Heating / Cooling Archives - Page 8 of 149 - UnderhoodService
Do Cabin Air Filters Help Winter Breathing Problems?

When some people think about cabin air filters, they conjure up images of summertime, air conditioning and musty smells. The reality is that cabin air filters work the majority of their magic when temperatures drop and cause winter breathing problems.

Water Pump Cavitation: What Cavitation In Pumps Means

The tiny “bubbles” of cavitation kill water pumps. While you will never actually see the tiny bubbles of cavitation in pumps, you can see the damage of water pump cavitation that looks like metal eaten by termites. That is because these are not really bubbles you see when it comes to the cavitation in pumps – they are voids.

A New Look at Cooling System Technology

While changes in modern cooling system technology might not be apparent in day-to-day servicing, the fact is that auto manufacturers are continuing to increase fuel economy and power output by changing how the cooling system operates. But technical change has developed very gradually. In the beginning, a few turn-of-the-century auto manufacturers relied on a thermal-expansion

Turbo Tech: Power Stroke 6.0 Diesel Turbo Control

UNDER CONSTRUCTION

GM: Eliminating Air Conditioning Odor

Models: 2014 and prior GM passenger cars and trucks Some customers may comment about musty odors emitted from the HVAC system at startup in hot, humid conditions. Cause This condition may be caused by condensate buildup on the evaporator core, which doesn’t evaporate by itself in high humidity conditions. The odor may be the result

GM Air Conditioning odor
R-1234yf Safety Procedure Checklist

Remember that R-1234yf is only mildly flammable. To become flammable, the mixture of air and refrigerant in a closed area like a vehicle cabin would need to be between 6.5% and 12.3% of the chemical vapor. This mixture must then experience a significant amount of energy to ignite it. In some lab tests, a spark

R1234yf safety procedures
Refrigerant Revolution: What R-1234yf Means for Service, Equipment, Safety

The new R-1234yf refrigerant is more than just a new jumble of numbers and letters on a label. For your shop, R-1234yf means several new procedures, a certification and new equipment in order to properly handle these new systems. Why the difference in handling and servicing R-1234yf systems versus R-134a? The reason is flammability. Don’t

r1234yf vehicle service
Remember the Filters During an AutomaticTransmission Fluid Evacuation Service

Fluid evacuation systems in the automatic transmission service industry are commonly being used in lieu of traditional transmission service methods. The use of this method to replace the transmission fluid is a clean, efficient and safe way to remove hot oil from a transmission. However, there are some risks to doing a fluid evacuation service.

Transmission Filter service tips
Oldsmobile: Engine Overheats, Replaced Engine Coolant Thermostat

Model: 2003 Oldsmobile Alero Complaint The customer states the engine is overheating. Sometimes DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control will be present. Cause Observed the engine coolant temperature gauge, and found the engine coolant temperature exceeded allowable specifications. Observed the engine, and confirmed the engine cooling fan was operating

Engine overheat oldsmobile
Be Careful When Replacing That Diesel Air Filter

Modern passenger and light-duty diesels with ECMs have mass airflow sensors and precisely control fuel ­delivery. Key to the efficiency and lifespan of the diesel engine is the diesel air filter. A restricted air filter will not affect fuel economy but will drastically affect power output. We asked prominent filter manufacturers for some diesel air

diesel air filter replacement gauge
Case Study: 1996 GMC 1500 with no temperature control

• No A/C, no vent control, no temperature control • A/C and recirculation buttons will not light up • All new components, including compressor and control head Cars with a little age on them can be temperamental when diagnosing what might seem at first to be an easy problem. This 1996 GMC had already gone

Chevy AC electrical case study
US Motor Works Named Water Pump Supplier For The New Elio Ultra High Mileage Vehicle

US Motor Works LLC, a manufacturer and distributor of water pumps, fan clutches, electric fuel pumps and timing kits for the automotive and heavy-duty industries, has been selected as the water pump supplier for the new, ultra-high mileage vehicle by Elio Motors. Founded by car enthusiast Paul Elio in 2008, Elio Motors Inc. represents a