K-Seal SolvTec Tech Tip: Curing Heater Core Leaks

K-Seal SolvTec Tech Tip: Curing Heater Core Leaks

The automatic response is to turn up the blowers to try and clear the mist, but this only compounds the problem.

A classic sign of a heater core problem is when the inside of the vehicle’s windshield persistently keeps misting. Warm coolant is leaking out of the core into the vents and then condensing against the cooler surface of the windshield. The automatic response is to turn up the blowers to try and clear the mist, but this only compounds the problem. 

The solution is usually to remove and either repair or replace the heater core. However, this is a particularly time-consuming task, which on older vehicles is often not cost-effective. An alternative solution is to treat the cooling system with a total coolant leak repair additive. These are designed to flow throughout the cooling system, including through the heater core, to make a quick and low-cost repair. Look for a ceramic-based coolant-friendly product, ideally one that conforms to ASTM D-3147.

For more information, go to kseal.com

You May Also Like

Solving VW False Fuel Pressure Reading

First, verify the customer did not run out of fuel at the time the DTCs were stored.

vw steering wheel squeak

MIL ON with DTCs P310B, P129F, P008B, P129E, P008A, P2540 or P0087 Stored in ECM Fault Memory

2007-2008 Eos (2.0L - BPY)

2007-2008 Jetta (2.0L - BPY)

2007-2008 GTI (2.0L - BPY)

Tech Tips for Dorman’s OE FIX Steering Tie Rod End Assembly

Read the tech note for tips on installation of this unique fix.

Acura Frozen Starter Causes No Start

Why won’t the engine crank after the vehicle has been exposed to precipitation and then freezing temperatures?

Strut Sales

It all comes down to educating the customer about the benefits and asking for the sale.

Beating the Tech Shortage Through Mentoring

How understanding the 80/20 Rule and creative mentoring can make the shortage less threatening.

Other Posts

Nissan Key Will Not Start

Nissan keys use radio frequencies (RF) similar to other everyday wireless devices.

Taking the Fear out of ASE Testing

Spring registration now open; Register by June 30.

How to Pinpoint an Oil Leak Source (VIDEO)

The key is to follow the trail to the farthest forward and highest up point that you can find. Sponsored by Bar’s Leaks.

Audi EVAP Case Study

Let’s look at some of the things that you should know about Audi EVAP systems before trying to tackle such a repair.