coolant Archives - UnderhoodService
Hybrid Vehicle Fluid Maintenance

There are opportunities your shop can’t pass up just because the car or SUV has a hybrid badge on the back.

Monitor Water Quality When Servicing Coolant

The harder the water, the more likely the water pump is to develop a leak.

Why Does Engine Coolant Need Replacement?

Two specifications can be used to justify replacement — the condition of the additive package & the freezing point.

Understanding Coolants

All-season coolant used inorganic acid technology and worked great for almost 30 years.

Solving Intermittent Overheating

New cooling systems anticipate and influence changes in coolant temperature.

Compressor Oil for R1234yf

Working on R-1234yf systems is not that different from the R-134a variety.

Auxiliary Coolant Pumps

Don’t be fooled into thinking that these pumps will go away with the surge in hybrid and electric vehicle production.

AC Condensers

The characteristics that make the parallel-flow condenser so efficient are among its major drawbacks as well.

Solving No Heat Complaints

Here are 10 guidelines for making sure a customers heat functions.

Cooling System Leak Testing

What replaces the conventional water pump and thermostat is electronic thermostats and electric water pumps.

BMW Spark Plug Replacement

Here are a few things that you need to know before replacing spark plugs in a BMW.

Warn Your Customers About Water Pump Failure During the Summer

Summer is an opportune time for automotive professionals to remind customers to keep an eye on the signs of a failing water pump.  As you know, extreme summer temperatures and added strain on vehicles from activities like long road trips can cause engines to become more susceptible to troubles from excessive heat, making the function