What’s Hot In Performance – Cams, Lifters & Rockers
The camshaft is really the heart of every performance engine because the cam defines the engine’s breathing potential, its torque curve and peak horsepower. The camshaft controls when the valves open, how quickly they open, how far they open (with some help from the rocker arms), how long the valves are held open, and when
Jeeps: 4.0L Cylinder Heads
The 4.0L came on the scene in 1987 and is still being used, however 2005 may be the end of the journey in domestic production. It’ll be a bittersweet farewell: most who have it love it. This is an old school inline six with lots of torque and there are still many of them out
New Clean Diesel Technology
With gasoline prices in the U.S. bouncing around the two dollars per gallon mark, record high oil prices and growing uncertainty over the price and availability of future oil supplies, any new technology that can give consumers more bang for their buck should be welcomed. Domestic vehicle manufacturers have virtually abandoned further development of electric
Big-Inch Cadillac’s
While some engines are relatively rare in machine shops, the big Cadillacs have remained a consistent source of income. These engines are Cadillac’s last big hurrah at traditional big-cube, flagship GM engines. Surprisingly, they are also a scaled-down version of a V-12 engine that made it through early production and road-testing before being scrapped as
Crankshafts and Bearings – Keeping the Relationship Strong
Today’s engines typically have very tight tolerances everywhere and the crankshaft bearings are no exception. The truer the crank is in its alignment with the mainline and cylinder bore, the tighter the tolerances can be. Bearings and mainline bores must be very precise because during operation the crankshaft is not actually straight: it is elastic.
Researching the Rebuilding Market for Multi-Valve Cylinder Heads
Cylinder head work has provided a good income for many of our readers over the years. All engines eventually need a valve job and guide work if they accumulate enough miles. Head work may also be needed if an engine overheats and blows a head gasket, if the head develops a crack, or an OHC
Showdown Pits Engine Builders Against Themselves
For the 1,500 members of the cheering crowd, the battle was between two teams of professional engine builders, both of which have enjoyed great success building engines for some of NASCAR’s most popular – and successful – drivers. For Lanny Barnes and Mike Maiwald, though, the real challenge wasn’t to beat the other, but NOT
Cylinder Bore Refinishing with Honing Tools
By ring friendly, we mean a finish that provides good support for the rings, retains oil and does not require a lengthy break-in period. For most engines today, a ring-friendly finish means a plateau finish. A plateau bore finish is what all types of rings eventually produce when they are fully seated, so the closer
Lord(s) Of The (Piston) Rings
“He who breaks a thing to find out what it is, has left the path of wisdom.” – Gandalf, Fellowship of the Rings. This is certainly not the case with piston ring technology, although Gandalf from the Lord of The Rings never directed his comments towards engine builders or piston ring manufacturers. Piston ring manufacturers
The New Sport Compact Market
The most popular nameplates are imports such as Honda, Acura and Mitsubishi, but coming on fast are Nissan, Toyota, Mazda, Subaru and Volkswagen – plus domestic models such as Ford Focus, Dodge Neon and even Chevy Cavalier. Nobody is abandoning the small block Chevy or any of the other V8s that have traditionally been the
Valve Seat Installation Procedures
If a valve seat is damaged, cracked, loose, receded or too badly worn to be recut or reground, it can cause a variety of problems: loss of compression, valve burning, valve failure, valvetrain wear and breakage, even head and valve damage if the seat comes loose. For that reason, replacing valve seats is often necessary
The Smooth Science of Cylinder Honing
The basics of honing cylinder blocks hasn’t changed much in recent years, but what has changed are the type of abrasives being used by many engine builders. Silicon carbide and aluminum oxide honing stones of various grits have long been used in power honing machines and portable hones to finish cylinder bores. These types
Ford Y-Block Engine Tricks
The Y-Block Ford is the successor to the flathead and Henry’s first OHV V-8 engine. They were built from 1954-’64 and installed in Fords, Mercurys, Edsels and Ford trucks. They came as 239, 254, 272, 292, and 312s. All along there were just enough cracked heads to become a nuisance, and efforts were made to
Heavy Duty Technology: Piston Failure Analysis
The air/fuel, coolant and oil systems and relationships between various engine operations and the cylinder liner temperatures are critical to maintaining proper operation of all cylinder components. A variety of conditions can cause excessive piston growth or melting, and each will cause varying results – including catastrophic engine failure. The correct air/fuel ratio balance of
A Kubota diesel engine for rebuild
Engine Builders: If you are considering a Kubota diesel engine for rebuild, the following specifications regarding compression pressures will be helpful. For your installer customers, this information will be useful in engine diagnosis. To obtain an accurate value of cranking compression, the engine should be operated until normal operating temperature is reached. If an engine
Engine Crack Detection Technology
It doesn’t matter if you’re rebuilding a high mileage engine and reusing salvaged components or using brand new parts right out of the box – any highly stressed component or casting that has to withstand high loads, temperatures and/or pressures should always be inspected to make sure it is free from cracks or other defects
Back to Basics: Preventing Piston Problems
Burned pistons. Scuffed pistons. Cracked pistons. These are problems no customer wants to experience in an engine you’ve built. Warranty claims can kill your business, so here are some tips on how to prevent these and other common piston problems. First and foremost, if you’re custom building an engine that has already suffered some kind
Great Scott! Wichlacz Takes Over as AERA Chairman
Wichlacz Takes Over as AERA Chairman Scott Wichlacz’s story begins the way many rebuilders’ stories begin: a young boy tinkering with lawnmower and tractor engines, taking apart the component parts of mechanisms and putting them back together, always knowing that this would be his chosen career. One thing led to another, and Wichlacz moved on
Back to Basics: Gasket Installation Tips and Tricks
The installation of gaskets is one of the most important aspects of rebuilding an engine. Gaskets provide a seal between mating surfaces so oil, coolant, vacuum and pressure don
Ford 4.0L V6 Engine
The original 2.6L engine was replaced by the 2.8L, which was upgraded to the 2.9L and then finally bored and stroked to make it into the 4.0L that was used in the Rangers, Aerostars and Explorers starting in 1990. It was replaced by a SOHC engine from this same family at the end of model