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Tech Tip 0188

Carbon and Gum Deposits: Their Effect on Engine Performance

Tech Tip #188

Two vehicles with no-start symptoms…both due to fuel related issues.

On one vehicle the customer complaint started with a misfire condition which progressed to an extended crank time to start and eventually a no-start symptom. Performing the basic checks revealed...

Tech Tip 0187

Scheduled Maintenance: Can Prevent Costly Engine Repairs

Tech Tip #187

Timely vehicle maintenance makes good business sense, especially when compared to costly engine repairs or an engine replacement. The extended service intervals have created a major concern for the old school generation, and especially technicians that have serviced vehicles for thirty-plus years. Our early driving and maintenance experience encompassed less fuel...

Tech Tip 0186

Controlling Oil Pressure: It's a Matter of Regulation

Tech Tip #186

When examining oil filters that are deformed from excessive pressure, filter gaskets blown or canister lock-seams unrolled, there is a reason for these conditions. While the oil filter is usually blamed for these conditions, the actual cause is over-pressurization due to a malfunction within the oil pump. Read on for pressurization issues involving GM, Kia and Hyundai...

Tech Tip 0185

Low Oil Pressure Message: Locating the Mystery Filter

Tech Tip #185

A low oil pressure message/light is becoming a common complaint on 2007-2016 GM vehicles equipped with a V8 engine and active fuel management (AFM), which is sometimes referred to as displacement on demand (DOD). These symptoms often occur with no indication of a low oil pressure condition such as engine related noises...

Tech Tip 0184

Neglected Services: The Results Can Be Costly

Tech Tip #184

The primary objective of thorough inspections and system maintenance is to prevent some unnecessary and costly repair expense for the customer. System neglect can result in hundreds of dollars in repair cost that may have been circumvented by performing some basic maintenance...

Tech Tip 0183

Battery Management: The Challenges of a Smart System

Tech Tip #183

Do you know all there is to know concerning a battery replacement? Most assume they do, but later they may realize they should have done some research. Technology changes the way we must perform some services and troubleshoot some systems. Based on the application, battery replacement is becoming a technical procedure that may require a skill level above the average do-it-yourselfer with some basic tools. Instead, the service may require some specialty tools.. 

Tech Tip 0182

Brakes and Suspension Solutions: For Some Difficult to Diagnose Symptoms

Tech Tip #182

Front Brake Caliper Leak

GM has identified a defect in certain 2015 Chevrolet Colorado and GMC Canyon vehicles whereby the front brake calipers on these vehicles can leak brake fluid. The condition is caused by tiny air pockets in the caliper castings that occurred during the casting process. If the casting contains a continuous string of air pockets that penetrate the casting, brake fluid leakage can occur. This condition can result...

Tech Tip 0181

Oil Filter By-Pass Valves: Some Are Hidden in Plain Sight

Tech Tip #181

It is imperative that the lube tech fully understands the importance and function of the oil filter bypass valve. The by-pass valve provides protection for the engine by ensuring adequate lubrication in the event of a filter restriction or during periods of high oil pressure or pressure surges, such as that encountered during cold weather starts/snap throttle...

Tech Tip 0180

Chrysler's 3.6L Pentastar Engine with Oil Filter Housing Leakage

Tech Tip #180

Imagine changing the oil and filter on a customer's vehicle and a few days later they return with a repair bill totaling several hundred dollars for a new oil filter housing to correct an oil leakage problem...

Tech Tip 0179

Troubleshooting Noise and Vibration: Pinpointing the Source Can Be Elusive

Tech Tip #179

Troubleshooting noises and vibrations can be a challenge, even for the most experienced technician. Our training has taught us to take some basic steps or procedures to identify and resolve these issues, but when these techniques fail, how do you handle the customer’s complaint? Repeating the same diagnostics or repairs...

Tech Tip 0178

Hub Bearings And Sensors: When They Fail the Symptoms Can Be Elusive

Tech Tip #178

When a hub bearing or wheel speed sensor failure occurs, the symptoms may involve a noise related complaint, illuminated malfunction indicator lamps, antilock brake related symptoms, traction control issues, or even transmission related symptoms. Following a transmission  replacement...

Tech Tip 0177

Passenger Compartment Ventilation: Eliminating Musty Odors

Tech Tip #177

Eliminating the musty odors or that refrigerator smell can be a challenge. The first ourse of action should involve a complete inspection to determine the source of the foul odors. Deodorizers are usually just a short term solution that results in a recurring condition. Some... 

Tech Tip 0176

Air Filters and Housings: The System Must Be Properly Sealed

Tech Tip #176

Performing an air filter inspection is a key part of the vehicle inspection process. A contaminated or improperly sealed air filter can have a major impact on the performance of the engine, its longevity, or damage to costly electronic sensors. In addition to inspecting the air filter for...

Tech Tip 0176

Excessive Oil Consumption: The Condition Could Be Factory Induced

Tech Tip #175

Dealing with a customer who has been told that the excessive oil consumption with his vehicle is due to the oil filter and the lubricant that you installed can be a challenge. Most customers would not lend credibility to the claim, but the customer is in a difficult position...

Tech Tip 0174

Air Filter Restrictions Due to Snow and Water Related Conditions

Tech Tip #174

In previous articles we have cautioned on the importance of air filter maintenance on diesel applications to prevent catastrophic engine and turbocharger failures. This information is included in Tech Tips #110 Ford's Power Stroke, #124 Servicing Dodge's Turbo Diesel, and #139 Filtering GM's Duramax Diesel. Those articles...

Tech Tip 0173

Engine Noises: Tips for the Lube Service Technician

Tech Tip #173

The lube service technician often gets blamed for conditions that are beyond his control. While the symptom could involve an installation concern or the quality of the parts installed, it may be a condition inherited in the vehicle since production. When faced with a customer...

Tech Tip 0172

Diesel Exhaust Treatment: Taking the Mystery Out of Diesel Exhaust Regeneration

Tech Tip #172

Cleaning up the exhaust on a diesel application has been a challenge for the vehicle manufacturers. Much progress has been achieved with new fuelinjection technology and the addition of a three stage catalytic converter to control hydrocarbons (HC)...

Tech Tip 0171

Lube Service Tips: Identifying Inherent Problems

Tech Tip #171

Identifying problems that are inherent with a vehicle can  save your credibility with the vehicle owner and the shop some unnecessary expense. When servicing a vehicle, many times we get blamed for a condition that may have  been inherent...

Tech Tip 0170

Monitoring Tire Pressures: System Anomalies Can Promote Diagnostic Challenges

Tech Tip #170

Many vehicle owners are not aware that their vehicle is equipped with a Tire Pressure Monitoring System (TPMS) until the horseshoe-shaped light with an exclamation point in the center is illuminated. At that point they panic and call their repair shop, where they are made aware of the on-board technology... 

Tech Tip 0169

Aerated Power Stroke: Dealing with Air in the Fuel System

Tech Tip #169

Aerated fuel can create some major performance problems for a diesel application and some difficult challenges for the technician.  While some fuel injector problems may be inherent in the system by design, many of the issues are the result of improper fuel filter installation procedures, or poor lube and filter service intervals... 

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