The cooling system on you car's engine is pressurized to reduce the evaporation temperature of the fluid, to make the system more efficient. If you open the radiator cap when the engine is hot, the fluid sprays out as the pressure equalizes. This can burn the s##t out of you, seriously. It's dangerous and wasteful of the coolant fluid. WAIT, an hour or so, to let the engine and readiator cool off, before taking off the cap. Then you can add water/coolant mixture. DO NOT PUT ONLY WATER into the system! Use a mixture of coolant and water, or straight coolant from the bottle.
the light is triggered by a switch inside the overflow bottle, If the coolant level is low when the engine is cold, it will trigger the switch to turn on the light until the cooant warms up and expands. The hot water expands and flows through the radiator cap and into the overflow bottle and shuts the light off. Then once the engine is shut off and cools down, the coolant will flow back into the engine again and empty the overflow bottle. so if the light is on, you need to fill the overflow bottle to the "cold" mark.
First, if you only look after it has disappeared, there is no coolant left to be leaking Second, coolant will often leak only under pressure, when it expands from being hot. This often happens when the car is moving, so cannot be observed, or escapes as steam. These leaks can be from small cracks in hoses, often under the clips; from pinholes in the radiator body; from under the pressure cap if the seal is badly worn. If some coolant is already missing, the remainder will heat up faster, setting up a viscious cylcle. In vehicles with an overflow bottle, overheated water goes to the bottle, to be sucked back later by the reduced pressure as the water cools again. In extreme overheating (boiling) the coolant can overflow the bottle, so less is available for sucking back later. Also if the hose to the bottle is cracked or loose, the reduced pressure will suck in air instead of water from the bottle. This leads to a situation where the radiator is quite low (so susceptible to fast overheating) while the overflow bottle contains water, so the user thinks there is enough water and never refills it. Coolant can also leak into the engine block, but this will not "keep" happening, as quite a small amount will cause the engine to stop functioning.
On a 1996 Mercury Sable : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
A blown head gasket is about the only way to get water into the oil, it should be coolant though. If you are running only water in your radiator you have probably been experiencing some leakage or overheating issues and replaced the coolant with water as an emergency measure. ( plain water will do damage to your aluminum engine parts )
Yes, you can. But if you leave in cold area you will have to replace with proper coolant closer to winter. Otherwise it will damage not only your radiator but also the engine.
why does the coolant only leak when engine is off on my 1999 grand am?
Only in an emergency. Antifreeze/coolant provides anti-rust agents, water pump lubricants, lowers the freezing point, and raises the boiling point.
Most vehicles have a coolant reservoir (a clear plastic tub) with a phrase "engine coolant only" printed on the cap. This is where you should add engine coolant.
Engine coolant contains certain chemical properties that water does not. Coolant is used in cars, busses, trucks, and other vehicles, and it is never recommended to use water unless it is only a short-term fix until you can get more coolant. The main difference is freezing point. If you use water as coolant in the winter, it will likely freeze and crack your engine block. In the heat, water boils much faster and produces more heat.
Im guessing you mean engine coolant. Do not add water, only engine coolant unless you want to ruin your car. There should be a small tank to add water near the air filter place, or just follow the hose from the radiator the cap that says to not open when engine is hot.
There are several. If you are asking where to add water or coolant, most have a cap on the top of the radiator which is in the front of the car right behind the grill. Some have a reservoir or bottle on the inside fender. This may be on either side depending on the type of car. It should be marked Coolant Only. In either case, they should only be opened and coolant added when they are cool.