What causes the coolant warning light to come on? When this process fails, the engine temperature increases and triggers the coolant warning light. In order to keep your engine from welding itself together, coolant is pumped around the engine. The side effect of all these explosions is a huge amount of heat. These explosions move the pistons up and down which, in very simple terms, starts to power your engine.
Coolant light series#
In order for your car to work, a series of explosions are created in the combustion chamber. Again if you're just topping off a couple ounces either or is suffice, if you're doing a complete fluid flush you'll have to mix yourself.If the coolant warning light becomes illuminated on your dashboard as you’re driving along, it’s a certain sign that your engine is overheating. That is something that has to happen prior to adding to your vehicle. When you buy the antifreeze it's just that and no distilled water has been added. We had distilled water sitting around and seeing that this is what manufacturers (of both vehicles and antifreeze) recommend that's what was used.Īlso agree that BMW antifreeze is not pre-mixed, I mispoke above. If I was doing a complete coolant flush and change I'd certainly spend the $1 per gallon of distilled. Just have look at their plumbing after some time and plaque will build up in the pipes and joints when regular well water is ran through it daily.īut I agree, if you're just topping off any clean water would suffice. However some folks that use well water for example can attest to the damage that mineral deposits can make (namely calcium and lime). If they just say water you'd have folks putting in everything from muddy river water to salty sea water to you name it. If you think about it, it's safe for manufacturers and coolant vendors to say used distilled because distilled water is a constant. Most 50/50 mixes you find on store shelves is diluted with distilled. I think in general it's just a a piece of mind thing. So if you spill, wipe it up quickly.īTW, BMW antifreeze/coolant is NOT diluted.
If in doubt of the specific gravity of the fluid, purchase an antifreeze hydrometer.Īlso, please take note that the antifreeze/coolant is TOXIC TO ANIMALS and they like the sweet taste of it. I would recommend that one keeps as close to possible to the recommended dilution ratios for your driving environment. The amount of water in the system is about half of the volume, a small amount.Ĥ.Ĝoncentration of hard water minerals in potable water is measured in ppm’s. You are not continually adding more minerals with the addition of large quanties of water.ģ. The cooling system is basically “closed”. If mineral deposits were a problem the manufactures would recommend “Distilled”.Ģ. IMHO I think potable water is just fine and not a problem.ġ. But, I have never read on a container of coolant “dilute with distilled water” and this includes the BMW container and manual. After thinking about it, I just wonder if it’s a theory that an educated car enthusiast seeking perfection thought would be a good idea without real world proof and the masses thought it sounded good. In over 40 years of dealing with cars including changing coolant and rebuilding engines I have not once come across a problem with mineral deposits in the cooling system. I have used it in the past, but only because of convenience. I do find the recommendation of using “distilled water” for topping off and/or dilution interesting. If you need more than that you are either changing your fluid or you have a problem. i dont know how low but im picking up a gallon after workīMW does sell a one liter size antifreeze/coolant (P/N 82 14 2 209 769), which after dilution will make up to two liters. I just got off the phone with service dept, distilled water or bmw coolant can be used.
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