Valve Train Archives - Page 2 of 4 - UnderhoodService
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.

Tech Talk – Engine Innovations to Reach Government Fuel Standards

In recent years, the primary driving force behind engine innovation has been the never-ending quest for better fuel economy with little or no sacrifice in performance. Government regulations and rising fuel prices are forcing automakers to develop new technologies and powertrains that squeeze more power out of every drop of fuel while producing less pollution and greenhouse gas (carbon dioxide) emissions.

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.

Tech Tip: Measuring Valve Spring Retainer Height

To achieve the proper valve spring height while using the minimum amount of valve spring shims can be challenging when working with applications that use other than stock components.

Tech Feature: Family Ties – Servicing Chrysler’s Versatile 3.3L and 3.8L Engines

First introduced as a family back in 1990, these engines have been upgraded and improved to provide good torque for the necessary applications, reasonable fuel economy and a reputation for durability and appropriate performance.

Tech Tip: DTC P0756 Diagnostic Tips on GM, Hummer and Saab Vehicles

Some technicians may have difficulty diagnosing DTC P0756, 2-3 Shift Valve Performance on 4L60-E, 4L65-E or 4L70E automatic transmissions. As detailed in the service manual, when the PCM detects a 4-3-3-4 shift pattern, DTC P0756 will set. Some customers may also describe a condition of a second, third or fourth gear start that may have the same causes but has not set this DTC yet.

Timely Timing Chain Service: ‘Advancing’ Your Position in the Market

Timing chains and gears are engine parts that are usually replaced when an engine is rebuilt or when it has reached a high mileage total. Over time, gear teeth wear and chains stretch. This can cause noise, retarded valve timing (and ignition timing if the engine also has a cam-driven distributor), and a noticeable loss of performance and fuel economy.

Tech Feature: The Changing Face of Automatic Transmissions

Today’s computer systems have completely redefined automotive operation, particularly when it comes to transmission control.

2011 Valve Train Components Catalog Available from SI Industries

SI Industries, Inc. has published a new 104-page full color catalog that contains details on the firm’s wide line of valve train components. These include stainless steel and titanium valves, bronze valve guides, valve seats, valve springs, valve retainers and locks, plus valve stem seals.

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.

Valves: When to Reclaim, When to Replace

Performance engine builders can’t afford to take chances with questionable valves because they have to withstand high rpm and temperatures. Likewise, rebuilders who overhaul high dollar heavy-duty diesel and industrial engines want to minimize their comeback risks by making sure the valves they use are either new or have been carefully inspected and reconditioned to meet OEM specifications. Yet many rebuilders who do passenger car and light truck engines continue to reclaim and reuse a high percentage of old valves.