Extended Oil Change Intervals Taking Their Toll On Today’s Engines
Neglected oil change intervals can ruin the best engine oils. As engine oil accumulates miles, it becomes contaminated with carbon, water and various acids, all of which are a by-product of internal combustion and which will form a film of black, gooey sludge on the interior parts of the engine.
Servicing The GM, Isuzu Duramax Diesel Engine
The question that I often hear about the Duramax is “What kind of problems do you see with these engines?” I have to admit that these engines have a great reputation. While some problems have plagued a few of the Duramax engines, there hasn’t been anything as detrimental as what other manufacturers have had to deal with. There are always going to be issues with anything that has to do with internal combustion. The best way to examine the Duramax would be to break down the engines by their generation and evaluate issues of each.
Street Performer: 60 Years Of Chevrolet’s Iconic Corvette
The new Chevrolet Corvette LT1 engine, the first of the Gen 5 family of small block engines, combines several advanced technologies, including direct injection, active fuel management and continuously variable valve timing to support an advanced combustion system.
Using Scan Tools To Diagnose Faulty Fuel Pumps
The most common diagnostic procedures for fuel pumps in the past were analog and hands on. Most fuel pump-related problems could be solved with a pressure gauge and voltmeter. Today, the scan tool is the most important tool when diagnosing a fuel supply problem.
Diagnostic Solutions: Extended Oil Change Intervals
Extended oil change intervals are a mixed blessing. On the upside, extended oil change intervals are conserving precious oil and reducing carbon emissions. On the downside, many vehicle owners are forgetting to check their engine’s oil level between oil changes. The most common result is an engine ruined by excess accumulations of varnish and sludge due to using motor oils that are not approved by the engine manufacturer.
2014 Corvette LT1: The Engine Under the Hood
The art and science behind its combustion system makes the Corvette LT1 one of the most advanced V8 engines in the world.
Tech Feature: Venturing Into GM Duramax Diesel Service
Back in the 1990s, GM wasn’t making too many waves in the diesel truck market. The 6.2L and 6.5L engines had been around for sometime, but they were no match for the release of the Cummins 6BT in the Dodge truck in 1989 and the Ford Powerstroke in 1994.
Diagnostic Solutions: Engine Lubrication System Problems
Auto manufacturers are continuing to reduce vehicle maintenance requirements by extending oil change intervals, but many vehicle owners are forgetting to check their engine’s oil level between oil changes, warns Gary Goms, import specialist contributor. As such, extended oil change intervals are changing how we should recommend and perform scheduled vehicle maintenance.
Diagnostic Solutions: Testing Fuel Delivery Systems – Checking the Basics First Can Facilitate Diagnostic Strategy
Vehicle fuel delivery technology has evolved to include conventional, pulse-modulated and direct fuel injection systems, with each having a specific set of components and testing issues. Gary Goms explains how to avoid some of the most common mistakes in diagnosing fuel delivery systems.
Service Solutions: The ‘CKP’ Script
The signal of the position or rotation speed of the crankshaft position sensor (CKP) contains a lot of information about the engine. When the engine is operating, the engine cylinders push on the crankshaft journal. This is why the crankshaft briefly accelerates after top dead center (TDC) on the expansion (or combustion) stroke. If the fuel did not ignite in the cylinder there would no acceleration.