R1234yf: Smaller Footprint, New Diagnostics
The benefit of R1234yf is simple. The new refrigerant lasts only 11 days in the atmosphere compared to 13 years for R134a. This is why the EPA is requiring R1234yf to be installed in all new systems by 2021.
5 Tricks To Solving Belt Noise
Variables that the engineer did not factor in can put the belt and your diagnostic skills to the test. But there are five techniques you can use to solve belt noise problems.
VIDEO: How To Deal With Air Conditioning Smells
Andrew Markel discusses what to do to get rid of A/C smells after customers have tried to do it themselves.
OBDII Port Diagnostics
When it comes to data bus diagnostics, a lot can be done with just an OBDII connector breakout box, meter and a scope.
Accessory Belts, Tensioners And Misfires: A Balancing Act
On an engineering level, the design of the accessory belt drive is a balancing act of efficiency, force and vibration. The more contact or wrap a belt has with a pulley, the more force or energy can be transmitted without slipping and the less tension the belt will need. But, this is not great for efficiency because it creates more friction and drag.
Next Generation Start/Stop Systems
Although stop/start idle Âsystems have been used on Âhybrid vehicles for many years, a growing number of non-Âhybrid late-model import models are also being equipped with this fuel-saving technology.
The Case Of The Missing Code On A Chevy Tahoe
The Tahoe’s owner complained that it would stall at highway speed, but it would always restart and usually proceed without further incident until it reached home.
Diagnosing Belt Wear
The original equipment belts on late-model vehicles are made of synthetic materials and are far more heat-resistant and wear-resistant than older materials. These innovations mean serpentine belts may last up to 100,000 miles before they need to be replaced. If a belt fails sooner, you need to be a detective and investigate why it failed.
Stretch Belts: Inspection And Installation
Why stretch belts? For the more than two decades, automakers have consolidated accessory drive components onto one belt. It worked for most engines, but for some it presented issues with noise and vibration as the A/C compressor engaged.
Drivetrain Noises & Wheel Bearing Replacement
Some of the toughest challenges import specialist techs face are noise complaints. And, in order to make an accurate assessment, we take the time to ask our customers questions like: Is the noise present when the car’s stationary or moving? Does it change around corners or under different load considerations? Is it a growl, squeak, groan or rattle?
