2 - Internal Leak. An overheating engine can cause more problems especially if you let it go too long and end end up cracking your block. 2. If you continue to drive your car with low antifreeze your vehicle will eventually overheat. It does not happen when the car is steadily moving (even at low speeds). Such a decrease in coolant level is evident in the form of leaks or the smell that arises when coolant … I have an astra 1.7 cdti sri my car is losing coolant and now my car want start and also i dont know wer the coolant is going. Refer to your car’s manual for the proper cap and pressure. (Psst! Not only that, but blue coolant had sprayed all over the inside and outside of my hood and some on my windshield! When there’s a coolant leak in your vehicle, you may notice a sweet smell in your air conditioning or under the hood. In winter, try these tips to stay warm when your heat isn’t working!) Can you tel me what the problem may be please. There are no signs that my engine is overheating, as the thermometer arrow has never reached higher than the middle point. Let’s face it, if the engine is losing coolant, it must be leaking out or leaking in. The indicator will say to reduce the speed as the car is running hot. An internal leak won't cause a puddle of coolant under your car. Although overheating simply means that a car's engine temperature exceeds normal operating temperatures, the causes of overheating are varied. If the coolant is low and your air conditioning is running, you may notice hot air coming from your car A/C vents. 1. Your Your car’s coolant system is one of the most critical on the entire vehicle. There’s a sweet-smelling odor. In serious cases of the latter, it should show up on the dipstick. Instead, it will be noticeable when your coolant level does not stay constant and you find that you need to constantly refill the tank to keep your engine from overheating. If you’re leaking antifreeze but not overheating or you have a car leaking antifreeze when parked, you still have a chance to repair your vehicle for a lower cost. The real problem creeps in when the appropriate coolant levels are not maintained in the reservoir. Only in stop-and--go or standstill traffic (or at idle), my car is running hot or overheating. That’s how you punch a one-way ticket to the ER for a … Why Coolant Disappearing From Reservoir of your car. And since my astra started losing but iv bin ading jus water . One thing you should never do when your car is overheating: Remove the radiator cap and check the coolant. I let my car cool a little bit, then I filled it up again and drove another fifteen miles. It varies on how long it takes. I am not typically losing coolant. Symptoms: 1. OK, I have had fifty years of experience as a gear head working on cars and building high performance motors. Without it, the engine would quickly overheat, causing devastating damage. 3. Well,kim,i will have to say, if you are loosing this much coolant,and don,t see a leak,you have a blowed head gasket.Car may be running ok,but it will be blowed at the exhuast side,meaning it is going out the tail pipe.May be slow leak at gasket,and burning it off,before you see much white mist out the exhaust. What follows is a brief list of some of the most common causes of engine overheating.