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Archive Tag: performance

Oil Cooler Leakage: The Oil Filter Is Often Blamed

Oil Cooler Leakage: The Oil Filter Is Often Blamed

December 6, 2024

Oil leaks are not a normal characteristic and if you are servicing a vehicle and leakage is present, it should be brought to the attention of the vehicle owner and documented on the repair order for future reference. Keep a copy just in case of engine damage that may occur later, especially if the repairs […]

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Diagnostic Challenges That Can Elude an Experienced Technician

Diagnostic Challenges That Can Elude an Experienced Technician

January 9, 2024

Vehicles today incorporate a maze of electronic components that must be considered when troubleshooting a performance related symptom. A vast arsenal of test equipment is necessary to communicate with the electronic systems and components. Systems are so connected that it is difficult for the technician to distinguish between a mechanical, electrical, fuel or emission related […]

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TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

May 5, 2023

GM TRANSFER CASE NOISES Customer complaints involving howling, whining, shudder or grinding noises during parking lot maneuvers in Auto Mode or highway speeds in 4HI or Auto may occur on four wheel drive GM trucks and SUV vehicles. Vehicles affected range from 2014–2023 year models. Specific applications can be identified in GM Service Bulletin 19-NA-136. […]

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Servicing Diesels Lack of Maintenance Promotes Costly Repairs

Servicing Diesels Lack of Maintenance Promotes Costly Repairs

December 30, 2022

Failure to provide timely maintenance on a turbo-charged diesel engine can result in some expensive repairs, especially if it involves replacing a turbocharger or engine. The inexperienced may not realize how important some of the basic services are when servicing these applications. The turbo-diesel engines require a greater volume of air compared to a normal […]

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Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

October 20, 2022

Neglecting maintenance intervals can result in performance issues and internal engine damage due to sludge deposits restricting the flow of lubricant to vital engine components. Evidence of lack of maintenance will normally show up in the oil filter and related housing. The filter media will be impacted with sludge deposits. Where applicable, the filter cap […]

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SERVICING DIESELS: Identifying Normal Characteristics

SERVICING DIESELS: Identifying Normal Characteristics

September 20, 2022

A major part of the diagnostic process is identifying an issue from a normal characteristic. Following are some examples of customer complaints that could be mistaken as a problem when they may be a normal occurrence for the application. DIESEL ENGINES AND NOISE-RELATED SYMPTOMS Customer complaints of ticking, clicking, or cycling noises on 2017–2022 GM […]

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A Difficult Diagnosis: When Multiple Conditions Create Similar Symptoms

A Difficult Diagnosis: When Multiple Conditions Create Similar Symptoms

July 21, 2022

Customer complaints of rough idle, misfires, crank but no start or long crank time symptoms can be a challenge with today’s technology. Random or multiple misfire codes may be stored in memory. Symptoms that seem like an ignition related issue may actually be fuel related, carbon induced, or in some cases a normal characteristic. Fuel […]

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ELECTRICAL CONNECTIONS OR LOW VOLTAGE: Both Can Create Intermittent Electrical Challenges

ELECTRICAL CONNECTIONS OR LOW VOLTAGE: Both Can Create Intermittent Electrical Challenges

June 27, 2022

Low voltage conditions or the integrity of an electrical connection can pose some challenging events for the technician attempting to make an accurate diagnosis. In the world of automotive diagnostics, electrical problems have proven to be the most challenging, especially intermittent problems. Intermittent performance problems can be affected by connection-relate conditions and the presence of […]

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FLUID LEVELS AND SERVICE INTERVALS: LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE

FLUID LEVELS AND SERVICE INTERVALS: LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE

May 20, 2022

LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE Are you accurately checking those fluid levels and recommending fluid flushes or exchanges, where applicable? Unfortunately, many service technicians fall into a pattern of just performing lubrication services requested by the customer, which is usually triggered by a service reminder light indicating that it is time for […]

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SERVICE SOLUTIONS: Challenges for the Lube Service Technician

SERVICE SOLUTIONS: Challenges for the Lube Service Technician

March 3, 2022

DODGE AND JEEP OIL FILTER IDENTIFICATION Precaution must be taken when selecting the correct oil filter for the 3.0L Turbo Diesel engines used in the following applications to prevent engine damage. The vehicle manufacturer cautions about the design differences in the GEN-2 and GEN-3 oil filter cartridges used in 3.0L diesel engines and the importance […]

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Injector Pump Failure: Fuel System Flooded with Metal Particles

Injector Pump Failure: Fuel System Flooded with Metal Particles

February 24, 2022

The shop had performed a service on the customer’s 2015 Silverado equipped with a 6.6L Duramax Turbo Diesel, which included a fuel filter replacement. Weeks later the customer contacts the shop owner requesting re- imbursement in the amount of $14,000 to cover the repair cost of the fuel injection system due to an alleged defective […]

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Carbon and Gum Deposits: Their Effect on Engine Performance

Carbon and Gum Deposits: Their Effect on Engine Performance

November 28, 2017

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…

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Gum and Carbon Deposits

Gum and Carbon Deposits

November 1, 2017

Create Engine Performance Challenges It was a busy morning with multiple vehicles arriving on roll-backs with no-start symptoms. The vehicles ran perfectly the previous day, only to encounter a no-start condition the following morning. The symptoms were that of loss of compression. Each vehicle…

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