Head Gaskets 101: Part 1
In 1991, Ford introduced the 4.6L OHC V-8, commonly referred to as the Modular Ford V-8. It had, for its time, a revolutionary new head gasket design called MLS. Prior to that, most head gaskets were steel core designs with some sort of gasket paper attached to the core, so this was a big change
Cleaning Engine Parts: Can You? Should You?
Here’s the kicker – those shops who feel that proper cleaning is too difficult, too time consuming or too expensive are actually leaving money on table when it comes to their engine parts. “At one point in my career, cleaning seemed like it was really difficult,” says Dave Arce of Arce Enterprises, El Cajon, CA.
Engine Balancing: Old School Experience Meets New Technology
The one fact that has held true from the first engine built till today is you must have balance to hold things together and not vibrate apart. I am a Performance Engine Technology Instructor at Daytona State College, therefore I must give you a short applied physics lesson first. The force of a rotating object
The Nitty Gritty of Abrasive Safety
Conventional abrasives have kind of taken a back seat to PCD and CBN cutters in the automotive world in the last few years. Since most engines being rebuilt these days are made from multi-alloy components they are more easily machined with PCD or CBN. But PCD and CBN can’t do everything, so abrasives are still
Issues You May Face When Rebuilding GM Gen IV Engines
There are a couple of problems with the Gen IV motors that may affect how you rebuild the AFM motors, especially the ones with aluminum blocks. • Lifter noise after a two-hour shutdown can be an issue with the engines that have AFM. If the ticking lasts more than 10 seconds after startup and it’s
Most Important Factors for Choosing Valve Springs
To begin, your installed height should always be measured. This is important because the height at which a valve spring is installed can dramatically increase or decrease its rated coil bind clearance and opened/closed pressures. As this can lead to valve spring or camshaft failure, it is vital that you choose the correct spring for
ZDDP: When, Where, What, Why, How?
Government regulations and demands for lower emissions levels become more important than power and performance. Proven components are no longer acceptable and the inevitable changes occur – not always for the best. Things seemed to be much simpler in the 1930s. Engine bearings were made from a soft tin/copper/antimony alloy, commonly referred to as babbit.
Well there is a “rat poison” for engines that is used regularly and daily in nearly any installation shop and by DIYers. SURFACE CONDITIONING DISCS, often referred to as cookies within the shop environment, were originally designed for use in the auto body shop, I believe. Here is where the problem lies when using them
Engine Builder Shop Solutions: February 2012
The Perfect Pilot With the increasingly smaller valve stem diameters it is getting harder than ever to get an air-floated, self-centering, single point, multi-angle pilot aligned with the guide. Here is a pretty simple way of getting you almost dead-on every time and without bending or breaking your $80 to $100 solid carbide pilot.
Cummins Injector Leak Diagnosis Can Be Tricky
Certainly, there’s some common repairs needed on specific engines that are easy to do but doesn’t mean that it makes everything else easy to diagnose. Owners often think that because diesel engines are now electronic the technician should be able to hook up a scan tool and immediately see what is going on. The good
Engine Options Abound In The Street Rod Market
The National Street Rod Association (NSRA) provides the best definition of what street rods are all about. “By definition a street rod is an automobile of 1948 or earlier manufacture which has undergone some type of modernization to include any of the following; engine, transmission, interior refinements, and any other modifications the builder desires. In
Sunnen, MAHLE Clevite to Host Tech & Skills Conference Feb. 25 in Glendora, CA
AERA says engine builders can gain industry knowledge and network with other people with the traveling expense of going to a national trade show. AERA has teamed up with a regional host to offer opportunities in different regions of the country that is closer to a number of shops. Along with the outlined technical programs,
Evolution of File-to-Fit Ring End-Gap Theory Results in Changes
Common signs of butting end gaps are: scuffed ring faces, damaged rings and cylinders, and/or shiny areas on the butt ends of the ring. Using recommendations from ring manufacturers, engine manufacturers and your own personal experience is how most engine builders arrive at the desired end-gap. Current thinking regarding the end gap on most performance
HPBG: Racing Piston Technology
Munro had a problem with melting his cast pistons so he kept trying to develop his own out of melted down GM pistons. Today’s piston makers use a little more modern techniques, but the principle is the same: try, test and improve. On the outside, pistons tend to look the same. They are round slugs
HPBG: Don
In that discussion we hashed over the disparity in coefficients of expansion between cast iron and aluminum (that caused a revolution in head gaskets around the time of the Cadillac 4.1L). We discussed surface conditions and how that affects gaskets and scrub. We discussed gasket coatings and how they remain plastic while not scrubbing and
Cylinder Bores-Machining To Sleeving
The function of a cylinder bore is fairly simple yet quite demanding. The bore is nothing more than a cylindrical void which contains the engine’s air/fuel mixture as it undergoes compression and combustion. The walls of the cylinder have to be strong enough and rigid enough to withstand high combustion pressures and temperatures
Diesel Engine Glow Plugs: Not Just For Starting Anymore
Since diesel engines ignite by using the heat of combustion, they usually need help when the climate changes to the cold of winter. Veteran owners of “old school” diesel engines understand what I’m talking about when I mention the “one-minute of silence.” This was the time every morning when you would turn the ignition switch
Designing and Building a World-Record Beating Porsche V8
We would build for the Blown Gas Modified Sports (BGMS) class where the record is currently 231.5 mph. Another record we were after was the Porsche marquee record for the 928 of 205.6 mph. Our math told us that – because we knew our final drive ratio, tire diameters and engine redline; and if our
Gasket Surface Machining is Critical to Cylinder Head Repair
According to this representative, the relatively short production life of modern engines also shortens the time that an aftermarket gasket company needs to remedy application-specific cylinder head sealing problems. Another issue is that, if the company develops a superior gasket sealing design for specific applications, the engine might disappear from the market before the company’s
Subaru WRX Engine Mods & Dyno Testing
Balancing ultimate performance within legal parameters and practicality is what Z Sport (www.zsport.com) is all about. I spent several hours being shown their clean and well-equipped shop in Everett, WA. Manager Charles Damewood and Owner Gary Watts both were very helpful in explaining what it is that Z Sport does, and how their shop makes