. I replaced the reservoir. Today after a long trip there is water overflowing out of the reservoir again but, I don't know if the reservoir is split again. The temperature gauge on the dash doesn't go above the mid-range to indicate overheating.
The vehicle has 130,000 miles and has the original thermostat and waterpump.
What should I check. If the reservoir is split again is it likely to be a defective reservoir or could to much pressure cause it to pop?
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Re: 2002 ford taurus. Radiator overflows but, temp gauge...
It could be both your thermostat and water pump, it could also be an air lock in your cooling system. One way or another, I think pressure is building up in part of the system because its not circulating properly.
When its cool, take the top off your reservoir, give the bottom hose to your radiator a good few squeezes, see if the water goes down a little, if it does, you moved something on and probably cured it.
If not, run the engine up, to get it warm and bleed off any air in the system. (Assuming there are bleed taps in the system)
If that also does nothing, I reckon its your water pump. And if your changing that, I'd suggest changing the thermostat at the same time.
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If the thermostat is not opening, the engine will keep getting hotter as you drive. You could be low on coolant and have air pockets in the system which would cause the temp gauge to not be accurate. Is the radiator fan coming on when the tank is boiling ?
There are 4 things you want to check in this order.
1. Make sure your fluid level is up to specifications.
2. Make sure the fluid is travelling through the radiator freely(water pump).
3. Make sure your thermostat is opening. This requires a great deal of caution, leave the radiator cap open (if it has one) and run the engine until the top radiator hose gets hot, If you have no radiator cap, watch for water rising or dropping in the overflow tank.Also watch for bubbles within the overflow or radiator.Also put all temp controls on high on the climate control center and feel for hot air once the engine reaches operating temperature(185-200 degrees). If you don't get heat within the regular time slot of 10-15 minutes you will need a new thermostat.
4. If you discover a large amount of bubbles within the radiator or the overflow tank than you've got a headgasket situation and should not drive the vehicle until necessary repairs are made. Thank you, Dana
It sound like there may be a small leak in the cooling system. You can check this by pressurizing the cooling system. You can buy a pressure checker for about 100 dollars. It will usually show up leaks that are small because you can pressurize the system cold and it won't evaporate.
Heater not working sounds like a blower motor or heating core. Make sure that your antifreeze is green and mix 50/50 with water, now check and sqeeze your hoses running from and to the Radiator and if its VERY hard and has a crunch sound, it's blocked up, use radiator flush and follow directions, If not than look into the Thermostat b/c if it needs repaired than it will stick and let enough fluid into the engine so that it does not overheat yet with the pressure will back up into the resevoir. My new thermostat is a 140 degree and i've never soon my temp meter get to half way after that.
is it possible it is your overflow bottle leaking or too full? If not These cars are bad about headgaskets. Start your car remove radiator cap and let it idle till it is up to temp and top radiator. If you have a leaking gasket or cracked head you would most probably see bubles and the water will try and come out of the radiator fill. What hapens on many is while your driving, combustion gases force the antifreez out into the overflow and it fills up and spills over.
You need to pressure test the cooling system. If it holds pressure, I would look at replacing the water temp. sensor. If it doesn't hold pressure, you have a coolant leak going on. If you don't see it dripping on the ground or inside the car, I would be suspecting head gasket problem.