BMW 1600 / 1602 / 2002 1969, G-48™ Antifreeze Coolant by Zerex®. 1 Gallon. Concentrate. Blue. Antifreeze products are scientifically formulated to keep your vehicle running in extreme temperatures. Find the right Valvoline antifreeze products for your vehicle. ZEREX ™ G-48 antifreeze coolant is an ethylene glycol-based formulation suitable for passenger vehicles, light trucks and heavy vehicles. Original Equipment Manufacturer (OEM) APPROVED and ensures that it is receiving the original formula of accurate full factory.
Notes: Approved for all BMW engines.
- Unbeatable protection for vehicles requiring genuine G48 fluid
- Provides unparalleled protection of metals and elastomers
- Superior inhibitors to prevent harmful corrosion
- Coolant starts with the basic function of heat transfer and adds antifreeze protection
- Coolant transfers heat and keeps the engine operating
- It's action prevents engine damage from freezing and boiling by keeping the liquid from forming a solid or a gas
Today's engines are often nestled in some tight engine compartments under a sleek hood that's low, (the radiator is) pretty obstructed, the front end (of the car) for style reasons could be closed and (there's) not much good air flow. So in modern cars, they would overheat in a matter of minutes if they didn't have an active functional cooling system.
Depending upon the type of vehicle (car or truck), it may require specialized additives that are intended specifically for the needs of the manufacturer's vehicle you have (particularly for imports), or for the type of mileage on your ride.
In order for heat to be effectively transferred, you need a liquid in the cooling system. If coolant freezes, it expands – and with that expansion comes breaking and cracking, which can lead to engine failure and damage.
If coolant boils, the gas/vapor formed does not transfer heat well, so metal could actually melt in the engine if you don't keep liquid in contact with it in some places that need to stay cool. Coolant also protects metals and non-metallic elastomers (rubber parts and plastic parts in the engine and the cooling circuit).
According to Turcotte, "If you were just to use water and not operate the engine at all in the winter, as soon as it cools below freezing, the water will expand about 10 percent on freezing and makes a big old ice cube. That may fracture the cylinder heads, the block, and split open the radiator seams."