Phaser-Style Variable Valve Timing System Controls And Operation
Phasers commonly can be found on just the exhaust cam or on both the intake and exhaust cams.
Timing Belt Replacement on Jeep’s 2.4L PowerTech Engine
In its short life, the engine was available in the 2002-’06 Jeep Liberty (first generation), as well as the 2004-’06 Jeep Wrangler, but was discontinued when Jeep introduced the Compass and Patriot small crossovers.
Tech Talk: Career Building — Developing Engine Building Experiences in School
Though many high school automotive programs have been cut or reduced in recent years due to funding, community colleges and technical schools are seeing steady enrollment in their automotive programs.
Subaru Outback Head Gasket Repair
The Subaru is a 2002 Outback with 109,982 miles. It has excessive oil leaks from the driver’s side head gasket and some from the passenger’s side. The vehicle had been repaired under warranty by the dealer at about 65,000 miles, and most likely the repairs were done without taking the engine out with probably only one head gasket being replaced. To complete the repair, follow the steps outlined in this article.
Tech Tip: Kia Constant Variable Valve Timing (CVVT) Oil Control Valve Inspection
This bulletin provides information related to the Oil Control Valve (OCV) used in Constant Variable Valve Timing (CVVT) systems. If, at any time, the OCV is suspected as a cause of rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes, etc., on a Kia vehicle equipped with a CVVT system, be sure to perform the OCV inspection procedure below before replacement.
The Ins and Outs of Variable Valve Timing (VVT) Systems and Their Role in Vehicle Emissions
By the early 1990s, almost all import automotive manufacturers had a successful variable valve timing (VVT) system in production. These systems offered higher performance from smaller displacement engines at higher rpm. Do you know that VVT is playing a direct role in vehicle emissions and the way gases are burned in the combustion chamber?
Book Report: Tips for Ford Power Stroke Service and Rebuilds
The book covers the vast majority of Power Stroke diesel engines on the road, and gives you the full story on their design.
GM Tech Tip: Crankshaft Rear Main Oil Seal Leaks in Some 60-degree V6 GM Engines
Some GM owners may complain about external oil leaks from these engines. Before replacing the new design rear main oil seal, be sure the PCV system is operating correctly.
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.
Transmission Update: Speed Sensor Diagnostics
Weird and unusual problems are my bread and butter diagnostics. By the time these odd problems get to me the owner of the vehicle has more than likely reached their threshold of poor diagnostics skills and bad results. Their opinion of every technician out there comes down to the same inevitable answer: “We’re all the same.” I doubt that very seriously. It’s almost laughable when you start quizzing them on where they had their car prior to bringing it in.
Tech Tip: Toyota Matrix MIL ON/DTC’s P0011, P0012 or P0016 Set
Under certain conditions, customers may experience an MIL On condition with DTC P0011, P0012 or P0016 stored in the Engine Control Module/ECM.
Tech Spec: Nailing Down the Misunderstood Buick Nailhead
Like the Small Block Chevy, the Rocket 88 Olds, the Ford Flathead and the Chrysler Hemi, the Buick Nailhead engine is one of those that has the immortal smell of history all over it. Yet, unlike its more familiar brothers, cousins and even competitors, the Nailhead has an aura of mystery about it as well.