Cylinder Heads Archives - Page 6 of 8 - UnderhoodService
Mitch Schneider: Sealed, Signed and Delivered

Profit, Productivity and Proficiency are destroyed when parts adversely impact our profit model. It doesn’t matter what the reason – someone is going to suffer and I’ll bet you already know who that someone is going to be.

Tech Tip: Cylinder Heads and Air Velocity

If you want the bottom line on picking the right cylinder head, the thing to remember is air velocity. What you need is the highest flow of air at the rpm range you’re going to be spending the most time making power in.

Tech Feature: Hemisphere Exploration – Journey to the Center of the 5.7L Hemi

The 5.7L HEMI Magnum V8, which made its debut in 2003 in Dodge Ram 2500/3500 series trucks, was quite an improvement over the older 5.9L V8 it replaced. The engine was 56 lbs. lighter, produced 41% more horsepower and 12% more torque than the previous motor. Better yet, it also delivered 8-10% better fuel economy.

EPA Allows for the Selling of E15 Fuel for Newer Vehicles

A decision on the use of E15 in model year 2001 to 2006 vehicles will be made after EPA receives the results of additional DOE testing, which is expected to be completed in November.

Directions: E15 — Helping or Hurting American Drivers?

At Issue: E15 fuel blends could be available by March or April of 2011, assuming the EPA makes two approvals for use of E15 in 2001 cars and newer models by the end of the year.

Tech Feature: The DeLorean – Back From the Past

The DeLorean was often referred to as “the ethical sports car,” leading to the relatively small V6 engine and stainless-over-fiberglass construction with good fuel economy and long life in mind.

Tech Feature: General Motor’s Ecotec 2.0L Turbo Engine

General Motors introduced its powerful Ecotec 2.0L direct

Tech Feature: Sports Compacts – Performing in a ‘Maturing’ Market

What started out in the 1990s as an affordable way for kids to bang around with cars that were often handed down from their parents or siblings, later grew into a fledgling market all its own.

Engine Tech Feature: Choosing the Right Fasteners for the Job

Some of the most stressed-out parts of a high-dollar

Cylinder Head Resurfacing Tips: How to Produce an Ideal Surface Finish

Always dress and true the resurfacer wheel face to keep it in proper grinding condition. Never dress or true a wheel above the wheel center line. In addition, always dress or true the wheel as close as possible to the point of actual grinding.

Tech Feature: Diagnosing Automotive Lab Scope Dilemmas

Although digital storage oscilloscopes or “lab scopes” have now become standard equipment for most modern automotive repair shops, they still possess a mystique that tends to intimidate many technicians. Right off the top, a lab scope is basically a voltmeter that displays voltage signals along a time base. The vertical scale measures the amplitude or amount of the voltage and the horizontal scale measures an incremental time line along which the signals are displayed.

Tech Update: Gaskets, Seals, Sealants and Fasteners

Some gaskets can go the distance, while others can not. The factors that typically cause a gasket to fail include age, heat, thermal expansion, abrasion, pressure, vibration, corrosion, material breakdown or poor design.