When Parts Collide: VW?And Audi Engine Repair?Information
Nothing makes this truer than the changes in automobile engine design over the last 20 years or so. For example, in the early 1970s, VW/Audi designed a small, efficient and reliable engine that was easy to work on and made use of the then fairly new technology of a rubber timing belt without the possibility
Uncovering the Culprits That Cause Head Gaskets to Fail
Most installers should know the first symptoms of a head gasket that is failing are usually a slowloss of coolant with no visible leaks, engine overheating and/or aCheck Engine light with cylinder misfire codes. The Onboard DiagnosticII (OBD II) system should detect any misfires that occur due to a lossof compression or spark plugs fouled
Understanding The Mysteries Built Into The Ford Power Stroke Engine
After servicing and answering questions about these engines for several years, it finally occurred to me that the owners of these engines didn’t understand how they work – and, frankly, neither did many repair techs. I remember when Ford introduced the Navistar engine in the middle of 1994. The rumor on the block was that
Gaskets, Seals, Sealants and Fasteners
The factors that typically cause a gasket to fail include age, heat, thermal expansion, abrasion, pressure, vibration, corrosion, material breakdown or poor design. Some gaskets go the distance and others do not. With head gaskets, problems like detonation and engine overheating can damage the gasket very quickly, causing an otherwise good gasket to crack or
Chevy LT1 Engine and Reverse-Flow Technology
The Chevrolet LT1 5.7L V8 engine that was produced from 1992 to 1997 has some significant differences compared to the previous small block Chevy it replaced, and the third generation LS1 small block that later replaced it. The most obvious difference that distinguishes the LT1 from these other engines is the front-mounted Opti-Spark ignition system.
Performance Carburetors
Carburetors persist because they are relatively simple and inexpensive compared to electronic fuel injection (EFI). Most racers and hot rodders are familiar with carburetors and know something about how to install, tune and adjust a carburetor. They may not always do it right, but all they usually need is a screwdriver and a wrench. They
Variable Valve Timing
With all the scientific technology computing power out there in the world today I have yet to hear an answer to the age old question: What came first, the chicken or the egg? Well the automotive industry has a similar dilemma that continues to plague its existence. Which is more desirable, large displacement and horsepower
Connecting Rods: So Many Choices
Choosing a set of connecting rods for a performance engine is not as simple as it sounds. The rods you ultimately choose to use in an engine will depend on a number of factors, each of which can be critical to the life of the motor and the success of your customer. Your decision will
Shop Solutions: June 2008
How To Handle Engine Diagnostic Nightmares Automotive machine shops are being asked more than ever to help diagnose engine related problems by a variety of customers. Repair shops, car dealers, parts suppliers and DIY’s are all in need of input from machine shop personnel. Two problem areas we see today frequently involve auto manufacturers designs
From ATVs to Karting to Everything In Between
While small engines are in many types of equipment and toys, there isn’t anything small about their potential for engine builders to make a profit. From karts to all-terrain vehicles (ATVs) to motorcycles, for many engine builders looking to add profit margins to their business or to get into a specialized area of the industry,
Carburetor Tuning For Performance and Restorations
The modern “square” design of Holley carburetors was popularly introduced during the late 1950s. Because this style of Holley carburetor featured a simple, modular design with interchangeable parts and a great degree of adjustability, it immediately found favor with performance enthusiasts. We’ll use the Holley 4150-series carburetors to illustrate how to select, assemble, adjust and
New Metals-New Challenges
Cast iron is like an old familiar friend to most of our readers because it’s been around forever. Vehicle manufacturers like cast iron because it’s cheap compared to most other metals, it is strong and durable, and it can be easily cast and machined to make engine blocks, cylinder heads, crankshafts, connecting rods and other
Resurfacing Cylinder Heads & Blocks? Mistakes to Avoid
Cylinder heads and blocks may need to be resurfaced to restore flatness or to improve the surface finish, or milled to change the deck height for a variety of reasons. The deck surface on the head or block may need to be resurfaced if the surface isn’t smooth or flat. A head may need to
Performance Connecting Rods
The connecting rods are a vital link between the pistons and crankshaft. They connect the reciprocal motion of the pistons to the rotational motion of the crank. The weight of the rods is important because it affects the reciprocating forces inside the engine. Lighter is usually better because less weight means faster throttle response and
Engine Builders: Pistons and Rings – Hypereutectic, Valve, Installation
Though pistons can often be salvaged when remanufacturing an engine, sometimes they have to be replaced. The original pistons may have worn or damaged ring grooves, wrist pins or skirts, or they may have cracks. New pistons may also be necessary if the cylinders have too much taper wear and the block has to be
Understanding High Performance Valvetrain Technology
Parts are getting lighter, stronger and capable of producing more horsepower than ever before. One of the driving forces behind these advances has been the proliferation of aftermarket cylinder heads that require unique valvetrain components. In addition, new computer-aided design, modeling and manufacturing techniques are making it easier and faster for valvetrain component suppliers to
Crack Detection
Take a look in the mirror. Smiling back at you, you’ll notice that row of pearly whites. They probably look pretty good. Maybe a bit stained from coffee or smoking, but overall, they seem to be pretty solid, right? If you’re like many people, the fear sets in as soon as you sit down in
Machine Maintenance, Follow The Clues To Avoid The Comeback Blues
Even before you start the teardown, you can gather many clues about what needs to be done. Encourage your counter guys to engage in as much conversation with the customer as possible. Just listening to him tell why he is bringing you this engine will yield tons of information that goes a long way toward
Coretalk: Dallas To Host PERA Spring Technical Meeting March 30-April 1 2006
The meeting, a combination of technical sessions and facility tours, will begin with a cash reception in the hotel’s lobby bar on Thursday, March 30. The technical program is slated to begin on Friday, March 31st, following breakfast hosted by PERA. Ray Fink, PERA’s new president and president of AER Manufacturing Inc., in Carrollton, TX,
Fast Lane: Old-Time Engines Can Bring In Very Modern Profits
Perhaps one of the most often overlooked markets for many shops is the collector car and restoration market, and within this I would also include antique trucks of all sizes, antique tractors and farm machinery and antique construction equipment and machinery. We discussed a few of these markets, such as muscle cars and antique tractor