Engine coolant Archives - Tomorrows Technician
Why Engine Coolant Replacement May Be Necessary, Not Optional

Look at the condition of the additive package and the freezing point to justify coolant replacement.

European Engine Coolant Specifications

With internal combustion engine technology changing, it might take three different coolants to service one European vehicle.

Chevrolet: Rough Running Engine and DTC P0300

Some customers may complain of a rough running engine and the check engine light is on. You may find DTC P0300 (Engine Misfire Detected) set along with a misfire and low compression in one or more cylinders.

Diesel Coolants: The Right Fluid For The Right Application

Which antifreeze should you use in your diesel engine? It seems just when you think that things are starting to settle down, some spec changes. Engine oil has been a hot topic over the past several months and has seen many changes over the past 10 years.

Volkswagen: Identifying And Mixing Factory Fill Engine Coolants

Coolants G12+, G12++ and G13 are lifetime coolants when used exclusively in the coolant system (not mixed with other coolants). Coolants can be mixed, as shown in the chart in this article, but it is always a best practice to change the coolant due to reduced corrosion protection when coolants are mixed.

Proper Coolant Selection Prevents System Degradation

Coolant is easily analogized to blood, both being liquids that are essential to the functioning of an entire complex system. The analogy extends even ­further though because, like blood, coolant has different types, and it’s not a stretch these days to say that swapping an OAT with an HOAT, or vice versa, is on the level of transfusing Type A blood with Type B.

Engine Coolant Temperature Diagnostics

While old-school cooling system service often ­focused on coolant leaks and overheating engines, let’s begin thinking “new-school” by looking at modern cooling systems through the eyes of the engine coolant temperature (ECT) sensor.